Distal release retrieval assembly and related methods of use

• US 8,551,111 B2
• Filed: 02/06/2012
• Issued: 10/08/2013
• Est. Priority Date: 02/28/2005
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Richardson, Kevin
• Primary Examiner(s): SEVERSON, RYAN J
• Application Number:
  US13/366,892
• Publication Number:
  US 20120136368A1
• Time in Patent Office: 610 Days
• Field of Search: 606/110, 606/113, 606/114, 606/127, 606/128, 606/200
• US Class Current: 606/127
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2215 having an open distal end

Abstract

A device and related method of use is provided for the capture and removal of various unwanted objects present within the body'"'"'s anatomical lumens. In an embodiment of the present disclosure, the device includes an external elongate member; an internal elongate member disposed within the external elongate member; and a retrieval assembly connected to the internal elongate member and retractable within and extendable from a lumen of the external elongate member. The retrieval assembly includes an end configured to be selectively open or substantially closed.

Claims

1. A medical device comprising:

an outer elongate member having a proximal end, a distal end, and a lumen extending therebetween;

an inner elongate member disposed within the lumen of the outer elongate member and extending along a longitudinal axis, the inner elongate member having a proximal end and a distal end region; and

a retrieval assembly extending generally parallel to the longitudinal axis of the inner elongate member and having a proximal end and a distal end, the retrieval assembly secured to the distal end region of the inner elongate member adjacent the proximal end of the retrieval assembly;

wherein the retrieval assembly includes a self-expanding scaffolding formed from a plurality of wires including a plurality of spaces between the wires, the spaces configured to allow objects to pass through the scaffolding; and

wherein the plurality of wires cross each other at points and at least some of the wires are connected at the points and at least some of the wires are unconnected at the points.

2. The medical device of claim 1, wherein the distal end of the retrieval assembly is configured to be substantially open or substantially closed.

3. The medical device of claim 2, wherein the distal end of the retrieval assembly has a cross-sectional area generally orthogonal to the longitudinal axis.

4. The medical device of claim 2, further comprising a closure mechanism affixed to the retrieval assembly proximate the distal end of the retrieval assembly.

5. The medical device of claim 4, wherein the closure mechanism comprises an actuator extending proximally within a lumen of the inner elongate member and a material interwoven into the scaffolding of the retrieval assembly.

6. The medical device of claim 1, wherein the inner elongate member is slidably disposed within the outer elongate member.

7. The medical device of claim 1, wherein the retrieval assembly is configured to be selectively expanded or collapsed.

8. The medical device of claim 7, wherein the retrieval assembly is configured to be substantially collapsed when retracted within the outer elongate member.

9. The medical device of claim 7, wherein the retrieval previously presented assembly is configured to self-expand when extended beyond the lumen of the outer elongate member.

10. A medical device comprising:

a first elongate member extending along a longitudinal axis, the first elongate member having a proximal end, a distal end, and a lumen extending therebetween;

a second elongate member slidably disposed within the lumen of the first elongate member;

a retrieval assembly extending generally parallel to the longitudinal axis of the first elongate member and having a proximal end and a distal end, the retrieval assembly secured to a distal end region of the second elongate member adjacent the proximal end of the retrieval assembly; and

a closure mechanism affixed to the distal end of the retrieval assembly, the closure mechanism configured to selectively open and close the distal end of the retrieval assembly;

wherein the retrieval assembly includes a scaffolding comprising a plurality of wires arranged in a pattern configured to allow objects to pass through the scaffolding along a length of the scaffolding; and

wherein the plurality of wires cross at a plurality of points and at least some of the wires are connected at the points and at least some of the wires are unconnected at the points.

11. The medical device of claim 10, wherein the retrieval assembly is retractable within and extendable from the lumen of the first elongate member.

12. The medical device of claim 11, wherein the retrieval assembly is configured to be selectively expanded or collapsed.

13. The medical device of claim 12, wherein the retrieval assembly is configured to be substantially collapsed when retracted within the first elongate member.

14. The medical device of claim 10, wherein the closure mechanism comprises an actuator and a flexible member.

15. The medical device of claim 14, wherein the flexible member is interwoven with the plurality of wires adjacent the distal end of the retrieval device.