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WO1996039998B1 - Pull back sleeve system with compression resistant inner shaft - Google Patents

Pull back sleeve system with compression resistant inner shaft

Info

Publication number
WO1996039998B1
WO1996039998B1 PCT/US1996/005842 US9605842W WO9639998B1 WO 1996039998 B1 WO1996039998 B1 WO 1996039998B1 US 9605842 W US9605842 W US 9605842W WO 9639998 B1 WO9639998 B1 WO 9639998B1
Authority
WO
WIPO (PCT)
Prior art keywords
sheath
distal
delivery system
stent
stent delivery
Prior art date
Application number
PCT/US1996/005842
Other languages
French (fr)
Other versions
WO1996039998A2 (en
WO1996039998A3 (en
Filing date
Publication date
Priority claimed from US08/484,006 external-priority patent/US5788707A/en
Application filed filed Critical
Priority to CA002223054A priority Critical patent/CA2223054C/en
Priority to EP96913197A priority patent/EP0836447B1/en
Priority to AT96913197T priority patent/ATE228804T1/en
Priority to DE69625205T priority patent/DE69625205T2/en
Priority to JP9500489A priority patent/JPH11506032A/en
Publication of WO1996039998A2 publication Critical patent/WO1996039998A2/en
Publication of WO1996039998A3 publication Critical patent/WO1996039998A3/en
Publication of WO1996039998B1 publication Critical patent/WO1996039998B1/en

Links

Abstract

A stent delivery system for delivering a stent comprising, a stent disposed on the distal end of the catheter, and an inner core, wherein the inner core is resistant to appreciable compression or accordion. The catheter further comprises a first sheath covering a portion of the inner core, wherein at least a portion of the distal end of the inner core is left uncovered by the first sheath, a retractable sheath which covers at least a portion of the stent and a portion of the distal end of the inner core and a retracting means for retracting the distal sheath to release the stent. The present invention also discloses a method of making the retractable sheath for a stent delivery system, comprising the steps of placing a sheath made of material comprising tetrafluoroethylene fluorocarbon polymers or fluorinated ethylene-propylene resins on a mandrel, winding a wire coil around the Teflon® sheath, heating the tubing, cooling the tubing and removing the mandrel and coil.

