CA2555482C - Stent delivery system - Google Patents
Stent delivery system Download PDFInfo
- Publication number
- CA2555482C CA2555482C CA2555482A CA2555482A CA2555482C CA 2555482 C CA2555482 C CA 2555482C CA 2555482 A CA2555482 A CA 2555482A CA 2555482 A CA2555482 A CA 2555482A CA 2555482 C CA2555482 C CA 2555482C
- Authority
- CA
- Canada
- Prior art keywords
- retractable
- sheath
- membrane
- stent
- medical device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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
- A61F2/95—Instruments specially adapted for placement or removal of 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
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/9517—Instruments specially adapted for placement or removal of stents or stent-grafts handle assemblies therefor
Abstract
A medical device for delivery of a self-expanding stent comprises a catheter assembly (10) having a catheter shaft (12) and a self-expanding stent (30) disposed thereabout. A retractable sheath (40) is disposed about the catheter shaft and the stent. The retractable sheath retains the stent in a reduced diameter condition prior to delivery. A retractable membrane (60) is also disposed about the catheter shaft and the stent prior to delivery. Prior to delivery a first portion (64) of the membrane is positioned between the stent and the retractable sheath. A second portion (66) of the retractable membrane extends from the first portion and is positioned radially external of the retractable sheath. The retractable sheath and the retractable membrane are independently moveable relative to one another.
Claims (20)
1. A medical device for delivery of a self-expanding stent comprising:
a catheter having a catheter shaft, a self-expanding stent disposed about a stent receiving region of the catheter shaft;
a retractable sheath disposed about the catheter shaft and the stent, the retractable sheath having an internal surface and an external surface; and a retractable membrane, prior to delivery of the stent a first portion of the retractable membrane being positioned between the stent and the inner surface of the retractable sheath, a second portion of the retractable membrane extends from the first portion and along the external surface of the retractable sheath, the retractable sheath and the retractable membrane being independently moveable relative to one another.
a catheter having a catheter shaft, a self-expanding stent disposed about a stent receiving region of the catheter shaft;
a retractable sheath disposed about the catheter shaft and the stent, the retractable sheath having an internal surface and an external surface; and a retractable membrane, prior to delivery of the stent a first portion of the retractable membrane being positioned between the stent and the inner surface of the retractable sheath, a second portion of the retractable membrane extends from the first portion and along the external surface of the retractable sheath, the retractable sheath and the retractable membrane being independently moveable relative to one another.
2. The medical device of claim 1 wherein at least a portion of the stent is coated with at least one therapeutic agent.
3. The medical device of claim 2 wherein the at least one therapeutic agent comprises at least one drug.
4. The medical device of claim 1 wherein the retractable membrane comprises a first end, the first end being fixedly engaged to a portion of the catheter shaft proximal to the stent receiving region.
5. The medical device of claim 4 further comprising a retaining collar, the retaining collar fixedly retaining the first end of the membrane to the catheter shaft.
6. The medical device of claim 4 wherein the first portion of the retractable membrane extends distally from the first end to a distal end of the retractable sheath, the retractable membrane being wrapped around the distal end of the retractable sheath.
7. The medical device of claim 6 wherein the second portion of the retractable membrane extends proximally from the distal end of the retractable sheath to a second end of the retractable membrane.
8. The medical device of claim 7 wherein the second end of the retractable membrane is fixedly engaged to a retraction collar, the retraction collar being disposed about a portion of the retractable sheath and independently slideable relative thereto.
9. The medical device of claim 8 further comprising a retraction member, the retraction member being engaged to the retraction collar and extending proximally therefrom.
10. The medical device of claim 9 wherein the retractable sheath defines an opening therethrough, the retraction sheath and the catheter shaft defining a lumen therebetween, the opening being in communication with the lumen, the retraction member extending through the opening and into the lumen.
11. The medical device of claim 1 wherein the retractable membrane is constructed of a polymer of at least one member of the group consisting of polyester, polyamide, polyethylene terephalate polyester, crosslinked polyethylene, polyurethane, plasticized polyvinylchloride, polytetrafluoroethylene, and any combination thereof.
12. The medical device of claim 1 wherein the retractable membrane comprises a plurality of separate strips of membrane material.
13. The medical device of claim 1 wherein the retractable sheath is constructed of at least one sheath material and the retractable membrane is constructed of at least one membrane material, wherein the at least one sheath material is more rigid than the at least one membrane material.
