Medical system for treating a left atrial appendage

Patent metadata

Field	Value
Publication number	US-11903589-B2
Application number	US-202117209938-A
Country	US
Kind code	B2
Filing date	Mar 23, 2021
Priority date	Mar 24, 2020
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

A medical system may include a left atrial appendage closure device including an expandable framework and a proximal hub centered on a central longitudinal axis of the framework. An insert may be disposed within the proximal hub and include a collar configured to engage the proximal hub, a recess extending into the insert from a proximal end, and a post member disposed within the recess. The post member may be radially spaced apart from the collar and may extend proximally from a distal end of the recess to a proximal surface. The insert may include a first connection structure disposed distal of the proximal surface. The medical system may include a delivery catheter having a second connection structure configured to engage the first connection structure in a delivery configuration. The distal end of the delivery catheter includes a hollow portion configured to receive the post member in the delivery configuration.

First claim

What is claimed is:

1. A medical system, comprising:
a left atrial appendage closure device including an expandable framework and a proximal hub centered on a central longitudinal axis of the expandable framework;
wherein an insert is disposed within the proximal hub, the insert including a circumferential wall and a collar configured to engage the proximal hub, a recess extending into the insert from a proximal end of the insert, and a post member disposed within the recess;
wherein the post member is radially spaced apart from the circumferential wall to define a gap between the post member and the circumferential wall, and the post member extends proximally from a distal end of the recess to a proximal surface of the post member;
wherein the insert includes a first connection structure disposed within the recess;
and
a delivery catheter having a second connection structure proximate a distal end of the delivery catheter, the second connection structure being configured to engage the first connection structure in a delivery configuration of the medical system;
wherein the insert includes a gap seal extending radially across the gap and covering a proximal end of the gap when the medical system is disposed in a released configuration in which the delivery catheter is disengaged from the left atrial appendage closure device;
wherein the distal end of the delivery catheter includes a hollow portion configured to receive the post member in the delivery configuration;
wherein the gap seal is fixedly attached to only one of the circumferential wall or the post member and extends across the proximal end of the gap to engage the other of the circumferential wall or the post member when the medical system is disposed in the released configuration.

2. The medical system of claim 1 , wherein a sensor is disposed within the post member.

3. The medical system of claim 2 , wherein the sensor is a pressure sensor and the proximal surface is a diaphragm extending across a proximal end of the post member, the diaphragm being configured to transmit a pressure within a left atrium to the pressure sensor when the expandable framework is disposed within an ostium of the left atrial appendage.

4. The medical system of claim 3 , wherein the delivery catheter includes at least one aperture extending through a side wall of the delivery catheter proximate the distal end of the delivery catheter.

5. The medical system of claim 1 , wherein the gap seal is configured to deflect into the recess when the medical system is in the delivery configuration.

6. The medical system of claim 1 , wherein the first connection structure includes a first threaded portion disposed on an outside surface of the post member or an inside surface of the collar.

7. The medical system of claim 6 , wherein the second connection structure includes a second threaded portion disposed proximate the distal end of the delivery catheter, the second threaded portion being configured to threadably mate with the first threaded portion when the medical system is in the delivery configuration.

8. The medical system of claim 1 , wherein the first connection structure includes at least one groove formed in an outside surface of the post member or an inside surface of the collar, wherein the at least one groove includes a longitudinal portion and a circumferential portion extending from a distal end of the longitudinal portion.

9. The medical system of claim 8 , wherein the second connection structure includes at least one radially extending projection proximate the distal end of the delivery catheter, the at least one radially extending projection being configured to engage the at least one groove when the medical system is in the delivery configuration.

10. The medical system of claim 1 , wherein the first connection structure includes at least one projection extending radially outward from the post member.

11. The medical system of claim 10 , wherein the second connection structure includes two or more movable jaws configured to engage the at least one projection to clamp the post member between the two or more movable jaws when the medical system is in the delivery configuration.

12. The medical system of claim 1 , wherein the first connection structure includes a channel formed in an outside surface of the post member and extending circumferentially around the post member distal of the proximal surface.

13. The medical system of claim 12 , wherein the second connection structure includes:
a distal cap member disposed at the distal end of the delivery catheter and configured to span the proximal surface of the post member, wherein the distal cap member includes at least one aperture formed in a laterally extending surface of the distal cap member; and
a tether extending longitudinally alongside the delivery catheter, through the at least one aperture, and around the post member within the channel when the medical system is in the delivery configuration.

14. A medical system, comprising:
a left atrial appendage closure device including an expandable framework and a proximal hub centered on a central longitudinal axis of the expandable framework;
wherein an insert is disposed within the proximal hub, the insert including a collar defining a circumferential wall of the insert configured to engage the proximal hub, a recess extending axially into the insert from a proximal end of the insert, and a post member disposed within the recess;
wherein the post member is radially spaced apart from the circumferential wall to define an annular gap between the post member and the circumferential wall, and the post member extends proximally from a distal end of the recess to a proximal surface of the post member;
wherein the insert includes a first connection structure disposed within the recess distal of the proximal surface of the post member;
wherein a pressure sensor is disposed within the post member and in communication with the proximal surface of the post member for sensing a fluid pressure proximal of the left atrial appendage closure device;
and
a delivery catheter having a second connection structure proximate a distal end of the delivery catheter, the second connection structure being configured to engage the first connection structure in a delivery configuration of the medical system;
wherein the insert includes a gap seal extending radially across the annular gap and covering a proximal end of the annular gap when the medical system is disposed in a released configuration in which the delivery catheter is disengaged from the left atrial appendage closure device;
wherein the distal end of the delivery catheter includes a hollow portion configured to extend over the post member and within the circumferential wall in the delivery configuration such that the distal end of the delivery catheter is disposed distal of the proximal end of the insert;
wherein the gap seal is fixedly attached to only one of the circumferential wall or the post member and extends across the proximal end of the annular gap to engage the other of the circumferential wall or the post member when the medical system is disposed in the released configuration.

15. A medical system, comprising:
a left atrial appendage closure device including a self-expanding framework and a proximal hub centered on a central longitudinal axis of the expandable framework;
wherein an insert is disposed within the proximal hub, the insert including a collar defining a circumferential wall of the insert configured to engage the proximal hub, a recess extending axially into the insert from a proximal end of the insert,

Assignees

• Boston Scient Scimed Inc

Inventors

• Stahmann Jeffrey E
• Mi Bin
• Wedul Eric
• Maile Keith R

Classifications

• A61B17/12122 Primary

  within the heart (for closing a cardiac septal defect A61B17/0057) · CPC title

• A61B17/12031

  complete occlusion · CPC title

• A61B17/12131

  characterised by the type of occluding device · CPC title

• A61B2017/00221

  with wireless transmission of data, e.g. by infrared radiation or radiowaves · CPC title

• A61B2017/12095

  Threaded connection · CPC title