WO2000038766A1 - Expandable cannula - Google Patents
Expandable cannula Download PDFInfo
- Publication number
- WO2000038766A1 WO2000038766A1 PCT/US1999/030742 US9930742W WO0038766A1 WO 2000038766 A1 WO2000038766 A1 WO 2000038766A1 US 9930742 W US9930742 W US 9930742W WO 0038766 A1 WO0038766 A1 WO 0038766A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cannula
- wall sections
- passageway
- sectional area
- cross sectional
- Prior art date
Links
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
-
- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30721—Accessories
- A61F2/30724—Spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity
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- A—HUMAN NECESSITIES
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- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/3006—Properties of materials and coating materials
- A61F2002/30062—(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
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- 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
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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- 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
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- 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
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- 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
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30199—Three-dimensional shapes
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- 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
- A61F2/02—Prostheses implantable into the body
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- 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
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30364—Rotation about the common longitudinal axis
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- 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
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- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2002/448—Joints for the spine, e.g. vertebrae, spinal discs comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
-
- 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2002/4635—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor using minimally invasive surgery
-
- 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
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0004—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof bioabsorbable
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0017—Angular shapes
- A61F2230/0019—Angular shapes rectangular
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0017—Angular shapes
- A61F2230/0026—Angular shapes trapezoidal
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00179—Ceramics or ceramic-like structures
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00365—Proteins; Polypeptides; Degradation products thereof
Definitions
- the present invention relates to surgical cannulae.
- the present invention provides an expandable surgical cannula which can be inserted into a patient in an initially folded up state and then subsequently unfolded to assume a larger diameter to provide an enlarged access portal for the insertion of surgical instruments therethrough subsequent to cannula insertion into a patient's body.
- the diameter of the cannula is increased in size by an obturator passing therethrough.
- the present expandable cannula comprises a plurality of generally planar longitudinally extending wall sections which are pi votally joined together along their lengths to enclose a cannulated passageway, with at least some of the wall sections being foldable one over another such that the cannula has a first cross sectional area when the wall sections are folded one over another and such that the cannula has a second cross sectional area when the wall sections are unfolded, wherein the first cross sectional area is smaller than the second cross sectional area.
- the present expandable cannula comprises a plurality of separate overlapping generally planar, (or slightly curved), longitudinally extending wall sections which are disposed within an elastic sheath, wherein the generally planar longitudinally extending wall sections are initially deployed overlapping one another, with at least some of the wall sections disposed on top of adjacent wall sections at one side, and beneath an opposite wall section, at on opposite side when the cannula is unexpanded; and wherein at least some of the wall sections are positioned with their longitudinally extending sides buttressing against one another around the circumference of the cannula after the cannula has been expanded.
- Fig. 1A is a cross-sectional view of a first embodiment of the present cannula folded together in an unexpanded octagonal shape.
- Fig. IB is a cross-sectional view of the present cannula in a partially unfolded shape.
- Fig. 2 A is a perspective view corresponding to Fig. 1 A., showing a portion of the length of the cannula.
- Fig. 2B is a perspective view corresponding to Fig. IB., showing a portion of the length of the cannula.
- Fig. 3 is a cross-sectional view of the first embodiment of the present cannula unfolded to a fully expanded state.
- Fig. 4 is a perspective view corresponding to Fig. 3., showing a portion of the length of the cannula.
- Fig. 5 is a perspective view of a portion of the length of the first embodiment of the present cannula showing comparative dimensions of the cannula in a folded together, unexpanded octagonal shape, and in an unfolded, fully expanded state, with the obturator used for unfolding the cannula.
- Fig. 6A illustrates systems for maintaining a cannula in a "locked open” state, with an enlarged portion of the cannula shown folded up.
- Fig. 6B illustrates systems for maintaining a cannula in a "locked open” state, with an enlarged portion of the cannula shown unfolded.
- Fig. 7A illustrates a top sectional view of a second embodiment of the invention in an unexpanded position with the present cannula comprising a plurality of separate longitudinally extending wall sections disposed overlapping one on top of the other.
- Fig. 7B illustrates a top sectional view of the invention of Fig. 7 A in an expanded position with the plurality of separate longitudinally extending wall sections disposed adjacent one another.
- Fig. 8 A illustrates a top sectional view of a third embodiment of the invention in an unexpanded position.