14. The medical device of claim 1 further comprising a lubricant, the lubricant positioned on at least a portion of the retractable membrane.
15. The medical device of claim 14 wherein the lubricant is selected from at least one member of the group consisting of: hydrogels, silicone and polydimethylsiloxane.
16. The medical device of claim 1 further comprising a retraction device, the retraction device being actuatable between a non-retracted position and a retracted position, wherein in the retracted position the retractable sheath and the retractable membrane are retracted from about the stent.
17. The medical device of claim 16 wherein the retraction device comprises a first mechanism and a second mechanism, the first mechanism operably engaged to the retractable sheath, the second mechanism operably engaged to the retractable membrane, wherein actuation of the retraction device causes the second mechanism to provide the retractable membrane with a rate of retraction from the stent about twice that of the rate provided by the first mechanism to the retractable sheath from the stent.
18. The medical device of claim 17 wherein the retraction device comprises a screw drive.
19. The medical device of claim 17 wherein the retraction device comprises a triple pinion.
20. A medical device for delivery of a self-expanding stent comprising:
a catheter, the catheter having a catheter shaft, a portion of the catheter shaft defining a stent receiving region;
a self-expanding stent, the stent being expandable from a reduced state to an expanded slate, in the reduced state the stent having a diameter less than the diameter in the expanded state;
a retaining sheath, the retaining sheath being disposed about the catheter shaft and being longitudinally moveable relative thereto, the retaining sheath being moveable between a retaining position and a withdrawn position, in the retaining position a portion of the retaining sheath being disposed about the stent receiving region and retaining the stent in the reduced state, in the withdrawn position the sheath being removed from the stent receiving region; and a rolling membrane, the rolling membrane being moveable from a covered configuration to a withdrawn configuration, the rolling membrane having a first end, a second end and inside region and an outside region, the first end being fixedly engaged to a portion of the catheter shaft proximal to the stent receiving region, the inside region positioned between the catheter shaft and the retaining sheath and extending distally from the first end to a distal end of the retaining sheath, the outside region extending to the second end external of the retaining sheath, the outside region extending proximally from the inside region, the second end being engaged to a retraction member, in the covered configuration the inside region positioned between the stent and the retaining sheath, in the withdrawn configuration the rolling membrane being withdrawn from about the stent.
a catheter, the catheter having a catheter shaft, a portion of the catheter shaft defining a stent receiving region;
a self-expanding stent, the stent being expandable from a reduced state to an expanded slate, in the reduced state the stent having a diameter less than the diameter in the expanded state;
a retaining sheath, the retaining sheath being disposed about the catheter shaft and being longitudinally moveable relative thereto, the retaining sheath being moveable between a retaining position and a withdrawn position, in the retaining position a portion of the retaining sheath being disposed about the stent receiving region and retaining the stent in the reduced state, in the withdrawn position the sheath being removed from the stent receiving region; and a rolling membrane, the rolling membrane being moveable from a covered configuration to a withdrawn configuration, the rolling membrane having a first end, a second end and inside region and an outside region, the first end being fixedly engaged to a portion of the catheter shaft proximal to the stent receiving region, the inside region positioned between the catheter shaft and the retaining sheath and extending distally from the first end to a distal end of the retaining sheath, the outside region extending to the second end external of the retaining sheath, the outside region extending proximally from the inside region, the second end being engaged to a retraction member, in the covered configuration the inside region positioned between the stent and the retaining sheath, in the withdrawn configuration the rolling membrane being withdrawn from about the stent.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/832,619 | 2004-04-27 | ||
| US10/832,619 US7285130B2 (en) | 2004-04-27 | 2004-04-27 | Stent delivery system |
| PCT/US2005/011349 WO2005107644A1 (en) | 2004-04-27 | 2005-04-01 | Stent delivery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2555482A1 CA2555482A1 (en) | 2005-11-17 |
| CA2555482C true CA2555482C (en) | 2012-08-14 |
Family
ID=34968056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2555482A Expired - Fee Related CA2555482C (en) | 2004-04-27 | 2005-04-01 | Stent delivery system |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7285130B2 (en) |
| EP (1) | EP1758520B1 (en) |
| JP (1) | JP4732447B2 (en) |
| AT (1) | ATE509599T1 (en) |
| CA (1) | CA2555482C (en) |
| WO (1) | WO2005107644A1 (en) |
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| JP4732447B2 (en) | 2011-07-27 |
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