US20060205995A1 - Apparatus and method for treating female urinary incontinence - Google Patents
Apparatus and method for treating female urinary incontinence Download PDFInfo
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- US20060205995A1 US20060205995A1 US11/324,028 US32402805A US2006205995A1 US 20060205995 A1 US20060205995 A1 US 20060205995A1 US 32402805 A US32402805 A US 32402805A US 2006205995 A1 US2006205995 A1 US 2006205995A1
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- soft tissue
- urethra
- implant
- perineum
- surgical implant
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/0004—Closure means for urethra or rectum, i.e. anti-incontinence devices or support slings against pelvic prolapse
- A61F2/0031—Closure means for urethra or rectum, i.e. anti-incontinence devices or support slings against pelvic prolapse for constricting the lumen; Support slings for the urethra
- A61F2/0036—Closure means for urethra or rectum, i.e. anti-incontinence devices or support slings against pelvic prolapse for constricting the lumen; Support slings for the urethra implantable
- A61F2/0045—Support slings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Definitions
- This invention relates to an apparatus and method for treating female urinary incontinence and, in particular, to a surgical implant having a sling that passes under the urethra in use and supports the urethra to alleviate incontinence, along with related apparatus and methods for inserting the surgical implant in the body.
- Urinary incontinence affects a large number of women and, consequently, various approaches have been developed to treat female urinary incontinence.
- Those skilled in the art will be familiar with approaches ranging from pelvic floor exercises to surgical techniques such as Burch colposuspension and Stamey type endoscopic procedures in which the sutures are placed so as to elevate the bladder neck.
- One known procedure positions a sling loosely under the urethra. It is generally understood that this treatment alleviates urinary incontinence by occluding the mid-urethra (for example at a time of raised abdominal pressure by coughing or the like).
- a sling is provided in the body using two large curved needles which are provided at each end of the sling, where the sling comprises a long mesh or tape.
- Each of the needles is carried on an insertion tool (which is basically a handle facilitating manipulation of the needles).
- the mesh or tape is usually made of knitted polypropylene (such as Prolene®).
- the mesh or tape is generally covered with a plastics sleeve or polythene envelope to aid smooth insertion, the mesh or tape having rough surfaces to aid retention in the body.
- An incision is made in the anterior vaginal wall and the first of the needles is passed through the incision, past one side of the urethra, behind the pubic bone, through the rectus sheath and out through the lower anterior abdominal wall.
- the second needle is passed through the incision, past the other side of the urethra, behind the pubic bone, through the rectus sheath and out through the lower abdominal wall.
- the needles are separated from their respective insertion tools and also from the mesh or tape such that only the tape and its plastics sleeve are left in the body, passing from a first exit point in the lower abdominal wall, through the rectus sheath, behind the pubic bone, under the urethra, back behind the pubic bone, back through the rectus sheath and out through a second exit point in the lower abdominal wall.
- the plastics sleeve is then removed from the tape and the tape adjusted to a suitable tension (such that the tape provides a sling that passes loosely under the urethra, as described above) by maneuvering the free ends of the tape outside the exit points in the lower abdominal wall whilst the urethra is held using a rigid catheter inserted therein.
- the tape is then cut such that it just falls short of protruding from the exit points in the lower abdominal wall.
- the exit points and the incision in the upper vaginal wall are then closed by sutures.
- the tape is held in position by virtue of friction between the tape's rough edges and the surrounding body tissue (such as the rectus sheath and the body tissue behind the pubic bone) and subsequent natural adhesion of the tape with the body tissue as it re-grows around the mesh material.
- body tissue such as the rectus sheath and the body tissue behind the pubic bone
- the requirement that the needles exit the lower abdominal wall is disadvantageous due to the trauma to the patient in this area and pain of such abdominal wounds.
- a further disadvantage is that the tape comprises a relatively large foreign body mass to be retained within the patient and this can lead to related inflammation, infection translocation, erosion, fistula and such like.
- an incision is made in the perineal skin over a patient's first obturator foramen 134 and an incision 117 is made in the wall of the patient's vagina 116 , a surgical instrument is inserted through the cutaneous incision, over the first obturator foramen 134 and passed through the obturator foramen ( 134 ) at a “safe” zone ( 138 ) close to the inferior pubic ramus ( 140 ), through the obturator muscle, and through the vaginal incision.
- a surgical implant is attached to the surgical instrument and the surgical instrument with the implant attached is retracted such that one end of the implant is pulled out of the body via the incision over the obturator foramen.
- a second incision is provided over the patient's second obturator foramen and the procedure repeated such that the implant is provided under the urethra 118 with a first end of the implant extending out of the first incision made over the first obturator foramen and a second end of the implant extending out of the second incision made over the second obturator foramen.
- the requirement that the needles exit the body over the obturator foramen is disadvantageous due to the trauma to the patient in this area and pain of such wounds.
- a further disadvantage is that the implant comprises a relatively large foreign body mass to be retained within the patient and this can lead to related inflammation, infection translocation, erosion, fistula and such like.
- anatomical damage to nerves and blood vessels may occur during procedures which penetrate the obturator foramen.
- a surgical implant for supporting the urethra comprising: a suburethral support suspended between at least two soft tissue anchors attached at either side of the suburethral support, each soft tissue anchor having retaining means for retaining each anchor in tissue and suspending means for suspending each side of the suburethral support from a soft tissue anchor such that the suburethral support passes under the urethra in use.
- a method of supporting a urethra comprises the steps of: introducing a surgical implant comprising first and second soft tissue anchors and a suburethral support portion therebetween into at least one incision made on the upper wall of a vagina; inserting the first soft tissue anchor on a first side of the urethra behind the pubic bone, and inserting the second soft tissue anchor on a second side of the urethra behind the pubic bone, such that the suburethral support is suspended from the soft tissue anchor and supports the urethra.
- Each of the first and second soft tissue anchors are inserted in and fix in the soft tissue of the perineum without penetrating the obturator foramen.
- a method of supporting a urethra comprises the steps of: introducing a surgical implant into at least one incision made on the upper wall of a vagina the surgical implant comprising first and second ends and a suburethral support section therebetween; inserting a first end of the surgical implant on a first side of the urethra and positioning the first end into soft tissue of the perineum without penetrating the obturator foramen; and inserting a second end of the surgical implant on a second side of the urethra and positioning the second end into the soft tissue of the perineum without penetrating the obturator foramen such that the suburethral support section is positioned under the urethra and provides support thereto.
- a method of supporting a urethra comprises: mechanically coupling, with a surgical implant, a first soft tissue portion of a perineum on a first side of the urethra to a second soft tissue portion of the perineum on a second side of the urethra, wherein the urethra is positioned between the first and second tissue portion, and orientating a portion of the surgical implant underneath the urethra to provide support thereto, wherein the obturator foramen is not penetrated.
- the soft tissue anchor is capable of anchoring in the soft tissue of the perineum.
- the soft tissue anchors comprise soft tissue anchors capable of anchoring in tissue of the retropubic space and/or tissue of the perineum at multiple points via a Christmas tree type configuration of deflectable wings.
- a soft tissue anchor comprises a central portion and the retaining means includes a plurality of projections the projections extending radially from the central portion along a substantial portion of the length of the central portion allowing fixation at a plurality of layers.
- the projections extend radially from the central portion at an angle inclined toward the second end of the central portion.
- the projections are of a shape that they are able to provide additive traction to the soft tissue anchor and allow it to grip fibro-fatty soft tissue and blood vessels of the para-uretheral tunnel below the level of the rectus sheath and/or the soft tissue of the perineum.
- the retaining means are moveable from an inserting position to a retaining position.
- At least one of the retaining means of the implant is moveable from a collapsed position to an extended position as it enables the retaining means to actively move into tissue in at least one layer of the tissue following suitable location of the implant.
- the movement of the retaining means from a collapsed position to an extended position allows the means to move into and be retained in tissue which has been undisturbed or which has not been disrupted during placement of the implant.
- the collapsed position of the implant can be achieved by rolling up, folding, bending, or enclosing the implant in a restrained position.
- the retaining means can be moved from a collapsed position to an extended position at two or more layers in the tissue as this provides for gripping of the tissue by the implant at multiple sites which may require increased force to be used to dislodge the soft tissue anchors of the implant from the anchored positions in the fibro-fatty soft tissue of the retropubic space or from the soft tissue of the perineum.
- the retaining means may be at least one projection which can project from the implant into the tissues of the retropubic space or the soft tissue of the perineum in at least one plane the projection being moveable from a collapsed position to an extended position.
- the retaining means comprise a plurality of projections extending laterally from the longitudinal axis of the implant.
- the projections may extend from the longitudinal axis of the implant such that they point away from the bladder when the implant is positioned such that the suburethral support passes under the urethra.
- the projections may be curved such that they point away from bladder when the implant is positioned such that the suburethral support passes under the urethra.
- the implant may be curved such that the longitudinal edges of the soft tissue anchors of the implant and thus the retaining means in use are directed away from the bladder.
- the retaining means are mechanical in nature in an inserting position the mechanical means are collapsed and in a retaining position the mechanical retaining means are in an extended position.
- the retaining means are chemical in nature, for example glue
- the glue in an inserting position the glue is in a state which minimizes its adhesion to the surrounding tissue and in a retaining position the glue is in a state which allows the glue to adhere to the surrounding fibro-fatty tissue in the retropubic space or in the soft tissue of the perineum.
- the presentation or the nature of the glue is changed to cause the glue to adhere the implant to the surrounding tissue.
- the glue may be encapsulated (inserting position) within a capsule such that the glue cannot interact with the tissue during placement of the implant.
- the capsule of glue may be burst (retaining position) to release the glue and allow the implant to be fixed to the surrounding tissue.
- the glue is held in a releasable container.
- the glue containing releasable container may prevent the glue interacting with surrounding tissues until an appropriate point in the surgical procedure.
- the surgeon may use means, for example a point on the introducing tool to release the glue from the container, for example by puncturing the container and enabling the glue to adhere the implant to the surrounding tissue.
- the glue may be activated by some means, for example heat, light, cold or ultrasound.
- the implant may be moved into the fibro-fatty tissue of the retropubic space or the soft tissue of the perineum without the glue adhering the implant to the surrounding tissue (inserting position) then following the activation of the glue or change in state of the glue by some means, not limited to heat, light, cold or ultrasound, the glue will adhere the implant to the surrounding tissues (retaining position).
- the implant has minimal mass to reduce the likelihood of inflammation or rejection of the implant when it is located in the body. Further, it is preferable that the implant comprises as little material as allows support of the urethra during periods of increased intra-abdominal pressure to minimize the abrasion or the urethra and the likelihood of adhesions forming at the urethra.
- the tissue anchors and the suburethral support are integral with each other as it allows easier manufacture of the implant.
- the overall size of the implant of the present invention can be reduced.
- an implant from a portion of tape material is advantageous as it allows easier manufacture than implants comprising multiple portions comprising of different materials which have to be fixed together. This design minimizes the risk of failure of the implant due to the simplicity of the implant and provides for easier packaging and sterilization of the implant.
- the soft tissue anchors of the implant must be anchored in the tissues of the retropubic space or the tissue of the perineum with adequate tensile strength to counter dislodging by coughing until suitable integration of tissue occurs with the implant.
- At least two forces are exerted on the surgical implant portion which extends under the urethra.
- a first force is the force exerted by the urethra during increased intra-abdominal pressure.
- the surgical implant has to be secured in the fibro-fatty tissue of the retropubic space or the soft tissue of the perineum such that it is capable of supporting the urethra and occluding the urethra at periods of increased intra-abdominal pressure, to minimize incontinence.
- a second force is the force exerted on the surgical implant during periods of increased intra-abdominal pressure which acts in a direction opposite to the direction in which the anchors are inserted into the retropubic space or the soft tissue of the perineum.
- This force can be considered to be a force of dislodgement.
- the implant is anchored in the fibro-fatty tissues of the retropubic space and/or the soft tissue of the perineum such that the implant can resist forces of dislodgement created during periods of increased intra-abdominal pressure.
- Coughing and other causes of increased abdominal pressure typically cause increased pressures of around 200-400 cm water. This has been determined by the Applicant to be equivalent to around a force of 3.75 N through each tape arm.
- the implant is anchored in the fibro-fatty tissues of the retropubic space or soft tissue of the perineum such that the implant can resist forces of dislodgement created during periods of increased intra-abdominal pressure of up to 3 N.
- the implant may be anchored in the fibro-fatty tissues of the retropubic space or soft tissue of the perineum such that the implant can resist forces of dislodgement of up to 5 N.
- the implant may be anchored in the fibro-fatty tissues of the retropubic space or soft tissue of the perineum such that it can resist forces of dislodgement of up to 10 N.
- a soft tissue anchor may comprise a plurality of retaining means.
- a soft tissue anchor may be tapered.
- Curvature of the longitudinal edges of the soft tissue anchor such that they are directed away from the bladder minimizes medial presentation of the retaining means such as projections to the bladder minimizing erosion of the bladder.
- a soft tissue anchor may be shaped as a serrated arrowhead wherein the base portion of the arrowhead is conjoined to the suburethral support.
- the serrated arrowhead may be provided by cutting a flat tape such that the serration's of the arrowhead exist in two dimensions only.
- the soft tissue anchor may have a pointed end at a first end, a base portion at a second end, wherein the longitudinal edges extend between the pointed end and the base and the longitudinal edges are notched to provide a row of projections extending outward from the longitudinal edges.
- the anchor may have a pointed tip at a first end and a base portion at a second end, the first end being the end of the anchor furthest from the suburethral support and the base portion being conjoined to the suburethral support.
- the longitudinal edges of the anchor extend from the pointed tip to the base wherein the longitudinal edges are notched to from a row of tooth like projections extending from the longitudinal edge.
- the soft tissue anchor may comprise a substantially flat head the bottom surface nearest the suspending means of the flat head providing the retaining means which, in use is held in the rectus sheath.
