WO1998047446A1 - Device and method for effecting an anchorage when implanting bifurcated stents - Google Patents
Device and method for effecting an anchorage when implanting bifurcated stents Download PDFInfo
- Publication number
- WO1998047446A1 WO1998047446A1 PCT/IB1998/000617 IB9800617W WO9847446A1 WO 1998047446 A1 WO1998047446 A1 WO 1998047446A1 IB 9800617 W IB9800617 W IB 9800617W WO 9847446 A1 WO9847446 A1 WO 9847446A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheath
- core
- passage
- guide wire
- catheter
- Prior art date
Links
Classifications
-
- 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
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/856—Single tubular stent with a side portal passage
-
- 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
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/954—Instruments specially adapted for placement or removal of stents or stent-grafts for placing stents or stent-grafts in a bifurcation
-
- 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
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/958—Inflatable balloons for placing stents or stent-grafts
-
- 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
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2002/826—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents more than one stent being applied sequentially
-
- 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
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2002/828—Means for connecting a plurality of stents allowing flexibility of the whole structure
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/006—Additional features; Implant or prostheses properties not otherwise provided for modular
Definitions
- the present invention relates to a device by means of which to effect an anchorage when implanting a bifurcated stent in a passage of the human or the animal body, and to a method in which use is made of such a device.
- Endovascular prostheses are devices that can be implanted stably in a passage of the human or the animal body, typically a blood vessel or a natural duct that has become restricted as the result of a pathological or traumatic episode, to the end of inducing and maintaining patency and thus restoring normal function.
- the present invention relates more particularly to a device such as will facilitate the implantation of a so-called bifurcated type of stent, that is to say a stent designed to occupy a vessel exhibiting a main passage and a collateral passage.
- the prior art embraces a bifurcated endovascular stent and a relative method for its implantation, as disclosed in Italian patent application BO96A 000294 in the name of the same applicant.
- Stents of the type in question are implanted with the aid of special guide wires each comprising a linear core accommodated coaxially within a tubular sheath, which is slidable in relation to the core.
- the insertion of the guide wires into the branched vessel allows a catheter to be directed into and along the main and collateral passages, which in turn enables the component parts of the bifurcated stent to be implanted in succession by guiding the catheter through a set sequence of steps.
- the object of the present invention is to overcome the drawbacks in question by providing a device capable of anchoring itself firmly to the wall of the vessel, in the main passage or in the collateral passage as appropriate, and at the same time of aligning itself automatically relative to the wall in an operating configuration that has the effect of immobilizing the guide wire for as long as necessary during implantation.
- the stated object is realized in a device according to the invention, as recited in the preamble of claim 1 , wherein the linear core and the tubular sheath of the guide wire are secured one to another at one end and the sheath affords a lateral area weakened in such way as to respond to the action that accompanies a relative axial movement of the core and the sheath by deforming elastically to the point ultimately of interfering with the wall of the vessel and becoming anchored thereto.
- a device embodied in accordance with the invention affords a number of advantages.
- a first advantage, deriving from the facility of anchoring the guide wire to the vessel wall, is that the surgeon can keep the wire taut in relation to the vessel during the subsequent positioning movements, and moreover, the catheter can be rotated as it is advanced along the wire without the risk of drawing the wire into rotation and losing the predetermined and correct position of the implant.
- This advantageous feature is the more significant particularly in the case of guide wires inserted into the collateral passage, which being necessarily of modest diameter are more susceptible than others to torsional interference and loss of initial position, whether occasioned by the catheter or by myoelectrical activity of the human or animal body during implantation.
- a correctly and stably positioned guide wire also reduces the risk of the implant operation being prolonged by unforeseen events connected with the possible need to restore correct position if lost for whatever reason during one or other step of the procedure, thus ensuring that normal operating time schedules can be maintained even in the presence of somewhat complex clinical situations.
- Such a method comprises a succession of steps as recited in the preamble of claim 12, and incorporates the step of inducing a relative axial sliding movement in the core and the sheath of at least one guide wire such as will cause the weakened lateral area of the sheath to expand in a direction transverse to the core and to interfere ultimately with the wall of the corresponding passage, with the result that the guide wire as a whole remains anchored thereto. More exactly, the step of inducing relative axial movement precedes the step of advancing the catheter along the guide wire and into the relative passage.
- - figs 1 and 2 are two overall views of a device according to the present invention, illustrated in two typical operating configurations and enlarged appreciably; - fig 1a shows a detail of the device as illustrated in fig 1 , further enlarged;
- - fig 3 shows a guide wire according to the present invention inserted into a passage of the human or animal body
- - figs 4a, 4b, 4b', 4c, 4d, 4e, 4f, 4g are schematic diagrams indicating a sequence of steps in a method of implanting an endovascular stent, wherein use is made of the device illustrated in figs 1 to 3;
- - fig 5 is the overall perspective of a conventional catheter utilized for implanting an endovascular stent in a passage of the human or animal body. Description of the Illustrative Embodiment
- 1 denotes a device, in its entirety, for use by surgeons when implanting an endovascular stent 201 in a vessel of the human or animal body comprising a main passage 203, and a collateral passage 203c branched from the main passage.
