ROLL SLEEVE MECHANISM FOR PROXIMAL RELEASE STENT

• US 20110034987A1
• Filed: 07/29/2010
• Published: 02/10/2011
• Est. Priority Date: 08/04/2009
• Status: Abandoned Application

• Current Assignee: Wilson-Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Wilson-Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Kennedy, Kenneth C.
• Application Number:
  US12/846,294
• Publication Number:
  US 20110034987A1
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2/9662 the middle portion of the stent or stent-graft is released first
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A medical device for releasing expandable prostheses in a proximal to distal direction includes an elongate catheter, a flexible sleeve, and an expandable prosthesis. In one embodiment, the distal end of the flexible sleeve is disposed about the distal end of the elongate catheter. In order to deploy the expandable prosthesis, the flexible sleeve is pulled proximally through the lumen of the elongate catheter to expose the expandable prosthesis. An outer sheath and prosthesis retaining line may also be provided to allow the device to release an expandable prosthesis in the distal to proximal direction, or to allow the recapture of the expandable prosthesis after the flexible sleeve is fully withdrawn into the lumen of the elongate catheter.

Claims

1. A medical device comprising:

an elongate catheter having a distal end and a lumen extending therethrough;

a prosthesis receiving region disposed on said distal end of said elongate catheter;

an expandable prosthesis disposed about said prosthesis receiving region of said elongate catheter;

said medical device having a contracted delivery configuration and expanded delivery configuration;

a flexible sleeve everted upon itself, said flexible sleeve having a first and second portion and a distal end, said distal end of said flexible sleeve disposed about said distal end of said elongate catheter;

said first portion of said flexible sleeve being disposed about said expandable prosthesis in said contracted delivery configuration;

said second portion of said flexible sleeve being disposed about said first portion of said flexible sleeve in said contracted delivery configuration, wherein said second portion of said flexible, sleeve may be partially disposed within said lumen of said elongate catheter; and

said flexible sleeve configured to be pulled proximally within said lumen of said elongate catheter such that at least a portion of said second portion of said flexible sleeve is disposed within said elongate catheter in the expanded delivery configuration.

2. The medical device of claim 1 wherein said flexible sleeve is composed of expanded polytetrafluorethylene.

3. The medical device of claim 1 further comprising an outer sheath disposed about said elongate catheter and said flexible sleeve in the contracted delivery configuration.

4. The medical device of claim 3 wherein at least a portion of said elongate catheter distal of said prosthesis receiving region has substantially the same diameter as said outer sheath.

5. The medical device of claim 1 further comprising a prosthesis retaining line, said prosthesis retaining line attached to said expandable prosthesis and configured to release said expandable prosthesis.

6. The medical device of claim 1 further comprising a handle, said handle in communication with said second portion of said flexible sleeve such that when said handle is actuated said second portion of said flexible sleeve is pulled proximally within said elongate catheter.

7. A medical device comprising:

an elongate catheter having a distal end and a lumen;

an expandable prosthesis, said expandable prosthesis disposed upon said distal end of said elongate catheter;

a flexible sleeve everted upon itself, said flexible sleeve having a first portion and a second portion;

said first portion of said flexible sleeve disposed about said expandable prosthesis in a contracted delivery configuration;

said second portion of said flexible sleeve configured to be slidably urged within said lumen of said elongate catheter such that at least a portion of said second portion of said flexible sleeve is disposed within said elongate catheter in an expanded delivery configuration.

8. The medical device of claim 7 wherein said flexible sleeve is composed of expanded polytetrafluorethylene.

9. The medical device of claim 7 further comprising an outer sheath disposed about said elongate catheter and said flexible sleeve.

10. The medical device of claim 9 wherein at least a portion of said elongate catheter distal of said expandable prosthesis has substantially the same diameter as said outer sheath.

11. The medical device of claim 7 further comprising a prosthesis retaining line, said prosthesis retaining line attached to said expandable prosthesis and configured to release said expandable prosthesis.

12. The medical device of claim 7 further comprising a handle, said handle in communication with said second portion of said flexible sleeve such that when said handle is actuated said second portion of said flexible sleeve is pulled proximally within said elongate catheter.

13. A medical device comprising:

an elongate catheter having a distal end and a lumen extending therethrough;

a prosthesis receiving region disposed on said distal end of said elongate catheter;

an expandable prosthesis disposed about said prosthesis receiving region of said elongate catheter;

said medical device having a contracted delivery configuration and an expanded delivery configuration;

a flexible sleeve having a distal portion and a proximal portion, said flexible sleeve everted about said distal end of said elongate catheter in said contracted delivery configuration such that said distal portion of said flexible sleeve is disposed about said expandable prosthesis and said proximal portion is disposed within said lumen of said elongate catheter;

said flexible sleeve configured to be pulled proximally within said lumen of said elongate catheter such that at least a portion of said distal portion of said flexible sleeve is disposed within said elongate catheter in the expanded delivery configuration.

14. The medical device of claim 13 wherein said flexible sleeve is composed of expanded polytetrafluorethylene.

15. The medical device of claim 13 further comprising an outer sheath disposed about said elongate catheter and said flexible sleeve in the contracted delivery configuration.

16. The medical device of claim 15 wherein at least a portion of said elongate catheter distal of said prosthesis receiving region has substantially the same diameter as said outer sheath.

17. The medical device of claim 13 further comprising a prosthesis retaining line, said prosthesis retaining line attached to said expandable prosthesis and configured to release said expandable prosthesis.

18. The medical device of claim 13 further comprising a handle, said handle in communication with said proximal portion of said flexible sleeve such that when said handle is actuated said proximal portion of said flexible sleeve is pulled proximally within said elongate catheter.