- the soft tissue anchor may comprise a sharp point allowing it to pierce or penetrate the rectus sheath, and retaining means comprising a surface or protrusion directed rearwardly with respect to the sharp point which does not cause the soft tissue to part and thus prevents the soft tissue anchor from being pulled back out through the rectus sheath soft tissue in the direction opposite to that in which it is inserted into the soft tissue.
- the sharp point is provided by the apex of a conical head portion and retaining means are provided by a substantially flat base of the conical head.
- a soft tissue anchor as described herein for anchoring into the fibro-fatty tissues of the retropubic space may be used to anchor in the soft tissue of the perineum.
- the soft tissue anchor may be comprised of plastics material.
- the soft tissue anchor may be comprised of polypropylene.
- the soft tissue anchor is comprised of absorbable material so as to form temporary fixation in soft tissue.
- the soft tissue anchor may comprise a point formed of absorbable material including polyglactin, the sharp point thus capable of facilitating insertion of the anchor, yet being absorbed by the body later.
- the soft tissue anchor may be integral with the suspending means.
- the soft tissue anchor is integrally formed from polypropylene or other polymeric material the attachment between the anchor and the suspending means being formed as a single unit.
- An integral construction of the soft tissue anchor and suspending means has the advantage of simplifying the construction of the soft tissue anchor and suspending means, which can reduce the possibility of defective manufacture etc. and reduce costs and the chance of the soft tissue anchor and suspending means becoming detached once implanted in the body.
- the soft tissue anchor is attached to the suspending means by a thin metal tube crimped or otherwise attached around the suspending means and central portion of the soft tissue anchor.
- the suburethral support of the first aspect of the invention passes under the urethra, loosely supporting the urethra, the suburethral support being held in position by suspending means attached to each of its free ends on either side of the urethra, the suspending means being attached at the opposite end to at least one soft tissue anchor.
- the suburethral support is comprised of flat polymer tape.
- the suburethral support has dimensions sufficient only to pass around the urethra.
- the suburethral support has dimensions of length 15-35 mm, width 5-15 mm and thickness 50-350 mm.
- the suburethral support has dimensions of length 25 mm, width 10 mm and thickness 100 mm.
- the suburethral support has at least two junctions to attach the suburethral support to the suspending means.
- the distance between the soft tissue anchor(s) and the suburethral support is adjustable.
- the surgical implant is preferably of a length in the range 12 cm to 16 cm.
- the soft tissue anchor (or anchors) can be positioned first and the suburethral support then positioned by adjusting the length of the suspending means.
- the suburethral support is provided with at least one attachment tab to which suspending means are releasably or permanently attached.
- the suburethral support is provided by a mesh.
- the mesh is resilient to such an extent that it mimics the physiological elasticity of the tissues which would normally support the urethra.
- the strands of the mesh may be spaced apart to form spaces of 1 to 10 mm.
- the strands may have a diameter of less than 600 mm.
- the strands of the mesh may be arranged to form a warp knit diamond or hexagonal net mesh.
- the suburethral support may be formed from polyester or polypropylene.
- the suburethral support may be formed from absorbable material or may be encapsulated by an absorbable coating. In particular embodiments, such a coating may be applied to only one side of the implant.
- the suburethral support may be formed from biocomponent microfibres comprising a core and surface material.
- the surface material may be readily absorbable by the body while the core material may remain in the body for a longer period of time.
- the surface material may be polylactic acid and the core material may be polypropylene.
- the suburethral support of the implant may be absorbable at a different rate than the soft tissue anchors of the implant, for example the soft tissue anchors may be absorbed within six weeks of implantation, while the soft tissue anchors may remain for 9 months.
- the suburethral support comprises an attachment tab comprising a tunneled element and an aperture, the tunneled element being located at each of the free ends of the suburethral support on either side of the urethra at a position that the suspending means are capable of being introduced through, the tunneled element co-operating with the aperture such that suspending means can be passed through the tunneled element and then through the aperture, the aperture being present on the opposite surface of the suburethral support to that which contacts the urethra the aperture having an edge capable of co-operating with a ring element and the ring element being capable of being fitted around the aperture trapping the suspending means between the ring element and the edge of the aperture such that the suspending means remain fixed in an adjusted position wherein the suburethral support hangs loosely under the urethra.
- the attachment tab comprises at least one slot through which suspending means can be passed, the suspending means being permanently attached to the slot by tying.
- the attachment tab comprises jamming slots that the suspending means can be permanently attached by being threaded through the jamming slots such that the suspending means are held in an adjusted position.
- the suburethral support is capable of being suitably positioned under the urethra by altering the position of the soft tissue anchors within the body such that at least one soft tissue anchor is secured in the soft tissue or in the rectus sheath and a subsequent anchor is inserted into the soft tissue or rectus sheath to a suitable depth such that the suburethral support hangs loosely under the urethra.
- the suspending means may be attached to the suburethral support by heating such that the suburethral support and/or suspending means melt and form a join.
- attachment tabs may have closure means for gripping the suspending means.
- the suspending means may be any means suitable for connecting each end of the suburethral support to the soft tissue anchor (or respective soft tissue anchors).
- the suspending means comprises a plastics strip.
- the plastics strip has smooth edges.
- the plastics strip comprises material such as polypropylene or other suitable non-absorbable or absorbable polymer tape.
- the plastics strip is 3-5 mm in width.
- the plastics material comprises pores which extend through the plastics material from a first surface of the plastics material to a second opposite surface of the plastics material said pores ranging in width across the surface of the plastics material from 50 mm to 200 mm, the pores allowing tissue in-growth to secure the strip in the body.
- the plastics material may comprise pits, that indent but do not extend through the plastics material, on at least one of the surfaces of the plastics material, the pits ranging in width from 50 mm to 200 mm, the pits allowing tissue in-growth to secure the strip in the body.
- the plastics material comprises pits or pores ranging in width across the surface of the plastics material from 100 mm to 150 mm.
- the pits or pores are distributed across the complete surface of the plastics material.
- the pits or pores are distributed only in a particular portion of the surface of the plastics material.
- the pits or pores are created by post synthesis modification of the plastics material.
- the pits or pores are created by post synthesis treatment of the plastics material by a laser.
- the pits or pores of between 50-200 mm are created during synthesis of the plastics material by spaces between the waft and weave of mono-filament or multi-filament yarns when the filaments are woven to form a mesh.
- pits or pores formed during the synthesis of plastics material are formed by the inter-filament spaces created when mono-filaments are twisted to create multi-filaments, the multi-filaments then being woven to form a mesh.
- the suspending means is provided with a plurality of microgrooves of width between 0.5-7 ⁇ m and of depth 0.25-7 ⁇ m on at least one surface of the plastics strip.
- microgrooves are 5 ⁇ m in width and 5 ⁇ m in depth.
- the plurality of microgrooves are aligned such that they are substantially parallel with each other.
- the plurality of microgrooves are aligned such that they are separated by ridges which range in size between 1-5 ⁇ m in width.
- microgrooves are separated by ridges of 5 ⁇ m in width.
- the ridges are formed by square pillars and the base of the microgroove is substantially perpendicular to the square pillars.
- the ridges are formed by square pillars and the base of the microgroove is beveled in relation to the pillars.
- microgrooves are present on at least one surface of the suspending means.
- microgrooves are present on a plurality of surfaces of the suspending means.
- microgrooves act to orientate and align the proliferating fibroblasts on the surface of the plastics material and cause axial alignment of collagen fibres and formation of at least one strong ordered neoligament.
- the orientation and alignment of the proliferating cells is capable of adding mechanical strength to the tissue which forms around the plastics material such that it is more able to support the urethra.
- the suburethral support of the present invention has neither pores, pits or grooves to discourage the formation of peri-urethral adhesions.
- the implant may be comprised of non-absorbable material.
- the implant may be comprised of absorbable material.
- the implant is comprised of polypropylene.
- the implant is comprised of resilient material such that if the implant is not restrained it adopts the original shape defined during production of the implant.
- the implant was capable of longitudinal extension such that it still provides suitable support to the urethra during periods of increased abdominal pressure, but is able to move and extend in a similar fashion to tissues which physiologically support the urethra.
- a resilient zone wherein the resilient zone provides for the resilient extension of the surgical implant in a longitudinal direction such that the surgical implant behaves in a similar manner to dynamic bodily tissue.
- the resilient zone is located in at least one of the anchors of the implant.
- the resilient zone is interposed between an anchor and the suburethral support.
- the resilient zone of the implant may be capable of allowing the resilient extension of at least part of the implant due to its geometric design.
- the resilient zone of the implant may be capable of allowing resilient extension of at least part of the implant due to its micro material design.
- the resilient zone of the implant may be capable of allowing the resilient extension of the implant due to a combination of its geometric and micro material design.
- the geometric design may include multiple strips of material.
- the geometric design may include multiple strips of material arranged into bows, the bows being capable of deforming and providing resilient extension to the implant.
- the geometric design may comprise a concertina portion such that a part of the implant can extend in a direction substantially perpendicular to the folds of the concertina.
- the implant may comprise a folded portion, the fold perpendicular to the longitudinal axis of the implant, which allows limited extension of the implant in a longitudinal direction.
- a folded portion In an extended position a folded portion is moved away from a second folded position.
- a closed portion In a closed portion the folded portions are brought together. Different amounts of force in a longitudinal direction may be required to move the concertina portion from a closed to an open position.
- Suitably resilient extension of a portion of the implant may occur when an extension force of 1 to 5 N is applied to the implant along its length.
- Resilient extension of a portion of the implant may occur when an extension force of 2 to 3 N is applied to the implant along its length.
- the resilient zone may provide for the extension of the implant along its longitudinal length of around 2 to 5 mm.
- the unextended implant may be of length 6 to 22 cm.
- the unextended implant is of length 8 to 20 cm.
- the surgical implant is of unextended length 10 to 15 cm.
- the unextended length is equal to the length of the implant.
- each soft tissue anchor is of at least 1 cm in length and not greater than 8 cm in length.
- each anchor may be 5 cm in length.
- the suburethral support may be of at least 2 cm in length.
- a method of supporting the urethra comprising the steps of, introducing a surgical implant as described above into an incision made on the upper wall of the vagina, inserting a soft tissue anchor on a first side of the urethra behind the pubic bone, inserting a second soft tissue anchor on a second side of the urethra behind the pubic bone, such that the suburethral support is suspended from the soft tissue anchor and supports the urethra.
- the invention also provides the use of the method of supporting the urethra in treating urinary incontinence or uterovaginal prolapse.
- the soft tissue anchors are inserted in the rectus sheath.
- the soft tissue anchors are inserted in the fibro-fatty soft tissue of the retropubic tissue space and do not penetrate the rectus sheath.
- the soft tissue anchors are inserted in and fix in the soft tissue of the perineum.
- the above methods have the advantage that only a single vaginal incision is required for introduction of the surgical implant and the need for exit of the surgical implant and thus exit wounds is removed, for example exit wounds in the abdomen or at the obturator foramen are not required.
- the surgical implant does not penetrate the endopelvic fascia.
- the surgical implant penetrate of extend through the obturator foramen.
- a method of supporting the urethra comprising the steps of: introducing a surgical implant comprising first and second soft tissue anchors and a suburethral support therebetween into at least one incision made on the upper wall of the vagina, inserting a first soft tissue anchor on a first side of the urethra in a lateral direction away from the urethra, inserting a second soft tissue anchor on a second side of the urethra in an opposite lateral direction from the first soft tissue anchor and away from the urethra, such that the suburethral support is suspended from the first and second soft tissue anchors and supports the urethra, wherein each of the first and second soft tissue anchors is positioned in the soft tissue which comprise the perineum.
- a method of supporting the urethra comprises the steps of: introducing a surgical implant into at least one incision made on the upper wall of the vagina the surgical implant comprising first and second ends and a suburethral support section therebetween; inserting a first end of the surgical implant on a first side of the urethra and positioning the first end into the soft tissue of the perineum without penetrating the obturator foramen; inserting a second end of the surgical implant on a second side of the urethra and positioning the second end into the soft tissue of the perineum without penetrating the obturator foramen such that the suburethral support section is positioned under the urethra and provides support thereto.
- the method of supporting a urethra comprises the steps of: introducing a first end of a surgical implant into at least one incision made in a vaginal wall, the surgical implant comprising first and second ends and a suburethral portion there between; inserting the first end of the surgical implant on a first side of the urethra and positioning the first end into tissue of a perineum without penetrating the endopelvic fascia; introducing the second end of a surgical implant into the at least one incision made in a vaginal wall; inserting a second end of the surgical implant on a second side of the urethra and positioning the second end into tissue of the perineum without penetrating the endopelvic fascia such that the suburethral support portion is positioned underneath the urethra and provides support thereto.
- a portion of the surgical implant grips at least one of first and second soft tissue portions of the perineum.
- a first soft tissue anchor on a first side of the urethra in a first tissue of a perineum and a second soft tissue on a second side of the urethra in a second tissue of the perineum, wherein the urethra is positioned between said first and second soft tissue portions and the surgical implant is positioned underneath the urethra to provide support thereto, mechanically couples a first tissue of the perineum to the second tissue of the perineum.
- no part of the surgical implant penetrates the obturator foramen.
- no part of the surgical implant extends through the obturator foramen.
- the soft tissue anchor(s) or ends do not penetrate or fix into bone.
- a soft tissue anchor of an implant is inserted through an incision in an upper wall of a vagina and inserted towards a first obturator foramen behind an inferior pubic ramus until about half of the length of the implant is inserted.
- the soft tissue anchor of the implant is thus placed such that the soft tissue anchor is located in the soft tissue of the perineum.
- a second soft tissue anchor may then be inserted into the vaginal incision and inserted towards a second obturator foramen behind an inferior pubic ramus until the second half of the implant is inserted.
- the second soft tissue anchor of the implant is thus placed such that the soft tissue anchor is located in the soft tissue of the perineum.