- the device 1 comprises a guide wire G1 (and G2) composed of a linear core 2, consisting in a thin elastically compliant wire, and a tubular sheath 3 associated coaxially with the core 2.
- the core 2 and the sheath 3 are secured together at one end 4 of the device.
- the sheath 3 takes the form preferably of a long, continuous and elastic spiral wound wire encircling the central core 2, and is also divided into two or more portions 6, 7 and 8 interconnected by tubular sleeves 5.
- Each of the sleeves 5 illustrated can be considered as a cylindrical solid disposed with its peripheral surface coaxial to the core 2 and connected to two contiguous portions 6, 7 and 7, 8 of the sheath 3.
- the single sleeve 5 is embodied in such a way as to fashion the sheath 3 with a lateral area affording less resistance than the portions 6, 7 and 8 on either side when subjected to compressive forces acting on the sheath 3 in a direction parallel to the core 2.
- a preferred embodiment of the sleeve 5, shown to advantage in fig 1a, comprises two rigid rings 12 and three elongated struts 10 (which could also be reduced to just two and remain equally functional), extending parallel with the core 2, of which the ends 11 are fixed to the rings 12 and equispaced around the core 2.
- the struts 10 combine notionally to envelop a lateral surface of the sleeve 5 that remains within the transverse dimensional compass of the sheath 3 and exhibits no discernible break in continuity with the portions of the sheath on either side.
- the lateral surface of the sleeve 5 behaves quite dissimilarly to the remaining portions 6, 7 and 8 of the sheath 3 when under compressive stresses applied to the sheath 3 in a direction parallel to the core 2. More exactly, the lateral surface of the sleeve 5 remains in alignment with the lateral surfaces afforded by the contiguous portions 6, 7 and 8 of the sheath 3 when not subject to such stresses, and thus within the dimensional compass of the sheath overall, whereas when compressed axially, the same lateral surface of the sleeve 5 deforms elastically and expands transversely to the core 2, as indicated in fig 2, swelling beyond the transverse dimensional compass of the sheath 3.
- the sleeve 5 might exhibit numerous different types of structure, all equivalent nonetheless from the functional standpoint.
- the elongated struts 10 could be fashioned as flat metal strips or thin flexible rods, or even as an elastically deformable membrane.
- the device 1 can be furnished with manipulation means denoted 13 in their entirety, consisting in rigid rods 14 and 15 associated respectively with the sheath 3 and with the core 2, of which the ends 14a and 15e are fashioned as rings for ease of handling.
- Such means 13 will be embodied separately from the device 1 in order to allow fitment of the relative component stent, as explained in due course, and attached to the device at a later stage utilizing conventional means not shown in the drawings.
- the means 13 in question are shown (figs 1 and 2) in an operating configuration assumed during implantation.
- the rods 14 and 15 of the device 1 are displaced manually one in relation to another, between an at-rest condition and an operating condition, against the action of elastic means 3m consisting typically in an extension spring that might be embodied separately, as illustrated in figs 1 and 2, or alternatively embodied integrally with the sheath 3.
- the spring tension existing between the core 2 and the sheath 3 will cause the device 1 to assume a position, when at rest (see fig 1), such that the lateral area of the sheath 3 coinciding with the sleeve or sleeves 5 remains within the transverse dimensional compass of the sheath 3 overall.
- the lateral surface of the sleeve 5 is caused to deform and expand beyond the dimensional compass of the sheath 3.
- the device 1 thus described allows advantageously of anchoring a guide wire G1 or G2 to the wall of a main passage 203, and/or to the wall of a relative collateral passage 203c in the case of an implant involving the use of a bifurcated stent 201.
- the general method of implanting a stent 201 of bifurcated embodiment consisting effectively in two component stents 1P and 1S, is illustrated schematically in figs 4a, 4b, 4b', 4c, 4d, 4e, 4f and 4g.
- Such a method involves the use of a catheter 300 as illustrated in fig 5, which is comprehensively described and illustrated in the prior art reference mentioned above.
