Methods of safely expanding prosthetic heart valves

Patent metadata

Field	Value
Publication number	US-11197757-B2
Application number	US-202016779429-A
Country	US
Kind code	B2
Filing date	Jan 31, 2020
Priority date	Sep 10, 2010
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

Methods of quickly and easily implanting a quick-connect heart valve prosthesis during a surgical procedure are provided. The heart valve may include a substantially non-expandable, non-compressible prosthetic valve and a plastically-expandable frame, thereby enabling attachment to the annulus without sutures. A system and method for deployment includes an integrated handle shaft and balloon catheter. A safety member disposed between the balloon catheter and handle shaft prevents premature catheter advancement prior to heart valve placement at the annulus, and also may prevent premature balloon inflation prior to full catheter advancement.

First claim

What is claimed is:

1. A method of delivery and implant of a prosthetic heart valve at a valve annulus, comprising:
providing a delivery system including:
a handle shaft having a lumen therethrough; and
an expansion catheter extending through the handle shaft having an expandable member on a distal end, the expansion catheter being capable of linear movement relative to the handle shaft from a retracted position to an advanced position, wherein the expansion catheter is a balloon catheter and the expandable member is a balloon, and the balloon catheter has a proximal luer connector;

providing a heart valve including a prosthetic valve having an expandable frame, the expandable frame having a contracted state for delivery to an implant position and an expanded state configured for outward connection to the annulus, the heart valve being mounted on a distal end of the handle shaft;
advancing the distal end of the handle shaft so that the heart valve with the expandable frame in its contracted state is located at the implant position adjacent the annulus;
ensuring that the expandable member cannot expand until the expansion catheter is displaced distally to the advanced position by covering the luer connector with a safety member;
displacing the expansion catheter distally to the advanced position and the expandable member is located within the expandable frame of the heart valve by removing the safety member from covering the luer connector; and
actuating the expandable member to convert the expandable frame from its contracted state to its expanded state.

2. The method of claim 1 , wherein the heart valve is fully expandable and mounts onto a flexible tubular valve holder connected to the distal end of the handle shaft, and inflation of the balloon expands the valve holder and the heart valve mounted thereon.

3. The method of claim 2 , wherein the valve holder has a proximal tubular extension that fits within a tubular adapter at the distal end of the handle shaft, the tubular extension and tubular adapter having interfering components that are locked together by assembly of a locking sleeve that fits closely around the tubular adapter enabling quick coupling and release of the heart valve and valve holder from the handle shaft.

4. The method of claim 2 , wherein the valve holder has a relatively thin distal sleeve portion formed of a material selected from the group consisting of: Nitinol, stainless steel, polymer, nylon, PET, PEEK, PE, polyether block amide, urethane, and PVC, and the heart valve is crimped onto the sleeve portion for delivery.

5. The method of claim 4 , wherein the sleeve portion of the valve holder is formed as a braid or with laser cuts.

6. The method of claim 1 , wherein a proximal end of the expansion catheter projects proximally from out of the handle shaft, and the safety member engages in a first position between a portion of the expansion catheter that projects from the handle shaft and a proximal end of the handle shaft to prevent distal movement of the expansion catheter relative to the handle shaft, and the expandable member cannot expand until the safety member is displaced from the first position.

7. The method of claim 6 , wherein in the first position the safety member covers the proximal luer connector on the balloon catheter and ensures that the balloon cannot expand.

8. A method of delivery and implant of a prosthetic heart valve at a valve annulus, comprising:
providing a delivery system including:
a handle shaft having a lumen therethrough;
an expansion catheter extending through the handle shaft having an expandable member on a distal end, wherein the expansion catheter is a balloon catheter and the expandable member is a balloon, and the balloon catheter has a proximal luer connector; and
a safety member arranged in a first position on the handle shaft so as to prevent pre-mature expansion of the expansion member, the safety member being displaceable to a second position that permits expansion of the expansion member;

providing a heart valve including a prosthetic valve having an expandable frame, the expandable frame having a contracted state for delivery to an implant position and an expanded state configured for outward connection to the annulus, the heart valve being mounted on a distal end of the handle shaft;
advancing the distal end of the handle shaft so that the heart valve with the expandable frame in its contracted state is located at the implant position adjacent the annulus;
ensuring that the expandable member cannot expand until the safety member is displaced away from the first position by covering the luer connector with the safety member;
displacing the safety member away from the first position by removing the safety member from covering the luer connector; and
actuating the expandable member to convert the expandable frame from its contracted state to its expanded state.

9. The method of claim 8 , wherein the heart valve is fully expandable and mounts onto a flexible tubular valve holder connected to the distal end of the handle shaft, and inflation of the balloon expands the valve holder and the heart valve mounted thereon.

10. The method of claim 9 , wherein the valve holder has a relatively thin distal sleeve portion formed of a material selected from the group consisting of: Nitinol, stainless steel, polymer, nylon, PET, PEEK, PE, polyether block amide, urethane, and PVC, and the heart valve is crimped onto the sleeve portion for delivery.

11. The method of claim 10 , wherein the sleeve portion of the valve holder is formed as a braid or with laser cuts.

12. The method of claim 8 , wherein a proximal end of the expansion catheter projects proximally from out of the handle shaft, and the safety member engages between a portion of the expansion catheter that projects from the handle shaft and a proximal end of the handle shaft.

13. The method of claim 12 , wherein the expansion catheter is capable of linear movement relative to the handle shaft from a retracted position to an advanced position, and when in the first position the safety member prevents distal movement of the expansion catheter relative to the handle shaft.

14. The method of claim 8 , wherein the safety member comprises a locking clip that snaps onto a handpiece at the proximal end of the handle shaft and onto a proximal end of the expansion catheter, the locking clip preventing expansion of the expandable member.

15. A method of delivery and implant of a prosthetic heart valve at a valve annulus, comprising:
providing a delivery system including:
a handle shaft having a lumen therethrough; and
an expansion catheter extending through the handle shaft having an expandable member on a distal end, the expansion catheter being capable of linear movement relative to the handle shaft from a retracted position to an advanced position, wherein the expansion catheter is a balloon catheter and the expandable member is a balloon, and the balloon catheter has a proximal luer connector;

providing a heart valve including a prosthetic valve having an expandable frame, the expandable frame having a contracted state for delivery to an implant position and an expanded state configured for outward connection to the annulus, the heart valve being mounted on a distal end of the handle shaft;
advancing the distal end of the handle shaft so that the heart valve with the expandable frame in its contracted state is located at the implant position adjacent the annulus;
ensuring that the expandable member cannot expand until the expansion catheter is displaced distally to the advanced position by cov

Assignees

• Edwards Lifesciences Corp

Inventors

• Phung Andrew
• Yambao August R
• Kalam Faisal
• Brunnett William C
• Pintor Rafael
• Scott Michael J

Classifications

• G06V10/25

  Determination of region of interest [ROI] or a volume of interest [VOI] · CPC title

• G06F40/169

  Annotation, e.g. comment data or footnotes · CPC title

• A61F2220/0016

  with sharp anchoring protrusions, e.g. barbs, pins, spikes · CPC title

• A61F2220/0008

  Fixation appliances for connecting prostheses to the body · CPC title

• A61F2/2412

  with soft flexible valve members, e.g. tissue valves shaped like natural valves · CPC title