Patent
Stent delivery system with perfusion
| العنوان: | Stent delivery system with perfusion |
|---|---|
| Patent Number: | 6,139,524 |
| تاريخ النشر: | October 31, 2000 |
| Appl. No: | 09/174,283 |
| Application Filed: | October 16, 1998 |
| مستخلص: | An inventive perfusion catheter is disclosed which allows for the flow of a bodily fluid across the catheter while the catheter delivers a treatment device to a specified bodily location. The inventive perfusion catheter finds particular application in the delivery of a stent. The stent is deployed from a chamber having perfusion openings in the proximal and distal ends. The perfusion openings are constructed and arranged so as to allow the flow of a bodily fluid such as blood through the chamber. |
| Inventors: | Killion, Douglas P. (Maple Grove, MN) |
| Assignees: | Scimed Life Systems, Inc. (Maple Grove, MN) |
| Claim: | What is claimed is as follows |
| Claim: | 1. A perfusion catheter comprising |
| Claim: | an elongated catheter shaft having proximal and distal ends; |
| Claim: | an inner member, at least a portion of the inner member extending beyond the distal end of the catheter shaft, the inner member having proximal and distal ends; |
| Claim: | a catheter tip mounted on the distal end of the inner member; |
| Claim: | a sheath having proximal and distal ends, at least a portion of the sheath extending distally to cover at least a portion of the inner member extending beyond the distal end of the catheter shaft, the distal end of the sheath abutting the catheter tip to form a chamber extending between the inner member and the sheath and between the catheter tip and distal end of the catheter shaft, the sheath including at least one proximal perfusion opening in the portion of the sheath that covers at least a portion of the inner tube; |
| Claim: | the catheter tip including at least one distal perfusion opening therethrough opening directly into the chamber |
| Claim: | whereby fluid may flow through the at least one distal perfusion opening, through the chamber and through the at least one proximal perfusion opening. |
| Claim: | 2. The perfusion catheter of claim 1 further comprising a stent mounted over the distal end of the inner member and underneath the sheath. |
| Claim: | 3. The perfusion catheter of claim 2 wherein the sheath is retractable, the sheath in an unretracted position covering the stent and the sheath in the retracted position exposing the stent for deployment. |
| Claim: | 4. The perfusion catheter of claim 3 further comprising a pull back mechanism for retracting the sheath, the pull back mechanism operatively connected to the sheath. |
| Claim: | 5. The perfusion catheter of claim 4 wherein the pull back mechanism comprises a pull collar assembly having a pull wire attached thereto, the pull wire extending to the proximal end of the catheter. |
| Claim: | 6. The perfusion catheter of claim 2 wherein the stent is self-expanding. |
| Claim: | 7. The perfusion catheter of claim 2 further comprising an inflation lumen at least a portion of which is carried within the catheter shaft and a balloon mounted over the distal end of the inner member at least a portion of the balloon mounted under the stent, the balloon in fluid communication with the inflation lumen, the stent being balloon expandable. |
| Claim: | 8. The perfusion catheter of claim 2 comprising at least one bumper mounted over the inner tube and abutting the stent, the bumper having at least bumper perfusion opening therein. |
| Claim: | 9. The perfusion catheter of claim 2 wherein the catheter tip has four distal perfusion openings therein. |
| Claim: | 10. The perfusion catheter of claim 2 wherein the proximal end of the sheath includes a tapered narrowing transition portion having four proximal perfusion openings therein. |
| Claim: | 11. A method of delivering a stent to a desired location in a bodily vessel while maintaining perfusion of the vessel distal to the desired location comprising the steps of |
| Claim: | providing a perfusion catheter as in claim 2; |
| Claim: | delivering the stent using the perfusion catheter to the desired bodily location; |
| Claim: | retracting the sheath; |
| Claim: | deploying the stent; |
| Claim: | removing the catheter from the bodily vessel. |
| Claim: | 12. The perfusion catheter of claim 1 wherein the inner member is an inner tube having proximal and distal ends, at least a portion of the inner tube carried within the catheter shaft. |
| Claim: | 13. The perfusion catheter of claim 12 wherein the catheter shaft has a guide wire port therein proximal to the sheath, the proximal end of the inner tube terminating in the guide wire port, the catheter in rapid-exchange form. |
