Medical device including attachable tip member

Patent metadata

Field	Value
Publication number	US-11723767-B2
Application number	US-202016992597-A
Country	US
Kind code	B2
Filing date	Aug 13, 2020
Priority date	Aug 15, 2019
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

Medical device delivery systems and methods for making and using medical device delivery systems are disclosed. An example delivery system for an implantable medical device includes an implantable heart valve including an inner shaft having a proximal end region, a distal end region and a first engagement member disposed along a portion of the distal end region and a tip assembly configured to attach to the inner shaft. The tip assembly includes a nosecone having a distal end region and a proximal end region, a second engagement member disposed within at least a portion of the nosecone, the second engagement member including a first locking member, the first locking member configured to deflect from a first position to a second engaged position. Further, attaching the tip assembly to the inner shaft includes deflecting the first locking member such that the locking member is coupled to the first engagement member.

First claim

What is claimed is:

1. A system for delivering an implantable heart valve, comprising:
an inner shaft having a proximal end region, a distal end region and a first engagement member disposed along a portion of the distal end region; and
a tip assembly having a longitudinal axis and being configured to attach to the inner shaft, the tip assembly including:
a nosecone having a distal end region and a proximal end region;
a second engagement member disposed within at least a portion of the nosecone, the second engagement member including a first locking member, the first locking member having a fixed proximal end, a free distal end, and a length extending therebetween parallel to the longitudinal axis, the first locking member tapering radially inward from the fixed proximal end to the free distal end, the first locking member configured to deflect from a first position to a second engaged position;

wherein attaching the tip assembly to the inner shaft includes deflecting the first locking member such that the first locking member is coupled to the first engagement member;
wherein the first engagement member includes a first shoulder portion, a second shoulder portion and a recessed portion located between the first shoulder portion and the second shoulder portion.

2. The system of claim 1 , further comprising a collar disposed along a portion of the second engagement member adjacent the first locking member.

3. The system of claim 1 , wherein the recessed portion includes an outer surface, and wherein the outer surface of the recessed portion is positioned radially inward of an outer surface of the first shoulder portion and an outer surface of the second shoulder.

4. The system of claim 3 , wherein the first locking member is configured to be disposed along the outer surface of the recessed portion when in the second engaged position, thereby fixing the tip assembly to the inner shaft and preventing removal therefrom.

5. The system of claim 4 , wherein the collar is configured to mask a portion of the second engagement member.

6. The system of claim 5 , wherein the second engagement member includes a first lumen extending therein, and wherein the distal end region of the inner shaft is configured to be inserted into the first lumen of the second engagement member.

7. The system of claim 6 , wherein engagement of the first shoulder portion and the first locking member is designed to limit movement of the tip assembly along the longitudinal axis.

8. The system of claim 7 , wherein the distal end region of the nosecone includes a tapered portion.

9. The system of claim 8 , wherein the second engagement member includes a second locking member having a radially inward distal taper spaced circumferentially away from the first locking member, the second locking member configured to deflect from a first position to a second engaged position.

10. The system of claim 9 , wherein the second locking member is configured to be disposed along the outer surface of the recessed portion when the second locking member is in the second engaged position.

11. The system of claim 1 , wherein the nosecone includes a base portion, the base portion having an outer diameter and a length, and wherein a ratio of the outer diameter of the base portion to the length of the base portion is between 0.5 to 3.0.

12. A system for delivering an implantable heart valve, comprising:
an inner shaft having a proximal end region, a distal end region and a first engagement member disposed along a portion of the distal end region;
a tip member having a longitudinal axis and being configured to be attached to the inner shaft, the tip member including a nosecone having a distal end region and a proximal end region, a second engagement member disposed within at least a portion of the nosecone, the second engagement member including a first locking member having a fixed proximal end, a free distal end, and a length extending therebetween parallel to the longitudinal axis, the first locking member tapering radially inward from the fixed proximal end to the free distal end, and a second locking member having a fixed proximal end, a free distal end, and a length extending therebetween parallel to the longitudinal axis, the second locking member tapering radially inward from the fixed proximal end to the free distal end, the second locking member spaced circumferentially away from the first locking member; and
a collar disposed along a portion of the second engagement member, wherein the collar is positioned radially outward of both the first locking member and the second locking member;
wherein both the first locking member and the second locking member are configured to deflect from a first position to a second engaged position;
wherein the first locking member and the second locking member are configured to fixedly attach the tip member to the inner member when in the second engaged position.

13. The system of claim 12 , wherein the first engagement member includes a first shoulder portion, a second shoulder portion and a recessed portion located between the first shoulder portion and the second shoulder portion.

14. The system of claim 13 , wherein the recessed portion includes an outer surface, and wherein the outer surface of recessed portion is positioned radially inward of an outer surface of the first shoulder portion and an outer surface of the second shoulder portion.

15. The system of claim 14 , wherein both the first locking member and the second locking member are configured to be disposed along the outer surface of the recessed portion when in the second engaged position.

16. The system of claim 15 , wherein the collar is configured to mask a portion of the second engagement member.

17. The system of claim 16 , wherein engagement of the first shoulder portion with the first locking member and the first shoulder portion with the second locking member is designed to limit movement of the tip member along the longitudinal axis.

18. The system of claim 17 , wherein the nosecone includes a base portion, the base portion having an outer diameter and a length, and wherein a ratio of the outer diameter of the base portion to the length of the base portion is between 0.5 to 3.0.

19. A method for delivering an implantable heart valve, the method comprising:
attaching a tip member to an inner catheter of a medical device delivery system, the medical device delivery system including the implantable heart valve;
wherein attaching the tip member to the inner catheter includes inserting a first engagement member disposed along a distal end region of the inner catheter into a second engagement member of the tip member, the second engagement member including at least a first locking member having a fixed proximal end, a free distal end and a length extending therebetween parallel to a longitudinal axis of the tip member, the first locking member tapering radially inward from the fixed proximal end to the free distal end, and wherein inserting the first engagement member into the second engagement member includes deflecting at least the first locking member from a first position to a second engaged position thereby fixedly locking the tip member to the inner catheter and preventing removal therefrom;
wherein the first engagement member includes a first shoulder portion, a second shoulder portion and a recessed portion located between the first shoulder portion and the second shoulder portion,
advancing the medical device delivery system to a target site adjacent a heart;
deploying the i

Assignees

• Boston Scient Scimed Inc

Inventors

• Poppe Kevin Robert
• Foster Daniel J
• Scheff Christopher Jay
• Swehla Bradley S

Classifications

• A61F2/2436 Primary

  Deployment by retracting a sheath · CPC title

• A61M25/0068

  Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure · CPC title

• A61M25/0082

  Catheter tip comprising a tool · CPC title

• A61M2025/0096

  being laterally outward extensions or tools, e.g. hooks or fibres · CPC title