- the method of implanting a bifurcated stent will be seen to comprise the steps of:
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98912677A EP1011531A1 (en) | 1997-04-24 | 1998-04-23 | Device and method for effecting an anchorage when implanting bifurcated stents |
AU67438/98A AU6743898A (en) | 1997-04-24 | 1998-04-23 | Device and method for effecting an anchorage when implanting bifurcated stents |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO97A000245 | 1997-04-24 | ||
IT97BO000245A IT1297168B1 (en) | 1997-04-24 | 1997-04-24 | DEVICE AND METHOD OF PREPARATION FOR THE IMPLANTATION OF BIFURCATED STENTS |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998047446A1 true WO1998047446A1 (en) | 1998-10-29 |
Family
ID=11342221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB1998/000617 WO1998047446A1 (en) | 1997-04-24 | 1998-04-23 | Device and method for effecting an anchorage when implanting bifurcated stents |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1011531A1 (en) |
AU (1) | AU6743898A (en) |
IT (1) | IT1297168B1 (en) |
WO (1) | WO1998047446A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0904745A3 (en) * | 1997-09-24 | 2000-01-12 | Medtronic Ave, Inc. | Endolumenal prosthesis and method of use in bifurcation regions of body lumens |
WO2001039697A1 (en) * | 1999-12-01 | 2001-06-07 | Advanced Cardiovascular Systems, Inc. | Stent and catheter assembly and method for treating bifurcations |
WO2004112654A1 (en) * | 2003-06-17 | 2004-12-29 | Medtronic Vascular Inc. | Method and system for treating an ostium of a side-branch vessle |
EP1905398A3 (en) * | 1998-01-14 | 2009-08-05 | Advanced Stent Technologies, Inc. | Extendible stent apparatus |
US7678142B2 (en) | 1996-11-04 | 2010-03-16 | Boston Scientific Scimed, Inc. | Extendible stent apparatus |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3996938A (en) * | 1975-07-10 | 1976-12-14 | Clark Iii William T | Expanding mesh catheter |
WO1991002494A1 (en) * | 1989-08-18 | 1991-03-07 | Evi Corporation | Catheter atherotome |
US5041093A (en) * | 1990-01-31 | 1991-08-20 | Boston Scientific Corp. | Catheter with foraminous anchor |
EP0486157A2 (en) * | 1990-10-25 | 1992-05-20 | C.R. Bard, Inc. | Improvements in guidewires and catheters usable therewith |
WO1997045073A1 (en) * | 1996-05-31 | 1997-12-04 | Bard Galway Limited | Bifurcated endovascular stents and method and apparatus for their placement |
-
1997
- 1997-04-24 IT IT97BO000245A patent/IT1297168B1/en active IP Right Grant
-
1998
- 1998-04-23 AU AU67438/98A patent/AU6743898A/en not_active Abandoned
- 1998-04-23 WO PCT/IB1998/000617 patent/WO1998047446A1/en not_active Application Discontinuation
- 1998-04-23 EP EP98912677A patent/EP1011531A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3996938A (en) * | 1975-07-10 | 1976-12-14 | Clark Iii William T | Expanding mesh catheter |
WO1991002494A1 (en) * | 1989-08-18 | 1991-03-07 | Evi Corporation | Catheter atherotome |
US5041093A (en) * | 1990-01-31 | 1991-08-20 | Boston Scientific Corp. | Catheter with foraminous anchor |
EP0486157A2 (en) * | 1990-10-25 | 1992-05-20 | C.R. Bard, Inc. | Improvements in guidewires and catheters usable therewith |
WO1997045073A1 (en) * | 1996-05-31 | 1997-12-04 | Bard Galway Limited | Bifurcated endovascular stents and method and apparatus for their placement |
Non-Patent Citations (1)
Title |
---|
ITBO960294 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7678142B2 (en) | 1996-11-04 | 2010-03-16 | Boston Scientific Scimed, Inc. | Extendible stent apparatus |
EP0904745A3 (en) * | 1997-09-24 | 2000-01-12 | Medtronic Ave, Inc. | Endolumenal prosthesis and method of use in bifurcation regions of body lumens |
EP1905398A3 (en) * | 1998-01-14 | 2009-08-05 | Advanced Stent Technologies, Inc. | Extendible stent apparatus |
WO2001039697A1 (en) * | 1999-12-01 | 2001-06-07 | Advanced Cardiovascular Systems, Inc. | Stent and catheter assembly and method for treating bifurcations |
JP2003515385A (en) * | 1999-12-01 | 2003-05-07 | アドバンスド、カーディオバスキュラー、システムズ、インコーポレーテッド | Method of treating aggregates and bifurcations of stents and catheters |
WO2004112654A1 (en) * | 2003-06-17 | 2004-12-29 | Medtronic Vascular Inc. | Method and system for treating an ostium of a side-branch vessle |
US7105015B2 (en) | 2003-06-17 | 2006-09-12 | Medtronic Vascular, Inc. | Method and system for treating an ostium of a side-branch vessel |
Also Published As
Publication number | Publication date |
---|---|
ITBO970245A0 (en) | 1997-04-24 |
ITBO970245A1 (en) | 1998-10-24 |
IT1297168B1 (en) | 1999-08-03 |
EP1011531A1 (en) | 2000-06-28 |
AU6743898A (en) | 1998-11-13 |
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