Claims

AMENDED CLAIMS[received by the International Bureau on 11 February 1997 (11.02.97); original claims 1-20 replaced by amended claims 1-19 (4 pages)]
1. A stent delivery system comprising: a substantially incompressible inner core having proximal and distal ends, wherein the inner core comprises a spring coil; a stent concentrically arranged around the inner core near the distal end; a retractable sheath surrounding at least a portion of the stent, and retracting means connected to the distal sheath for retracting the distal sheath; whereby when the retracting means is retracted the distal sheath is retracted freeing the stent for delivery.
2. The stent delivery system as in claim 1, further comprising an outer sheath having proximal and distal ends and covering a portion of the inner core, wherein at least a portion of the distal end of the inner core is left exposed by the outer sheath, the retractable sheath overlapping a portion of the distal end of the outer sheath.
3. The stent delivery system as in claim 2, wherein the retracting means comprises a pull back wire attached to the retractable sheath, the pull back wire being longitudinally moveable.
4. The stent delivery system as in claim 3, further comprising an annular ring, wherein the pull back wire is attached to the annular ring and wherein the retractable sheath is adhered to the annular ring allowing the pull back wire to retract the retractable sheath.
5. The stent delivery system as in claim 4, further comprising a stopper positioned to prevent the stent from moving proximally as the retractable sheath is retracted to expose the stent.
6. The stent delivery system as in claim 5, further comprising a pull back wire lumen which partially encloses the pull back wire and is at least partially covered by the outer sheath.
7. The stent delivery system as in claim 6, further comprising a stiffening wire having proximal and distal ends positioned longitudinally along the inner core.
8. The stent delivery system as in claim 7, wherein the distal end of the stiffening wire and the distal end of the pull back wire lumen are truncated prior to the annular ring.
9. The stent delivery system as in claim 4, wherein the retractable sheath comprises a proximal sheath having proximal and distal ends, the proximal end of the proximal sheath overlapping the distal end of the outer sheath, and a distal sheath having proximal and distal ends, the distal end of the proximal sheath being connected to the proximal end of the distal sheath and wherein the annular ring is attached to the proximal end of the distal sheath.
10. The stent delivery system as in claim 9, further comprising a manifold, the manifold comprising a sliding member which is connected to the pull back wire and acts to retract said pull back wire.
11. The stent delivery system as in claim 10, wherein the outer sheath comprises poly olefinic ionomer material.
12. The stent delivery system as in claim 11, wherein the retractable sheath is made of material which comprises tetrafluoroethylene fluorocarbon polymers or fluorinated ethylene-propylene resins.
13. The stent delivery system as in claim 12, wherein the distal sheath comprises a contoured pattern of grooves.
14. The stent delivery system as in claim 13, further comprising a hydrating luer located on the manifold, a distal tip located at the distal end of the catheter and a communication means between the hydrating luer and the distal tip which allows for hydrating the distal tip from the hydrating luer.
15. A retractable sheath for a stent delivery system comprising a tube of material made from tetrafluoroethylene fluorocarbon polymers or fluorinated ethylene- propylene resins and which is contoured with a pattern of grooves, the contoured sheath being made from the process comprising the steps of: placing the tube on a mandrel, wherein the diameter of the mandrel is slightly smaller than the inside diameter of the tube; winding a wire coil around the tube; heating the tube; cooling the tube; and removing the mandrel and coil.
16. A method of making a retractable sheath for a stent delivery system, comprising the steps of: placing a sheath made of material comprising tetrafluoroethylene fluorocarbon polymers or fluorinated ethylene-propylene resins on a mandrel, wherein the diameter of the mandrel is slightly smaller than the inside diameter of the sheath; winding a wire coil around the sheath; heating the sheath; cooling the sheath; and removing the mandrel and coil.
17. A method as in claim 16, wherein the wire coil is a cross-section wire coil.
18. A method as in claim 17, wherein the wire coil is a rectangular wire coil.
19. A stent delivery system comprising: a substantially incompressible inner core having proximal and distal ends, and being made from a wire coil with a predetermined pitch such that it is flexible in an uncompressed state, and will become rigid when compressed; a stent concentrically arranged around the inner core near the distal end; a retractable sheath surrounding at least a portion of the stent, and retracting means connected to the distal sheath for retracting the distal sheath; whereby when the retracting means is retracted to free the stent for delivery, the distal sheath is retracted, causing the wire coil to compress and taking up the excess pitch in the wire coil, making the wire coil substantially rigid, preventing the inner core from collapsing.
PCT/US1996/005842 1995-06-07 1996-04-26 Pull back sleeve system with compression resistant inner shaft WO1996039998A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA002223054A CA2223054C (en) 1995-06-07 1996-04-26 Pull back sleeve system with compression resistant inner shaft
EP96913197A EP0836447B1 (en) 1995-06-07 1996-04-26 Pull back sleeve system with compression resistant inner shaft
AT96913197T ATE228804T1 (en) 1995-06-07 1996-04-26 RETRACT CUFF SYSTEM WITH PRESSURE RESISTANT INNER SHAFT
DE69625205T DE69625205T2 (en) 1995-06-07 1996-04-26 WITHDRAWAL CUFF SYSTEM WITH PRESSURE RESISTANT INTERNAL SHAFT
JP9500489A JPH11506032A (en) 1995-06-07 1996-04-26 Pullback sleeve system with compression resistant inner shaft

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/484,006 US5788707A (en) 1995-06-07 1995-06-07 Pull back sleeve system with compression resistant inner shaft
US08/484,006 1995-06-07

Publications (3)

Publication Number Publication Date
WO1996039998A2 WO1996039998A2 (en) 1996-12-19
WO1996039998A3 WO1996039998A3 (en) 1997-01-23
WO1996039998B1 true WO1996039998B1 (en) 1997-03-13

Family

ID=23922349

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/005842 WO1996039998A2 (en) 1995-06-07 1996-04-26 Pull back sleeve system with compression resistant inner shaft

Country Status (7)

Country Link
US (3) US5788707A (en)
EP (1) EP0836447B1 (en)
JP (1) JPH11506032A (en)
AT (1) ATE228804T1 (en)
CA (1) CA2223054C (en)
DE (1) DE69625205T2 (en)
WO (1) WO1996039998A2 (en)

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