- a first end of a surgical implant may be inserted through an incision in an upper wall of a vagina and inserted towards a first obturator foramen behind an inferior pubic ramus such that around 7 cm of the implant is inserted.
- a second end of a surgical implant may then be inserted through an incision in an upper wall of a vagina and inserted towards a second obturator foramen behind an inferior pubic ramus such that around 7 cm of the implant is inserted.
- the locating of a soft tissue anchor in the soft tissue of the perineum may be advantageous as it is less likely that the bladder may be perforated than in retropubic methods where the needle passage is medial and therefore near to the bladder.
- the suburethral support is placed midurethra, without tension, but in a position to support the urethra.
- the suburethral support may be positioned at an alternative suitable anatomical location such as to be therapeutically effective should for example the midurethra be damaged or have significant scar tissue.
- the soft tissue anchors do not penetrate the obturator muscle.
- FIG. 1 is an illustration of a surgical implant for anchoring in the rectus sheath
- FIGS. 2 a and 2 b are line drawings of the suspending means attached to the suburethral support, positioned underneath the urethra,
- FIG. 3 is an illustration of one embodiment of a suburethral support
- FIG. 4 is an illustration of a second embodiment of a suburethral support
- FIG. 5 shows suspending means being threaded through an attachment tab of a suburethral support
- FIGS. 6A , B and C show alternative methods of attaching suspending means to a suburethral support
- FIGS. 7A, 7B and 7 C are illustrations of a soft tissue anchor for insertion through the rectus sheath
- FIGS. 8 A-C are sequential illustrations of insertion of a soft tissue anchor of FIG. 7 .
- FIG. 9 is an illustration of a soft tissue anchor mounted on an introducing tool for insertion through the rectus sheath
- FIG. 10 is an illustration of a retropubic soft tissue anchor for use in the fibro-fatty tissues of the para-urethral tunnel
- FIG. 11 is an illustration of the placement of a soft tissue anchor of FIG. 10 .
- FIG. 12 is an illustration of an implanting tool and a soft tissue anchor inserted into the rectus sheath
- FIG. 13 is an illustration of the surgical implant implanted into the rectus sheath
- FIG. 14 is an illustration of the prior art contrasted with the technique wherein the anchor is inserted in the rectus sheath
- FIG. 15 is an illustration of the tool used to insert the surgical implant
- FIG. 16 is an illustration of the surface architecture of the suspending means
- FIG. 17 illustrates a diagrammatic side view of an embodiment of an implant with portions of glue provided on the soft tissue anchors
- FIG. 18 ( a ) illustrates an embodiment of an implant comprising a suburethral support formed from mesh
- FIG. 18 ( b ) is a further illustration of the embodiment of the implant of FIG. 18 ( a ),
- FIG. 19 is an embodiment of an implant comprising resilient zones
- FIG. 20 illustrates a diagrammatic view of an implant wherein the soft tissue anchors are provided with grooves and pores and portions of glue,
- FIG. 21 is a diagrammatic representation of the anatomy of the pelvic region illustrating the obturator foramen, inferior pubic ramus, pubic symphysis and the safe transorbturator exit zone as used in prior art methods,
- FIG. 22 is a cross-section illustration of FIG. 26 that illustrates insertion of an embodiment of a surgical implant wherein the soft tissue anchors are fixed in the soft tissue of the perineum,
- FIG. 23 is a cross-section illustration of FIG. 26 that illustrates an embodiment of a surgical implant wherein the soft tissue anchors are fixed in the soft tissue of the perineum,
- FIG. 24 illustrates a prior art device anchored in the skin above the obturator foramen
- FIG. 25 illustrates a prior art device anchored in the skin above the obturator foramen
- FIG. 26 illustrates placement of an embodiment of a surgical implant in the soft tissue of the perineum without insertion into the obturator foramen wherein the implant is in the body
- FIG. 27 illustrates placement of an embodiment of a surgical implant in the soft tissue of the perineum without insertion through the obturator foramen
- FIG. 28 illustrates an embodiment of a surgical implant comprising a marker on the suburethral support and soft tissue anchors comprising projections and glue, and
- FIG. 29 illustrates a further embodiment of a surgical implant comprising a marker on the suburethral support.
- a surgical implant for treating female urinary incontinence has a suburethral support 10 , suspending means 20 and at least two soft tissue anchors 30 , the suburethral support 10 being positioned in use, loosely under the urethra.
- the suburethral support has a length L of around 25 mm and a width W of around 10 mm such that it passes around the urethra with a minimum of excess material, although other similar dimensions would also be suitable.
- the suburethral support 10 is made from flat polymer tape.
- suspending means 20 are provided which attach to the suburethral support 10 at a first end 22 , 24 .
- the suspending means 20 are attached at a second end 26 to a respective soft tissue anchor 30 .
- the soft tissue anchor 30 of the embodiment described comprises a central portion 32 and four winged sections 34 which are attached to the central portion at a first end 38 by resilient hinge means 36 and radially extend from the central portion 32 such that when viewed from the front the anchor device resembles a cross.
- the wing sections 34 of the soft tissue anchor 30 having a resting position in which they are inclined towards the rear 40 of the central portion 32 at an angle of around 45°.
- the wing sections 34 of the soft tissue element 30 may adopt a deflected position which means the penetration of the soft tissue anchor through the tissue and rectus sheath 120 is more effective.
- Movement of the soft tissue anchor in a direction opposite to which it was introduced into the soft tissue causes the wing section to be deflected until an endstop 46 is reached which prevents the wing sections 34 moving beyond a point substantially perpendicular to the central portion 32 and prevents retraction of the soft tissue anchor 30 from the soft tissue.
- the soft tissue anchor 30 further comprises a hollow portion 48 which extends from the first end 38 to the second rear end 40 of the central portion 32 through which an introducing tool 50 may be placed, as shown in FIGS. 8A-8C .
- the introducing tool 50 extends through the hollow portion 48 such that it extends as a sharp point 60 from the first end 38 of the soft tissue anchor 30 such that the sharp point 60 allows penetration of the tissue by the soft tissue anchor 30 .
- Stud like projections 42 which extend radially from the central portion 32 are angled such that they extend further radially from the central portion 32 as they extend towards the rear 40 of the central portion 32 , this inclination allowing the soft tissue anchor 30 to pass more easily into the soft tissue.
- a recessed portion 44 is positioned toward the rear end 40 of the central portion 32 to facilitate attachment of the suspending means 20 to the soft tissue anchor 30 .
- the suspending means 30 may be respectively attached to the soft tissue anchor 30 at this recessed point 44 by crimping a tube around the suspending means 20 to fix the suspending means 20 to the soft tissue anchor 30 .
- the soft tissue anchor may be suitably positioned in the rectus sheath 120 using an introducing tool 50 .
- the tool 50 comprises a handle 52 and elongate body 54 .
- the elongate body 54 is curved through an angle of approximately 30° to facilitate positioning of the soft tissue anchor 30 in the rectus sheath or surrounding soft tissue of the human body from an incision in the upper wall of the vagina (as described below).
- the soft tissue anchor 30 is located on the elongate body at a narrowed portion 58 of the introducing tool such that the soft tissue anchor is held in place by an abutment 56 such that the narrowed portion 58 may extend through the hollow portion 48 of the soft tissue anchor 30 such that the point 60 of the insertion tool 50 protrudes from the first end 38 of the soft tissue anchor and allows the soft tissue anchor to be inserted into the human body through the soft tissues and more specifically through the rectus sheath 120 during the placement of the soft tissue anchor.
- FIGS. 8B and 8C The placement of the soft tissue anchor 30 on the insertion tool 50 is shown in FIGS. 8B and 8C , which shows the soft tissue anchor 30 being pushed through soft tissue fascia, such as the rectus sheath 120 .
- soft tissue fascia such as the rectus sheath 120 .
- the soft tissue anchor may alternatively be comprised of a central portion 70 and a plurality of projections 72 the projections extending radially from the central portion 70 and arranged along a substantial portion of the length of the central portion 70 .
- the projections 72 may be of any shape such that they provide resistance within the fibro-fatty soft tissue and blood tissues of the para-urethral tunnel in the direction opposite to that in which the soft tissue anchor is introduced.
- This resistance is also provided by the multiple layers, typically between 5-10 layers of projections 72 which extend from the central portion 70 .
- the soft tissue anchor should be positioned as high in the retropubic space as possible in the fibro-fatty soft tissue.
- the soft tissue anchors may be provided with projections which allow penetration of the soft tissue of the perineum and which provide resistance to removal of the anchors from the soft tissue of the perineum.
- an embodiment of an anchor comprises multiple layers of projections 72 .
- the multiple layers of projections enable the anchors to be fixed in the soft tissue of the perineum with suitable fixation without requiring the extending through the obturator foramen.
- the introducing tool comprises a collar which releasably retains the projections during insertion into the retropubic space.
- the collar may comprise a semi-sharp beveled needle.
- the introducing tool is withdrawn removing the collar from around the plurality of projections 72 of the soft tissue anchor, which due to their memory expand outwards from the central portion 70 and grip the fibro-fatty soft tissue of the retropubic space at multiple layers.
- the collar of the introducing tool which extends around the soft tissue may contain a cross-sectional opening such that once the tool is withdrawn the collar may be removed from the surgical implant by passing the implant through the cross-sectional opening.
- the invention also provides an introducing tool for use in inserting the soft tissue anchor.
- Suspending means 20 attached to the soft tissue anchors are formed from a strip of plastics material such as polypropylene which is sufficiently soft to avoid damaging the urethra or surrounding body tissue and suitably inert such that it can be left in the human body for a long period of time without causing adverse reactions.
- plastics material such as polypropylene which is sufficiently soft to avoid damaging the urethra or surrounding body tissue and suitably inert such that it can be left in the human body for a long period of time without causing adverse reactions.
- the polypropylene mesh strip of 3-5 mm in width which forms the suspending means 20 has smooth edges to avoid adhesion of the soft tissue to the strip, reducing problems associated with leaving foreign material in the human body for long periods of time.
- the polypropylene mesh strip further comprises pores or pits 80 ranging in width across the surface of the strip from 50mm to 200 mm, which extend through the strip from a first surface of the strip 26 to a second opposite surface 28 of the strip the pores 80 allowing tissue in-growth to secure the suspending means 20 in the body.
- the pores 80 are created by post synthesis treatment of the polypropylene mesh material by a laser.
- the polypropylene mesh which forms the suspending means 20 also comprises microgrooves 82 of width 5 ⁇ m and of depth 5 ⁇ m on the surfaces of the polypropylene mesh.
- microgrooves 82 are aligned such that they are substantially parallel with each other and separated by ridges of around 5 ⁇ m in width.
- the ridges are formed by square pillars the base of the microgroove being substantially perpendicular to the square pillars or beveled in relation to the pillars.
- the microgrooving 82 being present on both surfaces of the suspending means to orientate and align the proliferating fibroblasts on the surface of the plastics material and cause axial alignment of collagen fibres and formation of at least one strong ordered neoligament.
- the suburethral support is not provided with pores, pits or grooves to discourage the formation of peri-urethral adhesions.
- the length of the suspending means 20 can be altered such that the suburethral support 10 hangs loosely under the urethra.
- the suspending means 20 are attached at a first end 22 , 24 to the sides 12 , 14 of the suburethral support 10 , which extend on either side of the urethra.
- a preferred method of altering the length of the suspending means 20 attached to the suburethral support 10 comprises a tunneled element 25 at each of the free ends 22 , 24 of the suburethral support 10 on either side of the urethra.
- the tunneled element 25 extends from the edges of the suburethral support 10 to an aperture 15 , the aperture being present on the opposite surface 16 of the suburethral support 10 to the surface which contacts the urethra 17 , the aperture 15 having an edge 18 able to co-operate with a ring element 19 such that the ring element which has memory can be pushed onto the edge 18 of the aperture 15 trapping the suspending means 20 between the edge of the aperture 18 and the ring element 19 thus securing the suburethral support 10 along a particular desired length of the suspending means 20 such that the suburethral support 10 hangs loosely under the urethra.
- FIG. 5 shows an alternative method of attaching the suspending means 20 to the suburethral support 10 , the suspending means 20 being threaded through jamming slots 21 such that the suspending means 20 are permanently attached to the jamming slots 21 by being pulled into the jamming slots 21 as shown in FIG. 5 such that the suspending means is held tightly in position.
- the suspending means 20 may be passed through slots and the suspending means permanently attached to the slots by tying.
- the soft tissue anchor 30 is placed on the introducing tool 50 as described above.
- An incision 117 is made in the upper wall 116 of the vagina, as shown in FIG. 11 , and the introducing tool 112 is passed through the incision 117 , past one side of the urethra 118 , behind the pubic bone 119 and into the rectus sheath 120 . It is apparent to the surgeon when the rectus sheath 120 has been penetrated as this stage of insertion presents significant resistance. Once the head 58 of the introducing tool 50 and the soft tissue anchor 30 have passed through the rectus sheath 120 , the resistance diminishes and the surgeon ceases to insert the introducing tool 50 .
- the introducing tool 50 is retracted from the body releasing the soft tissue anchor 30 . Due to the wing sections 34 on the central portion 32 of the soft tissue anchor 30 , the soft tissue anchor 30 is retained by the rectus sheath 120 as the introducing tool 50 is retracted. Thus, the suspending means remains in the body, secured by the soft tissue anchor which is opposed by the rectus sheath 120 , as shown in FIG. 13 .
- the suspending means 20 are passed through the tunneled elements 25 of the suburethral support 10 , and the suspending means 20 are pulled through the aperture 15 until the suburethral support 10 is positioned such that it passes under the urethra 118 .
- the suspending means 20 are then fixed in place by placing a ring element 19 over the edge 18 of the aperture 15 such that the suspending means are trapped between the edge 18 and the ring element 19 securing them in place.
- the suspending means may be fixed in the attachment tabs by threading them through jamming slots 21 or tying, as described above.