- Fig. 8B illustrates a top sectional view of the invention of Fig. 8 A in a partially expanded position.
- Fig. 8C illustrates a top sectional view of the invention of Fig. 8 A in a fully expanded position.
- Cannula 15 is preferably formed from a continuous extrusion of polymeric material with the wall thickness of the polymeric extrusion varying around the circumference of the cannula so as to provide longitudinally extending hinges formed between each of a plurality of generally planar longitudinally extending wall sections.
- cannula 15 is formed by a plurality of generally planar longitudinally extending wall sections which are pivotally joined together, (and folded one over another), along their lengths to enclose a cannulated passageway 60.
- cannula 15 has sixteen generally planar wall sections, (being wall sections 20, 21, 22, 23, 30, 31, 32, 33, 40, 41, 42, 43, 50, 51, 52, and 53), which are pivotally joined together as shown. It is to be understood that more or less than the presently illustrated sixteen side walls can be used in the present system, keeping within the scope of the present invention.
- cannula 15 When initially inserted into the patient, cannula 15 is folded together to have a compact polygonal shape, (for example, the octagonal shape as is shown in Figs. 1 A and 2A). Continuing with the present example, when folded together, eight outer wall sections 20, 21, 30, 31, 50, 41, 50 and 51 will define an outer surface of cannula 15.
- cannula 15 is then expanded, (as shown in Figs. 3 and 4) with wall sections 20, 21, 22, 23, 30, 31, 32, 33, 40, 41, 42, 43, 50, 51, 52, and 53 unfolding to define a continuous outer surface which encloses the central longitudinally extending passageway 60 therethrough.
- a plurality of longitudinally extending hinges are formed between each of the adjacent wall sections. (For clarity, only hinges 24, 34, 44 and 54 are numbered).
- Hinges may preferably be formed by reducing the wall thickness of the polymer extrusion along these locations such any bending occurs along the longitudinally extending hinges, with the wall sections spanning between the hinges remaining generally planar. Being thicker than the hinges, the wall sections will thus tend to remain planar, (or to remain slightly curved), such that the cannula can initially be folded together before it is expanded.
- Fig. 5 illustrates the expansion of cannula 15 from a "folded up" to an "unfolded” state, as follows. Cannula 15 is initially folded together in an octagonal shape (as illustrated by portion 15A of cannula 15).
- cannula portion 15A corresponds to the unexpanded position of the cannula as shown in Fig. 2 A and cannula portion 15B corresponds to the expanded position of the cannula as shown in Fig. 4.
- obturator 50 As obturator 50 is inserted through passageway 60, its diameter Dl, (which is larger that the width Wl of cannula 15 is its initial folded up state (15A), will cause cannula 15 to expand to a final fully expanded state (15B), having a width W2.
- obturator 50 is preferably dimensioned as a cylinder having a diameter Dl being greater than minimum diameter width Wl of folded up cannula portion 15A and less than maximum diameter W2 of the fully expanded cannula portion 15B.
- obturator 50 may then be withdrawn from central passageway 60 such that an enlarged passageway is created having a larger cross sectional area from that of folded up cannula portion 15 A.
- hinges 24, 34, 44 and 54 will move in directions D, as shown by the intermediate position of Figs. IB and 2B, such that cannula 15 unfolds.
- Obturator 50 preferably has an optional narrow end 52 which has a diameter D2 sufficiently narrow to access passageway 60 when the cannula is unexpanded in the "folded up" state shown as cannula portion 15 A. (i.e.: diameter D2 is less than width Wl).
- wall sections may be used for any of the cannula embodiments set forth herein.
- the wall sections may be generally planar or slightly curved.
- the obturator used to open the cannula need not be cylindrical in shape. Rather, other shapes of the obturator can be used, provided only that the obturator is sufficiently narrow to be received within the narrow folded state of the cannula and sufficiently wide to cause the cannula to unfold as it is inserted.
- Other systems such as a long balloon (not shown) received within passageway 60 can be inflated to "open" cannula 15 from its initial folded up state to a fully expanded (larger diameter) state.
- obturator 50 may be received within a tubular sleeve (not shown), and the tubular sleeve may preferably be left behind within cannula 15 to hold cannula 15 in a fully open and unfolded orientation after obturator 50 has been removed.
