WO1996039998B1 - Pull back sleeve system with compression resistant inner shaft - Google Patents
Pull back sleeve system with compression resistant inner shaftInfo
- 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
Links
- 230000006835 compression Effects 0.000 title abstract 2
- 238000007906 compression Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 claims abstract 5
- 239000004812 Fluorinated ethylene propylene Substances 0.000 claims abstract 4
- 229920002313 fluoropolymer Polymers 0.000 claims abstract 4
- 229920009441 perflouroethylene propylene Polymers 0.000 claims abstract 4
- 229920005989 resin Polymers 0.000 claims abstract 4
- 239000011347 resin Substances 0.000 claims abstract 4
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims abstract 4
- 238000001816 cooling Methods 0.000 claims abstract 3
- 238000010438 heat treatment Methods 0.000 claims abstract 3
- 238000004804 winding Methods 0.000 claims abstract 3
- 238000004519 manufacturing process Methods 0.000 claims abstract 2
- 230000000887 hydrating effect Effects 0.000 claims 4
- 238000000034 method Methods 0.000 claims 3
- 229920000554 ionomer Polymers 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 abstract 1
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
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.
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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