- the optimal lengths of the suspending means 20 are such that the suburethral support 10 passes under the urethra 118 , but exerts no pressure on the urethra 118 unless the bladder 121 is displaced.
- the optimal positioning of the suburethral support 20 is roughly as illustrated in FIG. 14 . When the bladder is displaced, the suburethral support 10 aids closure of the urethra 118 , thus alleviating urinary incontinence.
- a portion of the surgical implant is impregnated with methylene blue, which is a harmless water soluble dye.
- methylene blue is a harmless water soluble dye.
- methylene blue is a harmless water soluble dye.
- methylene blue a harmless water soluble dye.
- cystoscopy should be carried out. If no methylene blue is present, the need for cystoscopy is advantageously obviated.
- Other suitable water-soluble dyes may, of course, be used.
- the surgical implant of the present invention when inserted in the human body, may extend from the rectus sheath 120 , through the paraurethral space 130 on one side of the urethra 118 , around the urethra and back to the rectus sheath 120 on the other side.
- the prior art device comprises a tape 200 that also extends through the abdominal wall 127 and represents a far greater implanted mass.
- the further embodiment of soft tissue anchor illustrated in FIG. 9 for placement in fibro-fatty soft tissue of the retropubic space is placed on an introducing tool.
- An incision 117 is made in the upper wall 116 of the vagina, as shown in FIG. 11 , and the introducing tool 112 is passed through the incision 117 , past one side of the urethra 118 , and located in the fibro-fatty soft tissue and blood vessels of the para-urethral tunnel.
- the surgeon does not introduce the soft tissue anchor as far into the body as described previously and the rectus sheath 120 is not penetrated.
- the surgeon ceases to insert the introducing tool and retracts the introducing tool from the body releasing the projections of the soft tissue anchor 72 .
- the release of the projections 72 of soft tissue anchor by the introducing tool allows the projections to grip the soft tissue surrounding the soft tissue anchor and provide resistance to movement of the soft tissue anchor in a direction opposite to that which it was inserted.
- suspending means 20 are provided, which are held in the soft tissue comprising fibro-fatty tissue and blood vessels.
- suspending means 20 are passed through the attachment tabs of the suburethral support 10 , and the suburethral support 10 positioned such that it passes under the urethra 118 .
- a soft tissue anchor(s) is inserted in and fixed in the soft tissue of the perineum.
- the perineum corresponds to the outlet of the pelvis inferior to the pelvic diaphragm (levator ani and coccygeus).
- the boundaries of the perineum are provided by the pubic arch and the arcuate ligament of the pubis; the tip of the coccyx; and on either side the inferior rami of the pubis ( 140 ) and ischium, and the sacrotuberous ligament.
- a line joining the anterior parts of the ischial tuberosities divides the perineum into two portions, the posterior anal triangle portion and the smaller anterior urogenital triangle.
- 21 is an illustration of the anatomy of the pelvis indicating the pubic symphysis ( 142 ), the inferior pubic ramus ( 142 ), the obturator foramen ( 134 ) and the region ( 138 ) of the obturator foramen though which devices of the prior art extend.
- the surgical implant does not penetrate or extend through the obturator foramen ( 134 ).
- a surgical implant for use in the embodiment of the method wherein the soft tissue anchors are inserted in and anchor in the soft tissue of the perineum may be the same as the implant described in relation to the method of supporting the urethra by anchoring in the tissues of the retropubic space.
- the soft tissue anchors ( 30 ) are provided with glue ( 210 ) for fixation of the implant to the surrounding tissues.
- the implant may be curled or folded around a midline ( 212 ) of a soft tissue anchor ( 30 ) of the implant, and then a tool may be inserted through an aperture ( 214 ) at a first end of the implant ( 216 ) such that the implant can be inserted into the body via a vaginal incision ( 117 ) on an upper wall of a vagina ( 116 ).
- the soft tissue anchor ( 30 ) may be uncurled such that the glue comes into contact with the surrounding tissue to adhere the tissue to the implant.
- the second anchor portion is then inserted through the vaginal incision and suitably located in soft tissue of the perineum on a second side of the urethra ( 118 ).
- the second soft tissue anchor may then be uncurled such that the glue comes into contact with the surrounding tissue to adhere the tissue to the implant.
- the soft tissue anchor portions ( 30 ) can comprise projections, glue or a combination of glue and projections to allow anchorage of the soft tissue anchors in the soft tissue of the perineum.
- a marker may be provided on the implant to aid location of the implant within the body following insertion.
- the marker may be, for example, a protrusion of the suburethral support, or a marked line on the implant.
- Other suitable means provided on the suburethral support to indicate the midpoint of the implant may be provided as would be appreciated to those skilled in the art.
- resilient zones ( 222 ) can be formed from several strip portions conjoined at a first end to the suburethral support and at a second opposite end to soft tissue anchor of the implant.
- these strip portions When not under tension these strip portions are bow shaped and are arranged such that they form a series of alternate and side by side convex and concave strips arranged in substantially the same plane as the implant.
- the implant can show 2-3 mm of extension, as the bowshaped portions of the tape are pulled into straight strips, the ends of the bowshaped strips being brought together, enabling extension of the tape.
- the movement of the strips from the resting bowshape into the tensioned straight strips of implant allows the implant to resiliently extend along its length.
- the maximum length to which the implant can be extended is when the convex and concave strips are pulled such that these strips are brought into alignment with the longitudinal axis of the implant.
- the extended length and the force required to promote extension of the implant can be controlled.
- the ability of the implant to show limited extension following the application of an extending force means that the implant more accurately mimics the movement of dynamic bodily tissue.
- the material of the implant In order that the bowshape like portions of the implant can be pulled such that they are straightened, the material of the implant must be resilient to an extent, The amount of resilience of the material will influence the resilience of the implant to an extending force.
- FIGS. 22, 23 , 26 and 27 illustrate an embodiment of the method wherein the soft tissue anchors are inserted in and fix in the tissue of the perineum. It should be noted that FIGS. 22 and 23 are cross-sections of FIG. 26 , taken along the line A-A.
- the patient is suitably placed in a modified lithotomy position with hips flexed and the legs ( 136 ) elevated.
- a small incision ( 117 ) is made in the upper wall of the vagina ( 116 ) followed by pariurethral dissection.
- a first soft tissue anchor ( 30 ) is inserted through the vaginal incision ( 117 ) and advanced laterally on a first side of the urethra ( 118 ), as illustrated in FIG. 27 , into the tissues of the perineum towards and behind the inferior pubic ramus ( 140 ), but not through, the obturator foramen ( 134 ).
- the length of surgical implant which is to be inserted into the body for anchorage in the soft tissue of the perineum may be indicated by providing a marker on the implant. In an embodiment of a surgical implant for use in this method around 7 cm of the surgical implant is inserted on each side of the urethra.
- the surgical implant and method for anchorage in the soft tissue of the perineum contrasts the devices and methods of the prior art in which the devices are required to be of sufficient length to extend through the obturator foramen ( 134 ) in a “safe” zone ( 138 ) close to the inferior pubic ramus ( 140 ) as illustrated in FIG. 21 and through the skin.
- Provision of an implant capable of anchoring in the soft tissue of the perineum without requiring to pass through the obturator foramen is advantageous as it minimizes the likelihood of anatomical damage to nerves and blood vessels which may occur during procedures which penetrate the obturator foramen.
- a second soft tissue anchor is inserted into said vaginal incision on the second side of the urethra and then advanced in an opposing lateral direction to the first soft tissue anchor, as illustrated in FIG. 27 , into the tissues of the perineum towards, but not through, the obturator foramen ( 134 ).
- a centering marker ( 220 ) provided on the suburethral support is aligned under the urethra such that the first and second anchors are suitably provided into the soft tissue of the perineum.
- the soft tissue anchors are not anchored above the endopelvic fascia ( 139 ).
- this device contrasts that described by the prior art device in that it does not extend through the abdominal wall or the obturator foramen and thus does not represent as much implanted mass.
- the soft tissue anchor may comprise a cone or a half cone such that a circular or semi-circular base is provided as a retaining means to prevent retraction of the soft tissue anchor in a direction opposite to that in which it is inserted into the tissue.
- the soft tissue anchor may comprises a substantially flat or disc shaped head.
- the introducing tool may have a conical head with a sharp point at its apex and a slot for receiving the flat or disc shaped head.
- the soft tissue anchor may be formed of two sections.
- the upper section i.e. the portion of the anchor that forms the sharp point 10
- the upper section may be made from an absorbable material, such as polyglactin such that a sharp point is provided for insertion of the anchor into the body, but this sharp point is later absorbed by the body so as to eliminate any discomfort or disadvantage caused by a sharp pointed object being retained inside the body.
- the soft tissue anchor may be made from metal, such as titanium, as this is a hard material that can easily be formed into the head having the sharp point at its apex, and is sufficiently malleable to provide a tube that may be crimped to the suspending means.
Abstract
Description
- This application is a continuation-in-part of co-pending U.S. patent application Ser. No. 10/510,488 filed Mar. 28, 2005, entitled “Apparatus And Method For Treating Female Urinary Incontinence,” and a continuation-in-part of co-pending U.S. patent application Ser. No. 11/199,061, filed Aug. 8, 2005, entitled “Apparatus And Method For Treating Female Urinary Incontinence,” which is a continuation of U.S. patent application Ser. No. 10/398,992, filed Apr. 11, 2003, entitled “Apparatus And Method For Treating Female Urinary Incontinence,” and which issued as U.S. Pat. No. 6,960,160 on Nov. 1, 2005, the entire contents of each of which are incorporated herein in their entireties.
- This invention relates to an apparatus and method for treating female urinary incontinence and, in particular, to a surgical implant having a sling that passes under the urethra in use and supports the urethra to alleviate incontinence, along with related apparatus and methods for inserting the surgical implant in the body.
- Urinary incontinence affects a large number of women and, consequently, various approaches have been developed to treat female urinary incontinence. Those skilled in the art will be familiar with approaches ranging from pelvic floor exercises to surgical techniques such as Burch colposuspension and Stamey type endoscopic procedures in which the sutures are placed so as to elevate the bladder neck.
- One known procedure positions a sling loosely under the urethra. It is generally understood that this treatment alleviates urinary incontinence by occluding the mid-urethra (for example at a time of raised abdominal pressure by coughing or the like).
- As is known, a sling is provided in the body using two large curved needles which are provided at each end of the sling, where the sling comprises a long mesh or tape. Each of the needles is carried on an insertion tool (which is basically a handle facilitating manipulation of the needles). The mesh or tape is usually made of knitted polypropylene (such as Prolene®). The mesh or tape is generally covered with a plastics sleeve or polythene envelope to aid smooth insertion, the mesh or tape having rough surfaces to aid retention in the body.
- An incision is made in the anterior vaginal wall and the first of the needles is passed through the incision, past one side of the urethra, behind the pubic bone, through the rectus sheath and out through the lower anterior abdominal wall. Likewise, the second needle is passed through the incision, past the other side of the urethra, behind the pubic bone, through the rectus sheath and out through the lower abdominal wall. The needles are separated from their respective insertion tools and also from the mesh or tape such that only the tape and its plastics sleeve are left in the body, passing from a first exit point in the lower abdominal wall, through the rectus sheath, behind the pubic bone, under the urethra, back behind the pubic bone, back through the rectus sheath and out through a second exit point in the lower abdominal wall.
- The plastics sleeve is then removed from the tape and the tape adjusted to a suitable tension (such that the tape provides a sling that passes loosely under the urethra, as described above) by maneuvering the free ends of the tape outside the exit points in the lower abdominal wall whilst the urethra is held using a rigid catheter inserted therein. The tape is then cut such that it just falls short of protruding from the exit points in the lower abdominal wall. The exit points and the incision in the upper vaginal wall are then closed by sutures. The tape is held in position by virtue of friction between the tape's rough edges and the surrounding body tissue (such as the rectus sheath and the body tissue behind the pubic bone) and subsequent natural adhesion of the tape with the body tissue as it re-grows around the mesh material.
- Whilst highly effective in treating urinary incontinence, this procedure has a number of problems. One such problem is that the needles used for inserting the tape are comparatively large, with the needles having, for example, a diameter of around 5-6 mm and a length of around 200 mm. As well as causing concern for patients viewing such needles before or during the procedure (which is carried out under local anesthetic), this can also lead to a high vascular injury rate.
- Similarly, the requirement that the needles exit the lower abdominal wall is disadvantageous due to the trauma to the patient in this area and pain of such abdominal wounds. A further disadvantage is that the tape comprises a relatively large foreign body mass to be retained within the patient and this can lead to related inflammation, infection translocation, erosion, fistula and such like.
- Similarly, the nature of the large needles and tape, along with the tools required to insert these in the body, lead to the procedure having a relatively high cost.
- In another known procedure which may be used to correct urinary incontinence, as shown in
FIGS. 24 and 25 , an incision is made in the perineal skin over a patient'sfirst obturator foramen 134 and anincision 117 is made in the wall of the patient'svagina 116, a surgical instrument is inserted through the cutaneous incision, over thefirst obturator foramen 134 and passed through the obturator foramen (134) at a “safe” zone (138) close to the inferior pubic ramus (140), through the obturator muscle, and through the vaginal incision. A surgical implant is attached to the surgical instrument and the surgical instrument with the implant attached is retracted such that one end of the implant is pulled out of the body via the incision over the obturator foramen. A second incision is provided over the patient's second obturator foramen and the procedure repeated such that the implant is provided under theurethra 118 with a first end of the implant extending out of the first incision made over the first obturator foramen and a second end of the implant extending out of the second incision made over the second obturator foramen. - The requirement that the needles exit the body over the obturator foramen is disadvantageous due to the trauma to the patient in this area and pain of such wounds. A further disadvantage is that the implant comprises a relatively large foreign body mass to be retained within the patient and this can lead to related inflammation, infection translocation, erosion, fistula and such like. Furthermore, anatomical damage to nerves and blood vessels may occur during procedures which penetrate the obturator foramen.