- the tubular sleeve is received over obturator 50, and within cannula 15, and will remain in place to provide a cannulated access after obturator 50 has been removed.
- FIGs. 6A and 6B illustrate systems for maintaining the cannula in a "locked open” state.
- Fig. 6 A an enlarged view of wall sections 31 and 33 is shown, (positioned in the same orientation as shown in Fig. IB).
- hinges 71 and 73 will articulator around pins 72, 74 and 76, such that pin 74 moves radially outwardly toward hinge 34, until hinge 73 abuts stop 75 as shown in Fig. 6B.
- hinge 73 pushing against stop 75 will hold hinge 34 on cannula 15 in a "locked open” position.
- a plurality of such locking system can be provided between some or all of the adjacent wall sections 20, 21, 22, 23, 30, 31, 32, 33, 40, 41, 42, 43, 50, 51, 52, and 53 such that each of the hinged connections between the wall sections (e.g.: hinges 24, 34, 44 and 54), can be kept open, supporting cannula 15 is a fully locked open position.
- FIGS. 7A and 7B show a second embodiment of the present invention in which cannula 80 comprises a plurality of wall sections 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91 and 92, which may be either generally planar, or slightly curved as shown.
- Wall sections 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91 and 92 are preferably positioned to overlap one another, with at least some of the wall sections disposed on top of adjacent wall sections at one side, and beneath an opposite wall section when cannula 80 is unexpanded as shown in Fig. 7A.
- each of wall sections 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91 and 92 may be attached at one end (e.g.: along side 97 for wall section 82 and along side 99 for wall section 92), to the interior of elastic sheath 95
- Figs. 8 A, 8B and 8C shows a third embodiment of the present invention in which cannula 100 comprises a plurality of wall sections 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115 and 116, initially folded together as shown.
- Wall sections 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115 and 116 may be either generally planar, or slightly curved as shown.
- Wall sections 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115 and 116 are preferably positioned to overlap one another, wall sections 101, 102, 103 and 104 forming an interior surface with wall sections 105, 106, 107, and 108 forming an exterior surface.
- wall sections 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115 and 116 become disposed such that they wrap around the circumference of the cannula after the cannula has been expanded.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU22114/00A AU2211400A (en) | 1998-12-23 | 1999-12-22 | Expandable cannula |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US11365198P | 1998-12-23 | 1998-12-23 | |
US60/113,651 | 1998-12-23 |
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WO2000038766A1 true WO2000038766A1 (en) | 2000-07-06 |
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PCT/US1999/030742 WO2000038766A1 (en) | 1998-12-23 | 1999-12-22 | Expandable cannula |
PCT/US1999/030743 WO2000038582A1 (en) | 1998-12-23 | 1999-12-22 | Bony tissue resector |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US1999/030743 WO2000038582A1 (en) | 1998-12-23 | 1999-12-22 | Bony tissue resector |
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US (2) | US6312443B1 (en) |
AU (2) | AU2211400A (en) |
WO (2) | WO2000038766A1 (en) |
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- 1999-12-21 US US09/469,727 patent/US6280447B1/en not_active Expired - Lifetime
- 1999-12-22 AU AU22114/00A patent/AU2211400A/en not_active Abandoned
- 1999-12-22 WO PCT/US1999/030742 patent/WO2000038766A1/en active Application Filing
- 1999-12-22 WO PCT/US1999/030743 patent/WO2000038582A1/en active Application Filing
- 1999-12-22 AU AU22115/00A patent/AU2211500A/en not_active Abandoned
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WO2017127543A1 (en) * | 2016-01-21 | 2017-07-27 | Boston Scientific Scimed, Inc. | Medical devices and related methods of use |
CN108697438A (en) * | 2016-01-21 | 2018-10-23 | 波士顿科学医学有限公司 | Medical treatment device and its associated method of use |
CN106264627A (en) * | 2016-08-10 | 2017-01-04 | 邹德威 | A kind of inflatable seamless service aisle and self-expanding approach positioning dilator |
Also Published As
Publication number | Publication date |
---|---|
AU2211400A (en) | 2000-07-31 |
US6312443B1 (en) | 2001-11-06 |
US6280447B1 (en) | 2001-08-28 |
AU2211500A (en) | 2000-07-31 |
WO2000038582A9 (en) | 2000-11-30 |
WO2000038582A1 (en) | 2000-07-06 |
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