Transluminal Delivery System

• US 20150088242A1
• Filed: 11/28/2014
• Published: 03/26/2015
• Est. Priority Date: 05/29/2009
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Wubbeling, Martin, Dietrich, Daniel, Elsasser, Erhard, Walter, Beate
• Granted Patent: US 10,369,032 B2
• Time in Patent Office: Days
• US Class Current: 623/1.12
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• 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 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2210/0057 stretchable
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: Y10T 29/49863 with prestressing of part

Abstract

A transluminal delivery system and a method of assembling. The system includes a cylindrical, inner-catheter component and a retractable sheath surrounding the component and defining a space between the component and the sheath to receive a self-expanding luminal prosthesis between the component and the sheath. The inner-catheter component may include at least one sleeve having fibers, at least one connected sleeve portion connected to the inner catheter, and at least one unconnected sleeve portion slidably engaging the inner catheter such that when the sheath retracts, the unconnected portion expands and sleeve fibers engage the prosthesis'"'"'s luminal surface, wherein the engagement opposes proximal stent movement.

Claims

1. A transluminal delivery system, comprising:

a cylindrical, inner-catheter component and a retractable sheath surrounding the component and defining a space between the component and the sheath to receive a self-expanding luminal prosthesis between the component and the sheath wherein the inner-catheter component comprises at least one sleeve having;

fibers;

at least one connected sleeve portion connected to the inner catheter; and

at least one unconnected sleeve portion slidably engaging the inner catheter such that when the sheath retracts the unconnected portion expands and sleeve fibers engage the prosthesis'"'"'s luminal surface,

wherein the engagement opposes proximal stent movement.

2. The system of claim 1, wherein the sleeve is elastic and reduces its wall thickness when pulled.

3. The system of claim 2, wherein the fibers obliquely connect to the sleeve'"'"'s longitudinal axis.

4. The system of claim 2, wherein the sleeve comprises a fiber mesh.

5. The system of claim 4, wherein the fiber mesh is a braided cylinder.

6. The system claim 5, wherein the sleeve can expand to a varying extent at locations along its length.

7. The system claim 6, wherein the sleeve can expand more towards its distal than its proximal end.

8. The system of claim 7, further comprising at least two sleeves.

9. The system of claim 8, wherein at least one unconnected sleeve portion is between two connected sleeve portions.

10. The system of claim 1, wherein the unconnected sleeve portion connects to a slider and the slider connects to a sliding actuator.

11. A method of connecting a sheath-compressed, self-expanding stent to an inner catheter'"'"'s abluminal surface so that, upon delivery, the surface restrains the stent against axial movement relative to the inner catheter, while the sheath is retracted, the method comprising:

providing a sleeve, inlaying and touching the stent, wherein the sleeve can expand to a varying extent at locations along its length as its length decreases;

placing the sleeve within an annular gap between the stent'"'"'s luminal surface and the inner catheter'"'"'s abluminal surface; and

leaving sleeve portions unconnected to both the inner catheter and the stent, such that distal stent movement relative to the inner catheter increases the sleeve'"'"'s diameter, which increases engagement between the sleeve'"'"'s abluminal surface and the stent'"'"'s luminal surface,

wherein increased engagement resists further distal movement and the sleeve comprises fibers.

12. The method of claim 11, wherein the fibers are obliquely connected to the sleeve'"'"'s abluminal surface.

13. The method of claim 11, wherein the sleeve comprises a fiber mesh.

14. The method of claim 13, wherein the fiber mesh is a braided cylinder.

15. A method of assembling a transluminal delivery system and a prosthesis for a body lumen, the system comprising an inner catheter and comprising a sheath that is retractable to release the prosthesis into a body lumen, the inner catheter including a sleeve inlying the prosthesis and restraining the prosthesis from sliding as the sheath retracts, the method comprising:

providing a sleeve inlying and touching the stent, wherein the sleeve can expand to a varying extent at locations along its length as length decreases;

leaving sleeve portions unconnected to both the inner catheter and the stent, such that distal stent movement relative to the inner catheter expands the sleeve, such that the sleeve'"'"'s abluminal surface engages and the stent'"'"'s luminal surface more restricting further distal movement; and

stretching the sleeve lengthwise to temporarily reduce its diameter,

wherein;

the sleeve comprises fibers, and

the sleeve crumples along its length into a larger diameter portion when the stent slides in a direction from the unconnected portion to the connected portion.

16. The method of claim 15, wherein at least one unconnected sleeve portion can increase in diameter.

17. The method of claim 16, wherein the sleeve comprises a fiber mesh that is a braided cylinder.

18. The method of claim 17, further comprising axially pulling the sleeve into the prosthesis lumen.

19. The method of claim 18, wherein axially pulling the sleeve into the prosthesis lumen comprises stretching the sleeve.

20. The method of claim 19, wherein the sleeve expands more towards its distal end than its proximal end.