- According to one aspect of the present invention there is provided a surgical implant for supporting the urethra, the implant comprising: a suburethral support suspended between at least two soft tissue anchors attached at either side of the suburethral support, each soft tissue anchor having retaining means for retaining each anchor in tissue and suspending means for suspending each side of the suburethral support from a soft tissue anchor such that the suburethral support passes under the urethra in use.
- In one embodiment, a method of supporting a urethra comprises the steps of: introducing a surgical implant comprising first and second soft tissue anchors and a suburethral support portion therebetween into at least one incision made on the upper wall of a vagina; inserting the first soft tissue anchor on a first side of the urethra behind the pubic bone, and inserting the second soft tissue anchor on a second side of the urethra behind the pubic bone, such that the suburethral support is suspended from the soft tissue anchor and supports the urethra. Each of the first and second soft tissue anchors are inserted in and fix in the soft tissue of the perineum without penetrating the obturator foramen.
- In another embodiment, a method of supporting a urethra comprises the steps of: introducing a surgical implant into at least one incision made on the upper wall of a vagina the surgical implant comprising first and second ends and a suburethral support section therebetween; inserting a first end of the surgical implant on a first side of the urethra and positioning the first end into soft tissue of the perineum without penetrating the obturator foramen; and inserting a second end of the surgical implant on a second side of the urethra and positioning the second end into the soft tissue of the perineum without penetrating the obturator foramen such that the suburethral support section is positioned under the urethra and provides support thereto.
- In another embodiment, a method of supporting a urethra comprises: mechanically coupling, with a surgical implant, a first soft tissue portion of a perineum on a first side of the urethra to a second soft tissue portion of the perineum on a second side of the urethra, wherein the urethra is positioned between the first and second tissue portion, and orientating a portion of the surgical implant underneath the urethra to provide support thereto, wherein the obturator foramen is not penetrated.
- In an embodiment of the surgical implant of the present invention the soft tissue anchor is capable of anchoring in the soft tissue of the perineum.
- Preferably the soft tissue anchors comprise soft tissue anchors capable of anchoring in tissue of the retropubic space and/or tissue of the perineum at multiple points via a Christmas tree type configuration of deflectable wings.
- A soft tissue anchor according to these embodiments comprises a central portion and the retaining means includes a plurality of projections the projections extending radially from the central portion along a substantial portion of the length of the central portion allowing fixation at a plurality of layers.
- Preferably the projections extend radially from the central portion at an angle inclined toward the second end of the central portion.
- Preferably the projections are of a shape that they are able to provide additive traction to the soft tissue anchor and allow it to grip fibro-fatty soft tissue and blood vessels of the para-uretheral tunnel below the level of the rectus sheath and/or the soft tissue of the perineum.
- In a preferred embodiment of the surgical implant the retaining means are moveable from an inserting position to a retaining position.
- It is preferable if at least one of the retaining means of the implant is moveable from a collapsed position to an extended position as it enables the retaining means to actively move into tissue in at least one layer of the tissue following suitable location of the implant. The movement of the retaining means from a collapsed position to an extended position allows the means to move into and be retained in tissue which has been undisturbed or which has not been disrupted during placement of the implant. The collapsed position of the implant can be achieved by rolling up, folding, bending, or enclosing the implant in a restrained position.
- It is more preferable if the retaining means can be moved from a collapsed position to an extended position at two or more layers in the tissue as this provides for gripping of the tissue by the implant at multiple sites which may require increased force to be used to dislodge the soft tissue anchors of the implant from the anchored positions in the fibro-fatty soft tissue of the retropubic space or from the soft tissue of the perineum.
- Suitably the retaining means may be at least one projection which can project from the implant into the tissues of the retropubic space or the soft tissue of the perineum in at least one plane the projection being moveable from a collapsed position to an extended position.
- In particular embodiments of the implant the retaining means comprise a plurality of projections extending laterally from the longitudinal axis of the implant.
- Suitably the projections may extend from the longitudinal axis of the implant such that they point away from the bladder when the implant is positioned such that the suburethral support passes under the urethra.
- In particular embodiments of the implant the projections may be curved such that they point away from bladder when the implant is positioned such that the suburethral support passes under the urethra.
- In particular embodiments of the implant, the implant may be curved such that the longitudinal edges of the soft tissue anchors of the implant and thus the retaining means in use are directed away from the bladder.
- In embodiments of the surgical implant wherein the retaining means are mechanical in nature in an inserting position the mechanical means are collapsed and in a retaining position the mechanical retaining means are in an extended position.
- In embodiments of the surgical implant wherein the retaining means are chemical in nature, for example glue, in an inserting position the glue is in a state which minimizes its adhesion to the surrounding tissue and in a retaining position the glue is in a state which allows the glue to adhere to the surrounding fibro-fatty tissue in the retropubic space or in the soft tissue of the perineum. Thus in moving from an inserting position to a retaining position the presentation or the nature of the glue is changed to cause the glue to adhere the implant to the surrounding tissue.
- The glue may be encapsulated (inserting position) within a capsule such that the glue cannot interact with the tissue during placement of the implant. When the implant is suitably located, the capsule of glue may be burst (retaining position) to release the glue and allow the implant to be fixed to the surrounding tissue.
- In particular embodiments the glue is held in a releasable container. The glue containing releasable container may prevent the glue interacting with surrounding tissues until an appropriate point in the surgical procedure. At this point the surgeon may use means, for example a point on the introducing tool to release the glue from the container, for example by puncturing the container and enabling the glue to adhere the implant to the surrounding tissue.
- Alternatively in particular embodiments of the implant the glue may be activated by some means, for example heat, light, cold or ultrasound. The implant may be moved into the fibro-fatty tissue of the retropubic space or the soft tissue of the perineum without the glue adhering the implant to the surrounding tissue (inserting position) then following the activation of the glue or change in state of the glue by some means, not limited to heat, light, cold or ultrasound, the glue will adhere the implant to the surrounding tissues (retaining position).
- It is preferable if the implant has minimal mass to reduce the likelihood of inflammation or rejection of the implant when it is located in the body. Further, it is preferable that the implant comprises as little material as allows support of the urethra during periods of increased intra-abdominal pressure to minimize the abrasion or the urethra and the likelihood of adhesions forming at the urethra.
- In addition, it is advantageous if the tissue anchors and the suburethral support are integral with each other as it allows easier manufacture of the implant. As the distance from the supporting region under the urethra to the fixing points in the fibro-fatty tissue of the retropubic space and/or in the soft tissue of perineum are relatively short in comparison to the distances between the suburethral support and the fixing points described in the implants of the prior art, the overall size of the implant of the present invention can be reduced.
- The production of an implant from a portion of tape material is advantageous as it allows easier manufacture than implants comprising multiple portions comprising of different materials which have to be fixed together. This design minimizes the risk of failure of the implant due to the simplicity of the implant and provides for easier packaging and sterilization of the implant.
- The soft tissue anchors of the implant must be anchored in the tissues of the retropubic space or the tissue of the perineum with adequate tensile strength to counter dislodging by coughing until suitable integration of tissue occurs with the implant.
- At least two forces are exerted on the surgical implant portion which extends under the urethra. A first force is the force exerted by the urethra during increased intra-abdominal pressure. The surgical implant has to be secured in the fibro-fatty tissue of the retropubic space or the soft tissue of the perineum such that it is capable of supporting the urethra and occluding the urethra at periods of increased intra-abdominal pressure, to minimize incontinence.
- A second force is the force exerted on the surgical implant during periods of increased intra-abdominal pressure which acts in a direction opposite to the direction in which the anchors are inserted into the retropubic space or the soft tissue of the perineum. This force can be considered to be a force of dislodgement.
- Suitably the implant is anchored in the fibro-fatty tissues of the retropubic space and/or the soft tissue of the perineum such that the implant can resist forces of dislodgement created during periods of increased intra-abdominal pressure.
- Coughing and other causes of increased abdominal pressure typically cause increased pressures of around 200-400 cm water. This has been determined by the Applicant to be equivalent to around a force of 3.75 N through each tape arm.
- Suitably the implant is anchored in the fibro-fatty tissues of the retropubic space or soft tissue of the perineum such that the implant can resist forces of dislodgement created during periods of increased intra-abdominal pressure of up to 3 N.
- In particular embodiments, the implant may be anchored in the fibro-fatty tissues of the retropubic space or soft tissue of the perineum such that the implant can resist forces of dislodgement of up to 5 N.
- In further embodiments the implant may be anchored in the fibro-fatty tissues of the retropubic space or soft tissue of the perineum such that it can resist forces of dislodgement of up to 10 N.
- In embodiments of the implant a soft tissue anchor may comprise a plurality of retaining means.
- In embodiments of the implant a soft tissue anchor may be tapered.
- Curvature of the longitudinal edges of the soft tissue anchor such that they are directed away from the bladder minimizes medial presentation of the retaining means such as projections to the bladder minimizing erosion of the bladder.
- In a particular embodiment of the implant a soft tissue anchor may be shaped as a serrated arrowhead wherein the base portion of the arrowhead is conjoined to the suburethral support.
- The serrated arrowhead may be provided by cutting a flat tape such that the serration's of the arrowhead exist in two dimensions only.
- Suitably the soft tissue anchor may have a pointed end at a first end, a base portion at a second end, wherein the longitudinal edges extend between the pointed end and the base and the longitudinal edges are notched to provide a row of projections extending outward from the longitudinal edges.
- In other words the anchor may have a pointed tip at a first end and a base portion at a second end, the first end being the end of the anchor furthest from the suburethral support and the base portion being conjoined to the suburethral support. The longitudinal edges of the anchor extend from the pointed tip to the base wherein the longitudinal edges are notched to from a row of tooth like projections extending from the longitudinal edge.
- In yet a further embodiment the soft tissue anchor may comprise a substantially flat head the bottom surface nearest the suspending means of the flat head providing the retaining means which, in use is held in the rectus sheath.
- In a further embodiment the soft tissue anchor may comprise a sharp point allowing it to pierce or penetrate the rectus sheath, and retaining means comprising a surface or protrusion directed rearwardly with respect to the sharp point which does not cause the soft tissue to part and thus prevents the soft tissue anchor from being pulled back out through the rectus sheath soft tissue in the direction opposite to that in which it is inserted into the soft tissue.
- Preferably the sharp point is provided by the apex of a conical head portion and retaining means are provided by a substantially flat base of the conical head.
- Suitably a soft tissue anchor as described herein for anchoring into the fibro-fatty tissues of the retropubic space may be used to anchor in the soft tissue of the perineum.
- In any embodiment the soft tissue anchor may be comprised of plastics material.
- Typically the soft tissue anchor may be comprised of polypropylene.
- Alternatively the soft tissue anchor is comprised of absorbable material so as to form temporary fixation in soft tissue.
- The soft tissue anchor may comprise a point formed of absorbable material including polyglactin, the sharp point thus capable of facilitating insertion of the anchor, yet being absorbed by the body later.
- Preferably the soft tissue anchor may be integral with the suspending means.
- More preferably the soft tissue anchor is integrally formed from polypropylene or other polymeric material the attachment between the anchor and the suspending means being formed as a single unit.
- An integral construction of the soft tissue anchor and suspending means has the advantage of simplifying the construction of the soft tissue anchor and suspending means, which can reduce the possibility of defective manufacture etc. and reduce costs and the chance of the soft tissue anchor and suspending means becoming detached once implanted in the body.
- Alternatively the soft tissue anchor is attached to the suspending means by a thin metal tube crimped or otherwise attached around the suspending means and central portion of the soft tissue anchor.
- The suburethral support of the first aspect of the invention passes under the urethra, loosely supporting the urethra, the suburethral support being held in position by suspending means attached to each of its free ends on either side of the urethra, the suspending means being attached at the opposite end to at least one soft tissue anchor.
- Preferably the suburethral support is comprised of flat polymer tape.
- Preferably the suburethral support has dimensions sufficient only to pass around the urethra.
- More preferably the suburethral support has dimensions of length 15-35 mm, width 5-15 mm and thickness 50-350 mm.
- In one embodiment the suburethral support has dimensions of
length 25 mm,width 10 mm and thickness 100 mm. - Preferably the suburethral support has at least two junctions to attach the suburethral support to the suspending means.
- Preferably the distance between the soft tissue anchor(s) and the suburethral support is adjustable.
- The surgical implant is preferably of a length in the range 12 cm to 16 cm.
- More preferably the soft tissue anchor (or anchors) can be positioned first and the suburethral support then positioned by adjusting the length of the suspending means.
- Preferably the suburethral support is provided with at least one attachment tab to which suspending means are releasably or permanently attached.
- In particular embodiments of the surgical implant the suburethral support is provided by a mesh. Advantageously when the suburethral support is provided by a mesh, the mesh is resilient to such an extent that it mimics the physiological elasticity of the tissues which would normally support the urethra.
- In embodiments of the implant wherein the suburethral support is formed from mesh the strands of the mesh may be spaced apart to form spaces of 1 to 10 mm. Suitably the strands may have a diameter of less than 600 mm. Suitably the strands of the mesh may be arranged to form a warp knit diamond or hexagonal net mesh.
- In particular embodiments of the implant the suburethral support may be formed from polyester or polypropylene. Alternatively, the suburethral support may be formed from absorbable material or may be encapsulated by an absorbable coating. In particular embodiments, such a coating may be applied to only one side of the implant.
- In further embodiments the suburethral support may be formed from biocomponent microfibres comprising a core and surface material. For example, the surface material may be readily absorbable by the body while the core material may remain in the body for a longer period of time. Suitably the surface material may be polylactic acid and the core material may be polypropylene.
- The suburethral support of the implant may be absorbable at a different rate than the soft tissue anchors of the implant, for example the soft tissue anchors may be absorbed within six weeks of implantation, while the soft tissue anchors may remain for 9 months.