| Claim: | 14. The perfusion catheter of claim 12 wherein the inner tube extends from the proximal end of the catheter to the distal end, the catheter in over-the-wire form. |
| Claim: | 15. The perfusion catheter of claim 1 which is self priming when inserted in a bodily vessel and exposed to arterial blood pressure, whereby blood entering the at least one distal perfusion opening forces air out of the chamber through the at least one proximal perfusion opening. |
| Claim: | 16. The perfusion catheter of claim 1 wherein the catheter is a fixed wire catheter and the inner member is an inner tube, the catheter further comprising a guide wire, at least a portion of which is carried within the inner tube. |
| Claim: | 17. The perfusion catheter of claim 1 in combination with a guidewire. |
| Claim: | 18. The perfusion catheter of claim 1 wherein the sheath extends distally from the distal end of the catheter shaft and the proximal end of the sheath includes a tapered narrowing transition portion, the at least one proximal perfusion opening extending through the tapered portion. |
| Claim: | 19. The perfusion catheter of claim 1 in combination with a guide catheter, the catheter shaft and sheath each having an outer diameter less than the inner diameter of the guide catheter. |
| Claim: | 20. The perfusion catheter of claim 1 wherein the sheath is a full length sheath extending proximally over the proximal end of the catheter shaft. |
| Claim: | 21. A method of delivering a treatment device to a desired location in a bodily vessel while maintaining perfusion of the vessel distal to the desired location comprising the steps of |
| Claim: | providing a self-priming perfusion catheter having |
| Claim: | a retractable sheath having proximal and distal ends, the proximal end of the sheath mounted on the distal end of the catheter shaft, the sheath extending distally to cover the inner member extending beyond the distal end of the catheter shaft and the distal end of the sheath abuts the catheter tip to form a chamber extending between the inner member and the sheath and between the catheter tip and distal end of the catheter shaft, the chamber including a tapered narrowing transition portion including at least one proximal perfusion opening; |
| Claim: | the catheter tip including at least one distal perfusion opening therethrough opening directly into the chamber; and |
| Claim: | a treatment device located at the distal end of the catheter shaft within the chamber; |
| Claim: | inserting the catheter into a bodily vessel against the flow of blood so that air is forced out of the proximal perfusion openings of the catheter chamber as blood flows in through the distal perfusion openings; |
| Claim: | delivering the treatment device to the desired bodily location; |
| Claim: | deploying the treatment device; |
| Claim: | 22. The method of claim 21 wherein the treatment device is a stent mounted over the distal end of the inner tube. |
| Claim: | 23. The method of claim 22 where the stent is self expanding. |
| Claim: | 24. The method of claim 22, the catheter further comprising an inflation lumen at least a portion of which is carried within the catheter shaft, and an inflatable balloon mounted over the distal end of the inner tube, at least a portion of the balloon underneath the stent, the balloon in fluid communication with the inflation lumen, the stent being balloon expandable. |
| Claim: | 25. The method of claim 21 wherein the treatment device comprises a fiber optic cable in communication with a radiation source. |
| Claim: | 26. A perfusion catheter comprising |
| Claim: | a sheath having proximal and distal ends, the proximal end of the sheath mounted on the distal end of the catheter shaft, the sheath extending distally to cover the portion of the inner member extending beyond the distal end of the catheter shaft and the distal end of the sheath abutting the catheter tip to form a chamber extending between the inner member and the sheath and between the catheter tip and distal end of the catheter shaft, the proximal end of the sheath including at least one proximal perfusion opening; |
| Current U.S. Class: | 604/102; 604/96; 606/194 |
| Current International Class: | A61M 2900 |
| Patent References Cited: | 4661094 April 1987 Simpson 4732152 March 1988 Wallsten et al. 5201757 April 1993 Heyn et al. 5360401 November 1994 Turnland 5368566 November 1994 Crocker 5534007 July 1996 St. Germain et al. 5573509 November 1996 Thornton 5632754 May 1997 Farley et al. 5690643 November 1997 Wijay 5700243 December 1997 Narciso, Jr. 5702364 December 1997 Euteneuer et al. 5891154 April 1999 Loeffler |
| Primary Examiner: | Coggins, Wynn Wood |
| Assistant Examiner: | Kline, Eric |
| Attorney, Agent or Firm: | Vidas, Arrett & Steinkraus |
| رقم الانضمام: | edspgr.06139524 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |