Low Profile Heart Valve Delivery System and Method

• US 20140018911A1
• Filed: 07/11/2013
• Published: 01/16/2014
• Est. Priority Date: 07/12/2012
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Zhou, Pu, Wang, Huisun, Feng, James Q.
• Granted Patent: US 9,259,315 B2
• Time in Patent Office: Days
• US Class Current: 623/2.11
• CPC Class Codes: A61F 2/2418 Scaffolds therefor, e.g. support stents
• CPC Class Codes: A61F 2/2427 Devices for manipulating or deploying heart valves during implantation
• CPC Class Codes: A61F 2/2436 Deployment by retracting a sheath
• 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 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A heart valve delivery system includes a low-profile catheter having an outer sheath, the outer sheath having therein a stent and a replacement heart valve. In an unemployed configuration, the stent is located distally to the replacement heart valve. Upon deployment, however, the stent and replacement heart valve are expanded and the replacement heart valve is situated within the stent.

Claims

1. A percutaneous heart valve delivery system having a first configuration and a second configuration, the system comprising:

a sheath;

a stent having a proximal end and a distal end;

a replacement valve having a proximal end and a distal end;

at least one suture line extending between the stent and replacement valve;

wherein, when the system is in the first configuration, the stent and replacement valve are disposed within the sheath and the distal end of the replacement valve is proximal to the proximal end of the stent; and

when the system is in the second configuration, the distal end of the replacement valve is distal to the proximal end of the stent.

2. The system of claim 1, wherein the stent is self-expanding.

3. The system of claim 1, wherein the replacement heart valve is self-expanding.

4. The system of claim 1 further comprising at least one pull line, wherein the sheath has a proximal end and a distal end and the at least one pull line extends beyond the proximal end of the sheath.

5. The system of claim 1, wherein the at least one suture line extends through a portion of the replacement valve and through a portion of the stent.

6. The system of claim 1, wherein the at least one suture line comprises between six and twenty suture lines.

7. The system of claim 6 further comprising a plurality of pull lines, each of the pull lines connected to one of the suture lines when the system is in a first configuration.

8. The system of claim 1, wherein at least a portion of the at least one suture line comprises a bioabsorbable material.

9. A percutaneous heart valve delivery system having a first configuration and a second configuration, the system comprising:

a sheath;

a stent having a proximal end, a distal end, and an annular locking slot;

a replacement valve having a proximal end, a distal end, and an annularly shaped protruding member;

when the system is in the first configuration, the stent and replacement valve are disposed within the sheath and the distal end of the replacement valve is proximal to the proximal end of the stent; and

when the system is in the second configuration, the distal end of the replacement valve is distal to the proximal end of the stent and the protruding member is located within the locking slot.

10. A method of deploying a replacement heart valve comprising:

providing a percutaneous heart valve delivery system comprising;

a sheath;

a stent;

a replacement heart valve; and

at least one suture line;

inserting the heart valve delivery system through a body lumen;

deploying the stent from the sheath;

expanding the stent;

deploying the replacement heart valve from the sheath; and

pulling on the at least one suture line, thereby moving the replacement heart valve into contact with the stent.