- Preferably the suburethral support comprises an attachment tab comprising a tunneled element and an aperture, the tunneled element being located at each of the free ends of the suburethral support on either side of the urethra at a position that the suspending means are capable of being introduced through, the tunneled element co-operating with the aperture such that suspending means can be passed through the tunneled element and then through the aperture, the aperture being present on the opposite surface of the suburethral support to that which contacts the urethra the aperture having an edge capable of co-operating with a ring element and the ring element being capable of being fitted around the aperture trapping the suspending means between the ring element and the edge of the aperture such that the suspending means remain fixed in an adjusted position wherein the suburethral support hangs loosely under the urethra.
- Alternatively the attachment tab comprises at least one slot through which suspending means can be passed, the suspending means being permanently attached to the slot by tying.
- Alternatively the attachment tab comprises jamming slots that the suspending means can be permanently attached by being threaded through the jamming slots such that the suspending means are held in an adjusted position.
- Alternatively the suburethral support is capable of being suitably positioned under the urethra by altering the position of the soft tissue anchors within the body such that at least one soft tissue anchor is secured in the soft tissue or in the rectus sheath and a subsequent anchor is inserted into the soft tissue or rectus sheath to a suitable depth such that the suburethral support hangs loosely under the urethra.
- Alternatively the suspending means may be attached to the suburethral support by heating such that the suburethral support and/or suspending means melt and form a join.
- Alternatively the attachment tabs may have closure means for gripping the suspending means.
- The suspending means may be any means suitable for connecting each end of the suburethral support to the soft tissue anchor (or respective soft tissue anchors).
- Preferably the suspending means comprises a plastics strip.
- Preferably the plastics strip has smooth edges.
- Preferably the plastics strip comprises material such as polypropylene or other suitable non-absorbable or absorbable polymer tape.
- Preferably the plastics strip is 3-5 mm in width.
- Preferably the plastics material comprises pores which extend through the plastics material from a first surface of the plastics material to a second opposite surface of the plastics material said pores ranging in width across the surface of the plastics material from 50 mm to 200 mm, the pores allowing tissue in-growth to secure the strip in the body.
- Alternatively the plastics material may comprise pits, that indent but do not extend through the plastics material, on at least one of the surfaces of the plastics material, the pits ranging in width from 50 mm to 200 mm, the pits allowing tissue in-growth to secure the strip in the body.
- Preferably the plastics material comprises pits or pores ranging in width across the surface of the plastics material from 100 mm to 150 mm.
- Preferably the pits or pores are distributed across the complete surface of the plastics material.
- Alternatively the pits or pores are distributed only in a particular portion of the surface of the plastics material.
- Preferably the pits or pores are created by post synthesis modification of the plastics material.
- More preferably the pits or pores are created by post synthesis treatment of the plastics material by a laser.
- Alternatively the pits or pores of between 50-200 mm are created during synthesis of the plastics material by spaces between the waft and weave of mono-filament or multi-filament yarns when the filaments are woven to form a mesh.
- Alternatively pits or pores formed during the synthesis of plastics material are formed by the inter-filament spaces created when mono-filaments are twisted to create multi-filaments, the multi-filaments then being woven to form a mesh.
- In an embodiment the suspending means is provided with a plurality of microgrooves of width between 0.5-7 μm and of depth 0.25-7 μm on at least one surface of the plastics strip.
- Preferably the microgrooves are 5 μm in width and 5 μm in depth.
- Preferably the plurality of microgrooves are aligned such that they are substantially parallel with each other.
- Preferably the plurality of microgrooves are aligned such that they are separated by ridges which range in size between 1-5 μm in width.
- More preferably the microgrooves are separated by ridges of 5 μm in width.
- Preferably the ridges are formed by square pillars and the base of the microgroove is substantially perpendicular to the square pillars.
- Alternatively the ridges are formed by square pillars and the base of the microgroove is beveled in relation to the pillars.
- Preferably the microgrooves are present on at least one surface of the suspending means.
- More preferably the microgrooves are present on a plurality of surfaces of the suspending means.
- These microgrooves act to orientate and align the proliferating fibroblasts on the surface of the plastics material and cause axial alignment of collagen fibres and formation of at least one strong ordered neoligament.
- The orientation and alignment of the proliferating cells is capable of adding mechanical strength to the tissue which forms around the plastics material such that it is more able to support the urethra.
- Preferably the suburethral support of the present invention has neither pores, pits or grooves to discourage the formation of peri-urethral adhesions.
- Suitably the implant may be comprised of non-absorbable material. Alternatively the implant may be comprised of absorbable material. In particular embodiments of the implant, the implant is comprised of polypropylene.
- Preferably the implant is comprised of resilient material such that if the implant is not restrained it adopts the original shape defined during production of the implant.
- It would be advantageous if the implant was capable of longitudinal extension such that it still provides suitable support to the urethra during periods of increased abdominal pressure, but is able to move and extend in a similar fashion to tissues which physiologically support the urethra.
- In suitable embodiments of the implant, there may be provided a resilient zone wherein the resilient zone provides for the resilient extension of the surgical implant in a longitudinal direction such that the surgical implant behaves in a similar manner to dynamic bodily tissue.
- In particular embodiments of the implant the resilient zone is located in at least one of the anchors of the implant.
- Alternatively the resilient zone is interposed between an anchor and the suburethral support.
- The resilient zone of the implant may be capable of allowing the resilient extension of at least part of the implant due to its geometric design.
- Alternatively the resilient zone of the implant may be capable of allowing resilient extension of at least part of the implant due to its micro material design.
- In particular embodiments of the implant, the resilient zone of the implant may be capable of allowing the resilient extension of the implant due to a combination of its geometric and micro material design.
- The geometric design may include multiple strips of material.
- In particular embodiments the geometric design may include multiple strips of material arranged into bows, the bows being capable of deforming and providing resilient extension to the implant.
- Alternatively the geometric design may comprise a concertina portion such that a part of the implant can extend in a direction substantially perpendicular to the folds of the concertina.
- In other words the implant may comprise a folded portion, the fold perpendicular to the longitudinal axis of the implant, which allows limited extension of the implant in a longitudinal direction. In an extended position a folded portion is moved away from a second folded position. In a closed portion the folded portions are brought together. Different amounts of force in a longitudinal direction may be required to move the concertina portion from a closed to an open position.
- Suitably resilient extension of a portion of the implant may occur when an extension force of 1 to 5 N is applied to the implant along its length.
- Resilient extension of a portion of the implant may occur when an extension force of 2 to 3 N is applied to the implant along its length.
- The resilient zone may provide for the extension of the implant along its longitudinal length of around 2 to 5 mm.
- In embodiments of the surgical implant the unextended implant may be of length 6 to 22 cm.
- More preferably the unextended implant is of length 8 to 20 cm.
- Most preferably the surgical implant is of
unextended length 10 to 15 cm. - It will be understood that in embodiments of the implant which do not include a resilient zone, the unextended length is equal to the length of the implant.
- In particular embodiments of the implant each soft tissue anchor is of at least 1 cm in length and not greater than 8 cm in length.
- Suitably each anchor may be 5 cm in length.
- Suitably the suburethral support may be of at least 2 cm in length.
- According to a second aspect of the present invention there is provided a method of supporting the urethra comprising the steps of, introducing a surgical implant as described above into an incision made on the upper wall of the vagina, inserting a soft tissue anchor on a first side of the urethra behind the pubic bone, inserting a second soft tissue anchor on a second side of the urethra behind the pubic bone, such that the suburethral support is suspended from the soft tissue anchor and supports the urethra.
- The invention also provides the use of the method of supporting the urethra in treating urinary incontinence or uterovaginal prolapse.
- In one embodiment of the method the soft tissue anchors are inserted in the rectus sheath.
- In an alternative embodiment of the method the soft tissue anchors are inserted in the fibro-fatty soft tissue of the retropubic tissue space and do not penetrate the rectus sheath.
- In an alternative embodiment of the method the soft tissue anchors are inserted in and fix in the soft tissue of the perineum.
- As indicated above, the above methods have the advantage that only a single vaginal incision is required for introduction of the surgical implant and the need for exit of the surgical implant and thus exit wounds is removed, for example exit wounds in the abdomen or at the obturator foramen are not required.
- In particular embodiments of the method wherein the soft tissue anchors are inserted in and fix in the soft tissue of the perineum, the surgical implant does not penetrate the endopelvic fascia.
- In none of the embodiments of the method does the surgical implant penetrate of extend through the obturator foramen.
- Suitably in one embodiment of the method wherein the soft tissue anchors are inserted and fix in the soft tissue of the perineum there is provided a method of supporting the urethra comprising the steps of: introducing a surgical implant comprising first and second soft tissue anchors and a suburethral support therebetween into at least one incision made on the upper wall of the vagina, inserting a first soft tissue anchor on a first side of the urethra in a lateral direction away from the urethra, inserting a second soft tissue anchor on a second side of the urethra in an opposite lateral direction from the first soft tissue anchor and away from the urethra, such that the suburethral support is suspended from the first and second soft tissue anchors and supports the urethra, wherein each of the first and second soft tissue anchors is positioned in the soft tissue which comprise the perineum.
- In another embodiment a method of supporting the urethra comprises the steps of: introducing a surgical implant into at least one incision made on the upper wall of the vagina the surgical implant comprising first and second ends and a suburethral support section therebetween; inserting a first end of the surgical implant on a first side of the urethra and positioning the first end into the soft tissue of the perineum without penetrating the obturator foramen; inserting a second end of the surgical implant on a second side of the urethra and positioning the second end into the soft tissue of the perineum without penetrating the obturator foramen such that the suburethral support section is positioned under the urethra and provides support thereto.
- In a further embodiment the method of supporting a urethra, comprises the steps of: introducing a first end of a surgical implant into at least one incision made in a vaginal wall, the surgical implant comprising first and second ends and a suburethral portion there between; inserting the first end of the surgical implant on a first side of the urethra and positioning the first end into tissue of a perineum without penetrating the endopelvic fascia; introducing the second end of a surgical implant into the at least one incision made in a vaginal wall; inserting a second end of the surgical implant on a second side of the urethra and positioning the second end into tissue of the perineum without penetrating the endopelvic fascia such that the suburethral support portion is positioned underneath the urethra and provides support thereto.
- Suitably a portion of the surgical implant grips at least one of first and second soft tissue portions of the perineum.
- Suitably location of a first soft tissue anchor on a first side of the urethra in a first tissue of a perineum and a second soft tissue on a second side of the urethra in a second tissue of the perineum, wherein the urethra is positioned between said first and second soft tissue portions and the surgical implant is positioned underneath the urethra to provide support thereto, mechanically couples a first tissue of the perineum to the second tissue of the perineum.
- In this method no part of the surgical implant penetrates the obturator foramen. In particular, no part of the surgical implant extends through the obturator foramen.
- The soft tissue anchor(s) or ends do not penetrate or fix into bone.
- In one embodiment of the method of anchoring the soft tissue anchors in the soft tissue of the perineum, a soft tissue anchor of an implant is inserted through an incision in an upper wall of a vagina and inserted towards a first obturator foramen behind an inferior pubic ramus until about half of the length of the implant is inserted. The soft tissue anchor of the implant is thus placed such that the soft tissue anchor is located in the soft tissue of the perineum. A second soft tissue anchor may then be inserted into the vaginal incision and inserted towards a second obturator foramen behind an inferior pubic ramus until the second half of the implant is inserted. The second soft tissue anchor of the implant is thus placed such that the soft tissue anchor is located in the soft tissue of the perineum.
- In an embodiment of the method a first end of a surgical implant may be inserted through an incision in an upper wall of a vagina and inserted towards a first obturator foramen behind an inferior pubic ramus such that around 7 cm of the implant is inserted. A second end of a surgical implant may then be inserted through an incision in an upper wall of a vagina and inserted towards a second obturator foramen behind an inferior pubic ramus such that around 7 cm of the implant is inserted.
- The locating of a soft tissue anchor in the soft tissue of the perineum may be advantageous as it is less likely that the bladder may be perforated than in retropubic methods where the needle passage is medial and therefore near to the bladder.
- Typically the suburethral support is placed midurethra, without tension, but in a position to support the urethra. However, as will be understood by those skilled in the art, the suburethral support may be positioned at an alternative suitable anatomical location such as to be therapeutically effective should for example the midurethra be damaged or have significant scar tissue.
- In an embodiment of the method, the soft tissue anchors do not penetrate the obturator muscle.
