Method and apparatus for compressing/loading stent-valves

Patent metadata

Field	Value
Publication number	US-12138162-B2
Application number	US-202318462684-A
Country	US
Kind code	B2
Filing date	Sep 7, 2023
Priority date	Sep 16, 2013
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

Apparatus (40) for compressing a transcatheter cardiac stent-valve (10) comprises: a first compressor stage (100) including a hollow channel (42) with a tapered interior surface configured for compressing a stent-valve in response to longitudinal advancement of the stent-valve within the channel; and a second compressor stage (102) comprising a crimper for compressing a portion of the stent-valve without longitudinal advancement.

First claim

The invention claimed is:

1. A loading system for use in compressing and/or loading a stent-valve for a delivery catheter, the loading system comprising:
a distal sheath configured for compressing and covering a distal portion of the stent-valve;
a proximal sheath configured for compressing and covering a proximal portion of the stent-valve;
a plurality of segments configured to be disposed over the proximal sheath, the plurality of segments alone define a tubular shape that has a form fit over the proximal sheath; and
a retainer configured to be disposed over and retain the plurality of segments in the tubular shape.

2. The loading system of claim 1 , wherein at least a portion of at least one of the plurality of segments is made of a transparent material.

3. The loading system of claim 2 , wherein the retainer includes an overtube disposable around the plurality of segments.

4. The loading system of claim 3 , wherein the overtube has a viewing window configured to allow viewing of the stent-valve through the viewing window.

5. The loading system of claim 3 , wherein the overtube is made of a transparent material.

6. The loading system of claim 3 , wherein the retainer further includes a separate threaded nut securable to a mouth of the overtube.

7. The loading system of claim 1 , wherein the plurality of segments is only two segments.

8. The loading system of claim 1 , further comprising an intermediate tube configured to slide over and have a form fit over a portion of at least one of the distal and proximal sheaths.

9. The loading system of claim 1 , further comprising an interior support configured to be fitted to a distal end of the delivery catheter and configured to apply a counterforce to the distal end of the delivery catheter to balance a force needed for forcibly translating the proximal sheath over the stent-valve.

10. The loading system of claim 1 , wherein a total length of the retainer is less than a total length of the plurality of segments.

11. A loading system for use in compressing and/or loading a stent-valve for a delivery catheter, the loading system comprising:
a distal sheath configured for compressing and covering a distal portion of the stent-valve;
a proximal sheath configured for compressing and covering a proximal portion of the stent-valve;
only two transparent segments configured to be disposed over the proximal sheath, the two segments alone define a tubular shape that has a form fit over the proximal sheath; and
a retainer configured to be disposed over and retain the two segments in the tubular shape.

12. The loading system of claim 11 , wherein the retainer includes an overtube disposable around the two segments.

13. The loading system of claim 12 , wherein the overtube has a viewing window configured to allow viewing of the stent-valve through the viewing window.

14. The loading system of claim 12 , wherein the overtube is made of a transparent material.

15. The loading system of claim 12 , wherein the retainer further includes a separate threaded nut securable to a mouth of the overtube.

16. The loading system of claim 11 , further comprising an interior support configured to be fitted to a distal end of the delivery catheter and configured to apply a counterforce to the distal end of the delivery catheter to balance a force needed for forcibly translating the proximal sheath over the stent-valve.

17. The loading system of claim 11 , wherein a total length of the retainer is less than a total length of the two segments.

18. A loading system for use in compressing and/or loading a stent-valve for a delivery catheter, the loading system comprising:
a distal sheath configured for compressing and covering a distal portion of the stent-valve;
a proximal sheath configured for compressing and covering a proximal portion of the stent-valve;
a plurality of segments configured to be disposed over the proximal sheath, the plurality of segments alone define a tubular shape that has a form fit over the proximal sheath;
a retainer configured to be disposed over and retain the plurality of segments in the tubular shape; and
an interior support configured to be fitted to a distal end of the delivery catheter and configured to apply a counterforce to the distal end of the delivery catheter to balance a force needed for forcibly translating the proximal sheath over the stent-valve.

19. The loading system of claim 18 , wherein a total length of the retainer is less than a total length of the plurality of segments.

20. The loading system of claim 18 , wherein the retainer includes an overtube disposable around the plurality of segments, wherein at least a portion of at least one of the plurality of segments is made of a transparent material, and the overtube has a viewing window configured to allow viewing of the stent-valve through the viewing window.

Assignees

• Symetis Sa

Inventors

• Mantanus Luc
• Lombardi Fabien
• Simonin Pierre
• Biadillah Youssef
• Hefti Jean-Luc
• Delaloye Stephane

Classifications

• A61F2/9522

  Means for mounting a stent or stent-graft onto or into a placement instrument · CPC title

• A61F2250/0091

  transparent or translucent · CPC title

• A61F2250/0018

  differing in elasticity, stiffness or compressibility · CPC title

• A61F2230/0054

  V-shaped · CPC title

• A61F2220/0008

  Fixation appliances for connecting prostheses to the body · CPC title