- The above and further advantages of the invention may be better understood by referring to the following description in conjunction with the accompanying drawings in which:
-
FIG. 1 is an illustration of a surgical implant for anchoring in the rectus sheath, -
FIGS. 2 a and 2 b are line drawings of the suspending means attached to the suburethral support, positioned underneath the urethra, -
FIG. 3 is an illustration of one embodiment of a suburethral support, -
FIG. 4 is an illustration of a second embodiment of a suburethral support, -
FIG. 5 shows suspending means being threaded through an attachment tab of a suburethral support, -
FIGS. 6A , B and C show alternative methods of attaching suspending means to a suburethral support, -
FIGS. 7A, 7B and 7C are illustrations of a soft tissue anchor for insertion through the rectus sheath, - FIGS. 8A-C are sequential illustrations of insertion of a soft tissue anchor of
FIG. 7 , -
FIG. 9 is an illustration of a soft tissue anchor mounted on an introducing tool for insertion through the rectus sheath, -
FIG. 10 is an illustration of a retropubic soft tissue anchor for use in the fibro-fatty tissues of the para-urethral tunnel, -
FIG. 11 is an illustration of the placement of a soft tissue anchor ofFIG. 10 , -
FIG. 12 is an illustration of an implanting tool and a soft tissue anchor inserted into the rectus sheath, -
FIG. 13 is an illustration of the surgical implant implanted into the rectus sheath, -
FIG. 14 is an illustration of the prior art contrasted with the technique wherein the anchor is inserted in the rectus sheath, -
FIG. 15 is an illustration of the tool used to insert the surgical implant, -
FIG. 16 is an illustration of the surface architecture of the suspending means, -
FIG. 17 illustrates a diagrammatic side view of an embodiment of an implant with portions of glue provided on the soft tissue anchors, -
FIG. 18 (a) illustrates an embodiment of an implant comprising a suburethral support formed from mesh, -
FIG. 18 (b) is a further illustration of the embodiment of the implant ofFIG. 18 (a), -
FIG. 19 is an embodiment of an implant comprising resilient zones, -
FIG. 20 illustrates a diagrammatic view of an implant wherein the soft tissue anchors are provided with grooves and pores and portions of glue, -
FIG. 21 is a diagrammatic representation of the anatomy of the pelvic region illustrating the obturator foramen, inferior pubic ramus, pubic symphysis and the safe transorbturator exit zone as used in prior art methods, -
FIG. 22 is a cross-section illustration ofFIG. 26 that illustrates insertion of an embodiment of a surgical implant wherein the soft tissue anchors are fixed in the soft tissue of the perineum, -
FIG. 23 is a cross-section illustration ofFIG. 26 that illustrates an embodiment of a surgical implant wherein the soft tissue anchors are fixed in the soft tissue of the perineum, -
FIG. 24 illustrates a prior art device anchored in the skin above the obturator foramen, -
FIG. 25 illustrates a prior art device anchored in the skin above the obturator foramen, -
FIG. 26 illustrates placement of an embodiment of a surgical implant in the soft tissue of the perineum without insertion into the obturator foramen wherein the implant is in the body, -
FIG. 27 illustrates placement of an embodiment of a surgical implant in the soft tissue of the perineum without insertion through the obturator foramen, -
FIG. 28 illustrates an embodiment of a surgical implant comprising a marker on the suburethral support and soft tissue anchors comprising projections and glue, and -
FIG. 29 illustrates a further embodiment of a surgical implant comprising a marker on the suburethral support. - Referring to
FIG. 1 , a surgical implant for treating female urinary incontinence has asuburethral support 10, suspendingmeans 20 and at least two soft tissue anchors 30, thesuburethral support 10 being positioned in use, loosely under the urethra. The suburethral support has a length L of around 25 mm and a width W of around 10 mm such that it passes around the urethra with a minimum of excess material, although other similar dimensions would also be suitable. In this example, thesuburethral support 10 is made from flat polymer tape. At each side 11,13 of thesuburethral support 10 suspendingmeans 20 are provided which attach to thesuburethral support 10 at afirst end - The suspending means 20 are attached at a
second end 26 to a respectivesoft tissue anchor 30. - As shown in
FIGS. 7 a-7C, thesoft tissue anchor 30 of the embodiment described comprises acentral portion 32 and fourwinged sections 34 which are attached to the central portion at afirst end 38 by resilient hinge means 36 and radially extend from thecentral portion 32 such that when viewed from the front the anchor device resembles a cross. - As shown in
FIG. 8A thewing sections 34 of thesoft tissue anchor 30 having a resting position in which they are inclined towards the rear 40 of thecentral portion 32 at an angle of around 45°. InFIG. 8B during penetration of the anchor through tissue (thepoint 60 of the introducing tool enabling the soft tissue anchor to be pushed through the tissue and rectus sheath 120) thewing sections 34 of thesoft tissue element 30 may adopt a deflected position which means the penetration of the soft tissue anchor through the tissue andrectus sheath 120 is more effective. - As shown in
FIG. 8C once therectus sheath 120 has been pierced the resilient hinge means 36 cause thewing sections 34 to return to their resting position. - Movement of the soft tissue anchor in a direction opposite to which it was introduced into the soft tissue causes the wing section to be deflected until an endstop 46 is reached which prevents the
wing sections 34 moving beyond a point substantially perpendicular to thecentral portion 32 and prevents retraction of thesoft tissue anchor 30 from the soft tissue. - The
soft tissue anchor 30 further comprises ahollow portion 48 which extends from thefirst end 38 to the secondrear end 40 of thecentral portion 32 through which an introducingtool 50 may be placed, as shown inFIGS. 8A-8C . - The introducing
tool 50 extends through thehollow portion 48 such that it extends as asharp point 60 from thefirst end 38 of thesoft tissue anchor 30 such that thesharp point 60 allows penetration of the tissue by thesoft tissue anchor 30. - Stud like
projections 42 which extend radially from thecentral portion 32 are angled such that they extend further radially from thecentral portion 32 as they extend towards the rear 40 of thecentral portion 32, this inclination allowing thesoft tissue anchor 30 to pass more easily into the soft tissue. - A recessed
portion 44 is positioned toward therear end 40 of thecentral portion 32 to facilitate attachment of the suspending means 20 to thesoft tissue anchor 30. - The suspending means 30 may be respectively attached to the
soft tissue anchor 30 at this recessedpoint 44 by crimping a tube around the suspending means 20 to fix the suspending means 20 to thesoft tissue anchor 30. - In the embodiment shown the soft tissue anchor may be suitably positioned in the
rectus sheath 120 using an introducingtool 50. As shown inFIG. 15 thetool 50 comprises ahandle 52 andelongate body 54. Theelongate body 54 is curved through an angle of approximately 30° to facilitate positioning of thesoft tissue anchor 30 in the rectus sheath or surrounding soft tissue of the human body from an incision in the upper wall of the vagina (as described below). Thesoft tissue anchor 30 is located on the elongate body at a narrowedportion 58 of the introducing tool such that the soft tissue anchor is held in place by anabutment 56 such that the narrowedportion 58 may extend through thehollow portion 48 of thesoft tissue anchor 30 such that thepoint 60 of theinsertion tool 50 protrudes from thefirst end 38 of the soft tissue anchor and allows the soft tissue anchor to be inserted into the human body through the soft tissues and more specifically through therectus sheath 120 during the placement of the soft tissue anchor. - The placement of the
soft tissue anchor 30 on theinsertion tool 50 is shown inFIGS. 8B and 8C , which shows thesoft tissue anchor 30 being pushed through soft tissue fascia, such as therectus sheath 120. Once the soft tissue anchor has penetrated therectus sheath fascia 120, as shown inFIG. 8B , the introducingtool 50 can be withdrawn, as shown inFIG. 8C , leaving thesoft tissue anchor 30 in place. - As shown in
FIG. 10 the soft tissue anchor may alternatively be comprised of acentral portion 70 and a plurality ofprojections 72 the projections extending radially from thecentral portion 70 and arranged along a substantial portion of the length of thecentral portion 70. Theprojections 72 may be of any shape such that they provide resistance within the fibro-fatty soft tissue and blood tissues of the para-urethral tunnel in the direction opposite to that in which the soft tissue anchor is introduced. - This resistance is also provided by the multiple layers, typically between 5-10 layers of
projections 72 which extend from thecentral portion 70. - Using these multiple layers of
projections 72 it is not necessary to insert the soft tissue anchor through therectus sheath 120. Instead the soft tissue anchor should be positioned as high in the retropubic space as possible in the fibro-fatty soft tissue. - In embodiments of the anchors suitable for anchoring in the soft tissue of the perineum, the soft tissue anchors may be provided with projections which allow penetration of the soft tissue of the perineum and which provide resistance to removal of the anchors from the soft tissue of the perineum.
- In the embodiment of the method wherein the anchors are anchored in the soft tissues of the perineum, an embodiment of an anchor comprises multiple layers of
projections 72. The multiple layers of projections enable the anchors to be fixed in the soft tissue of the perineum with suitable fixation without requiring the extending through the obturator foramen. - In the embodiment of the soft tissue anchor comprising multiple layers of
projections 72 which resembles a Christmas tree, as shown inFIG. 10 , the introducing tool comprises a collar which releasably retains the projections during insertion into the retropubic space. The collar may comprise a semi-sharp beveled needle. Following insertion of the Christmas tree like anchor into the fibro-fatty soft tissue of the retropubic space the introducing tool is withdrawn removing the collar from around the plurality ofprojections 72 of the soft tissue anchor, which due to their memory expand outwards from thecentral portion 70 and grip the fibro-fatty soft tissue of the retropubic space at multiple layers. The collar of the introducing tool which extends around the soft tissue may contain a cross-sectional opening such that once the tool is withdrawn the collar may be removed from the surgical implant by passing the implant through the cross-sectional opening. - Accordingly the invention also provides an introducing tool for use in inserting the soft tissue anchor.
- Suspending means 20 attached to the soft tissue anchors are formed from a strip of plastics material such as polypropylene which is sufficiently soft to avoid damaging the urethra or surrounding body tissue and suitably inert such that it can be left in the human body for a long period of time without causing adverse reactions. Again, other suitable materials will be apparent to those skilled in the art.
- The polypropylene mesh strip of 3-5 mm in width which forms the suspending
means 20 has smooth edges to avoid adhesion of the soft tissue to the strip, reducing problems associated with leaving foreign material in the human body for long periods of time. - As shown in
FIG. 16 the polypropylene mesh strip further comprises pores or pits 80 ranging in width across the surface of the strip from 50mm to 200 mm, which extend through the strip from a first surface of thestrip 26 to a secondopposite surface 28 of the strip thepores 80 allowing tissue in-growth to secure the suspending means 20 in the body. - The
pores 80 are created by post synthesis treatment of the polypropylene mesh material by a laser. - The polypropylene mesh which forms the suspending
means 20 also comprisesmicrogrooves 82 of width 5 μm and of depth 5 μm on the surfaces of the polypropylene mesh. - The
microgrooves 82 are aligned such that they are substantially parallel with each other and separated by ridges of around 5 μm in width. - The ridges are formed by square pillars the base of the microgroove being substantially perpendicular to the square pillars or beveled in relation to the pillars. The
microgrooving 82 being present on both surfaces of the suspending means to orientate and align the proliferating fibroblasts on the surface of the plastics material and cause axial alignment of collagen fibres and formation of at least one strong ordered neoligament. - This orientation and alignment of the proliferating cells adding mechanical strength to the tissue which forms around the plastics material such that it is more able to support the urethra.
- The suburethral support is not provided with pores, pits or grooves to discourage the formation of peri-urethral adhesions.
- Once the soft tissue anchors have been suitably positioned in either the soft tissue of the para-urethral tunnel or through the
rectus sheath 120 the length of the suspending means 20 can be altered such that thesuburethral support 10 hangs loosely under the urethra. - As shown In
FIGS. 2 a and 2 b the suspendingmeans 20 are attached at afirst end suburethral support 10, which extend on either side of the urethra. - As shown in
FIGS. 6 a-6 c a preferred method of altering the length of the suspending means 20 attached to thesuburethral support 10 comprises a tunneledelement 25 at each of the free ends 22,24 of thesuburethral support 10 on either side of the urethra. The tunneledelement 25 extends from the edges of thesuburethral support 10 to anaperture 15, the aperture being present on theopposite surface 16 of thesuburethral support 10 to the surface which contacts theurethra 17, theaperture 15 having anedge 18 able to co-operate with aring element 19 such that the ring element which has memory can be pushed onto theedge 18 of theaperture 15 trapping the suspending means 20 between the edge of theaperture 18 and thering element 19 thus securing thesuburethral support 10 along a particular desired length of the suspending means 20 such that thesuburethral support 10 hangs loosely under the urethra. -
FIG. 5 shows an alternative method of attaching the suspending means 20 to thesuburethral support 10, the suspending means 20 being threaded through jammingslots 21 such that the suspendingmeans 20 are permanently attached to the jammingslots 21 by being pulled into the jammingslots 21 as shown inFIG. 5 such that the suspending means is held tightly in position. - Alternatively as shown in
FIG. 6 the suspendingmeans 20 may be passed through slots and the suspending means permanently attached to the slots by tying. - In use, as shown in
FIG. 12 thesoft tissue anchor 30 is placed on the introducingtool 50 as described above. Anincision 117 is made in theupper wall 116 of the vagina, as shown inFIG. 11 , and the introducing tool 112 is passed through theincision 117, past one side of theurethra 118, behind thepubic bone 119 and into therectus sheath 120. It is apparent to the surgeon when therectus sheath 120 has been penetrated as this stage of insertion presents significant resistance. Once thehead 58 of the introducingtool 50 and thesoft tissue anchor 30 have passed through therectus sheath 120, the resistance diminishes and the surgeon ceases to insert the introducingtool 50. - The introducing
tool 50 is retracted from the body releasing thesoft tissue anchor 30. Due to thewing sections 34 on thecentral portion 32 of thesoft tissue anchor 30, thesoft tissue anchor 30 is retained by therectus sheath 120 as the introducingtool 50 is retracted. Thus, the suspending means remains in the body, secured by the soft tissue anchor which is opposed by therectus sheath 120, as shown inFIG. 13 . - This procedure is repeated, with a second
soft tissue anchor 30 and suspendingmeans 20, with the introducingtool 50 being passed through theincision 117 and past the other side of theurethra 118. Thus, two suspendingmeans 20 are provided, attached to therectus sheath 120, one passing either side of theurethra 118. - The suspending means 20 are passed through the tunneled
elements 25 of thesuburethral support 10, and the suspendingmeans 20 are pulled through theaperture 15 until thesuburethral support 10 is positioned such that it passes under theurethra 118. The suspending means 20 are then fixed in place by placing aring element 19 over theedge 18 of theaperture 15 such that the suspending means are trapped between theedge 18 and thering element 19 securing them in place. - Alternatively as shown in
FIG. 5 the suspending means may be fixed in the attachment tabs by threading them through jammingslots 21 or tying, as described above. The optimal lengths of the suspendingmeans 20 are such that thesuburethral support 10 passes under theurethra 118, but exerts no pressure on theurethra 118 unless thebladder 121 is displaced. The optimal positioning of thesuburethral support 20 is roughly as illustrated inFIG. 14 . When the bladder is displaced, thesuburethral support 10 aids closure of theurethra 118, thus alleviating urinary incontinence. - In this example, a portion of the surgical implant is impregnated with methylene blue, which is a harmless water soluble dye. At the end of the procedure a small amount of fluid is expelled from the
bladder 121. Should this fluid contain any dissolved methylene blue, it is very likely that the bladder has been perforated on placing thesoft tissue anchor 30. In this case, cystoscopy should be carried out. If no methylene blue is present, the need for cystoscopy is advantageously obviated. Other suitable water-soluble dyes may, of course, be used. - Referring to
FIG. 14 , it can be appreciated that the surgical implant of the present invention, when inserted in the human body, may extend from therectus sheath 120, through the paraurethral space 130 on one side of theurethra 118, around the urethra and back to therectus sheath 120 on the other side. In contrast, the prior art device comprises atape 200 that also extends through theabdominal wall 127 and represents a far greater implanted mass. - Referring to
FIG. 11 , in use, the further embodiment of soft tissue anchor illustrated inFIG. 9 for placement in fibro-fatty soft tissue of the retropubic space is placed on an introducing tool. Anincision 117 is made in theupper wall 116 of the vagina, as shown inFIG. 11 , and the introducing tool 112 is passed through theincision 117, past one side of theurethra 118, and located in the fibro-fatty soft tissue and blood vessels of the para-urethral tunnel. In this case the surgeon does not introduce the soft tissue anchor as far into the body as described previously and therectus sheath 120 is not penetrated. Once the soft tissue anchor has been suitably positioned in the soft tissue the surgeon ceases to insert the introducing tool and retracts the introducing tool from the body releasing the projections of thesoft tissue anchor 72. The release of theprojections 72 of soft tissue anchor by the introducing tool allows the projections to grip the soft tissue surrounding the soft tissue anchor and provide resistance to movement of the soft tissue anchor in a direction opposite to that which it was inserted. - This procedure is repeated, with a second soft tissue anchor such that the
projections 72 of the soft tissue anchor also provide resistance to movement of the soft tissue anchor in a direction opposite to that which it was inserted the introducing tool being passed through theincision 117 and past the other side of theurethra 118. - Thus, two suspending
means 20 are provided, which are held in the soft tissue comprising fibro-fatty tissue and blood vessels. - As described above the suspending
means 20 are passed through the attachment tabs of thesuburethral support 10, and thesuburethral support 10 positioned such that it passes under theurethra 118. - As described above, in one embodiment of the present invention, a soft tissue anchor(s) is inserted in and fixed in the soft tissue of the perineum.
- The perineum corresponds to the outlet of the pelvis inferior to the pelvic diaphragm (levator ani and coccygeus). The boundaries of the perineum are provided by the pubic arch and the arcuate ligament of the pubis; the tip of the coccyx; and on either side the inferior rami of the pubis (140) and ischium, and the sacrotuberous ligament. A line joining the anterior parts of the ischial tuberosities divides the perineum into two portions, the posterior anal triangle portion and the smaller anterior urogenital triangle.
FIG. 21 is an illustration of the anatomy of the pelvis indicating the pubic symphysis (142), the inferior pubic ramus (142), the obturator foramen (134) and the region (138) of the obturator foramen though which devices of the prior art extend. - In this embodiment of the method of the present, the surgical implant does not penetrate or extend through the obturator foramen (134).
- A surgical implant for use in the embodiment of the method wherein the soft tissue anchors are inserted in and anchor in the soft tissue of the perineum may be the same as the implant described in relation to the method of supporting the urethra by anchoring in the tissues of the retropubic space.
- As illustrated in
FIG. 17 , in one embodiment of a surgical implant suitable for anchoring in the tissue of the perineum, the soft tissue anchors (30) are provided with glue (210) for fixation of the implant to the surrounding tissues. Prior to insertion, the implant may be curled or folded around a midline (212) of a soft tissue anchor (30) of the implant, and then a tool may be inserted through an aperture (214) at a first end of the implant (216) such that the implant can be inserted into the body via a vaginal incision (117) on an upper wall of a vagina (116). Once the first end (216) of the implant is suitably located in the soft tissue of the perineum on a first side of the urethra (118), the soft tissue anchor (30) may be uncurled such that the glue comes into contact with the surrounding tissue to adhere the tissue to the implant. The second anchor portion is then inserted through the vaginal incision and suitably located in soft tissue of the perineum on a second side of the urethra (118). The second soft tissue anchor may then be uncurled such that the glue comes into contact with the surrounding tissue to adhere the tissue to the implant. - Alternative embodiments of implants suitable for insertion into the soft tissue of the perineum are illustrated in
FIGS. 18 a, 18 b, 19, 20, 28 and 29. As illustrated, the soft tissue anchor portions (30) can comprise projections, glue or a combination of glue and projections to allow anchorage of the soft tissue anchors in the soft tissue of the perineum. - As illustrated in
FIGS. 19, 28 and 29, a marker (220) may be provided on the implant to aid location of the implant within the body following insertion. The marker may be, for example, a protrusion of the suburethral support, or a marked line on the implant. Other suitable means provided on the suburethral support to indicate the midpoint of the implant may be provided as would be appreciated to those skilled in the art. - As illustrated in
FIG. 19 , resilient zones (222) can be formed from several strip portions conjoined at a first end to the suburethral support and at a second opposite end to soft tissue anchor of the implant. - When not under tension these strip portions are bow shaped and are arranged such that they form a series of alternate and side by side convex and concave strips arranged in substantially the same plane as the implant.
- On application of an extending force of up to 3 N to the implant along its length, the implant can show 2-3 mm of extension, as the bowshaped portions of the tape are pulled into straight strips, the ends of the bowshaped strips being brought together, enabling extension of the tape. The movement of the strips from the resting bowshape into the tensioned straight strips of implant allows the implant to resiliently extend along its length.
- The maximum length to which the implant can be extended, is when the convex and concave strips are pulled such that these strips are brought into alignment with the longitudinal axis of the implant. Depending on the nature and length of the bow shaped portion, the extended length and the force required to promote extension of the implant can be controlled.
- On release of the extending force these now straightened strips of implant of the resilient zone return to their previous non-extended bowshape causing the implant to resiliently return to its non-extended length.
- The ability of the implant to show limited extension following the application of an extending force means that the implant more accurately mimics the movement of dynamic bodily tissue.
- In order that the bowshape like portions of the implant can be pulled such that they are straightened, the material of the implant must be resilient to an extent, The amount of resilience of the material will influence the resilience of the implant to an extending force.
-
FIGS. 22, 23 , 26 and 27 illustrate an embodiment of the method wherein the soft tissue anchors are inserted in and fix in the tissue of the perineum. It should be noted thatFIGS. 22 and 23 are cross-sections ofFIG. 26 , taken along the line A-A. In accordance with one embodiment of the method, the patient is suitably placed in a modified lithotomy position with hips flexed and the legs (136) elevated. A small incision (117) is made in the upper wall of the vagina (116) followed by pariurethral dissection. A first soft tissue anchor (30) is inserted through the vaginal incision (117) and advanced laterally on a first side of the urethra (118), as illustrated inFIG. 27 , into the tissues of the perineum towards and behind the inferior pubic ramus (140), but not through, the obturator foramen (134). The length of surgical implant which is to be inserted into the body for anchorage in the soft tissue of the perineum may be indicated by providing a marker on the implant. In an embodiment of a surgical implant for use in this method around 7 cm of the surgical implant is inserted on each side of the urethra. - The surgical implant and method for anchorage in the soft tissue of the perineum contrasts the devices and methods of the prior art in which the devices are required to be of sufficient length to extend through the obturator foramen (134) in a “safe” zone (138) close to the inferior pubic ramus (140) as illustrated in
FIG. 21 and through the skin. - Provision of an implant capable of anchoring in the soft tissue of the perineum without requiring to pass through the obturator foramen is advantageous as it minimizes the likelihood of anatomical damage to nerves and blood vessels which may occur during procedures which penetrate the obturator foramen.
- Following insertion of a first soft tissue anchor, a second soft tissue anchor is inserted into said vaginal incision on the second side of the urethra and then advanced in an opposing lateral direction to the first soft tissue anchor, as illustrated in
FIG. 27 , into the tissues of the perineum towards, but not through, the obturator foramen (134). - Suitably a centering marker (220) provided on the suburethral support is aligned under the urethra such that the first and second anchors are suitably provided into the soft tissue of the perineum.
- In the embodiment of the method of locating the anchors in the soft tissue of the perineum illustrated, the soft tissue anchors are not anchored above the endopelvic fascia (139).
- Again this device contrasts that described by the prior art device in that it does not extend through the abdominal wall or the obturator foramen and thus does not represent as much implanted mass.
- Various embodiments of the present invention can be envisaged within the scope of the invention, for example the soft tissue anchor may comprise a cone or a half cone such that a circular or semi-circular base is provided as a retaining means to prevent retraction of the soft tissue anchor in a direction opposite to that in which it is inserted into the tissue.
- Alternatively the soft tissue anchor may comprises a substantially flat or disc shaped head. In this case the introducing tool may have a conical head with a sharp point at its apex and a slot for receiving the flat or disc shaped head.
- In yet another example, the soft tissue anchor may be formed of two sections. The upper section, i.e. the portion of the anchor that forms the
sharp point 10, may be made from an absorbable material, such as polyglactin such that a sharp point is provided for insertion of the anchor into the body, but this sharp point is later absorbed by the body so as to eliminate any discomfort or disadvantage caused by a sharp pointed object being retained inside the body. - The soft tissue anchor may be made from metal, such as titanium, as this is a hard material that can easily be formed into the head having the sharp point at its apex, and is sufficiently malleable to provide a tube that may be crimped to the suspending means.
Claims (14)
Priority Applications (10)
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US11/324,028 US20060205995A1 (en) | 2000-10-12 | 2005-12-30 | Apparatus and method for treating female urinary incontinence |
US13/158,426 US8852075B2 (en) | 2000-10-12 | 2011-06-12 | Pelvic implant systems and methods with expandable anchors |
US13/160,338 US8128554B2 (en) | 2000-10-12 | 2011-06-14 | System for introducing a pelvic implant |
US13/163,509 US8182413B2 (en) | 2000-10-12 | 2011-06-17 | Method for fibrous anchoring of a pelvic support |
US13/163,501 US8182412B2 (en) | 2000-10-12 | 2011-06-17 | Pelvic implant with fibrous anchor |
US13/360,311 US8469877B2 (en) | 2000-10-12 | 2012-01-27 | System for introducing a pelvic implant |
US13/966,855 US9089396B2 (en) | 2000-10-12 | 2013-08-14 | Urinary incontinence treatment and devices |
US13/966,832 US20140039248A1 (en) | 2000-10-12 | 2013-08-14 | Urinary incontinence treatment and devices |
US13/966,840 US20140051917A1 (en) | 2000-10-12 | 2013-08-14 | Urinary incontinence treatment and devices |
US14/741,466 US10076394B2 (en) | 2000-10-12 | 2015-06-17 | Method of treating urinary incontinence |
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US11/199,061 US7789821B2 (en) | 2000-10-12 | 2005-08-08 | Apparatus and method for treating female urinary incontinence |
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US10/510,488 Continuation-In-Part US20060058578A1 (en) | 2000-10-12 | 2003-04-11 | Apparatus and method for treating female urinary incontinence |
US10/510,488 Continuation US20060058578A1 (en) | 2000-10-12 | 2003-04-11 | Apparatus and method for treating female urinary incontinence |
US11/199,061 Continuation-In-Part US7789821B2 (en) | 2000-10-12 | 2005-08-08 | Apparatus and method for treating female urinary incontinence |
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US13/160,338 Continuation US8128554B2 (en) | 2000-10-12 | 2011-06-14 | System for introducing a pelvic implant |
US13/163,509 Continuation US8182413B2 (en) | 2000-10-12 | 2011-06-17 | Method for fibrous anchoring of a pelvic support |
US13/163,501 Continuation US8182412B2 (en) | 2000-10-12 | 2011-06-17 | Pelvic implant with fibrous anchor |
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US13/160,338 Expired - Fee Related US8128554B2 (en) | 2000-10-12 | 2011-06-14 | System for introducing a pelvic implant |
US13/163,501 Expired - Lifetime US8182412B2 (en) | 2000-10-12 | 2011-06-17 | Pelvic implant with fibrous anchor |
US13/163,509 Expired - Lifetime US8182413B2 (en) | 2000-10-12 | 2011-06-17 | Method for fibrous anchoring of a pelvic support |
US13/360,311 Expired - Lifetime US8469877B2 (en) | 2000-10-12 | 2012-01-27 | System for introducing a pelvic implant |
US13/966,840 Abandoned US20140051917A1 (en) | 2000-10-12 | 2013-08-14 | Urinary incontinence treatment and devices |
US13/966,832 Abandoned US20140039248A1 (en) | 2000-10-12 | 2013-08-14 | Urinary incontinence treatment and devices |
US13/966,855 Expired - Fee Related US9089396B2 (en) | 2000-10-12 | 2013-08-14 | Urinary incontinence treatment and devices |
US14/741,466 Expired - Lifetime US10076394B2 (en) | 2000-10-12 | 2015-06-17 | Method of treating urinary incontinence |
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US13/163,509 Expired - Lifetime US8182413B2 (en) | 2000-10-12 | 2011-06-17 | Method for fibrous anchoring of a pelvic support |
US13/360,311 Expired - Lifetime US8469877B2 (en) | 2000-10-12 | 2012-01-27 | System for introducing a pelvic implant |
US13/966,840 Abandoned US20140051917A1 (en) | 2000-10-12 | 2013-08-14 | Urinary incontinence treatment and devices |
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US14/741,466 Expired - Lifetime US10076394B2 (en) | 2000-10-12 | 2015-06-17 | Method of treating urinary incontinence |
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US8182412B2 (en) | 2012-05-22 |
US20140039244A1 (en) | 2014-02-06 |
US20140039248A1 (en) | 2014-02-06 |
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US20140051917A1 (en) | 2014-02-20 |
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US8469877B2 (en) | 2013-06-25 |
US20110237867A1 (en) | 2011-09-29 |
US20110237868A1 (en) | 2011-09-29 |
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