Releasable basket and method of making thereof

• US 8,732,933 B2
• Filed: 12/15/2010
• Issued: 05/27/2014
• Est. Priority Date: 05/25/1999
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Que, Like, Teague, James A., Bates, James S., Ward, Tim, Gobron, Stphane
• Primary Examiner(s): Cozart, Jermie
• Assistant Examiner(s): Salone, Bayan
• Application Number:
  US12/969,174
• Publication Number:
  US 20110143903A1
• Time in Patent Office: 1,259 Days
• Field of Search: 294/28, 606/113, 606/114, 606/127, 606/159, 606/200
• US Class Current: 29/428
• 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 2017/2215 having an open distal end
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A medical retrieval device includes a basket formed of two or more loops. The basket may be used to retrieve material (e.g., a urinary stone) from a body. The basket opens and closes for end-encapsulation of a stone and is strengthened by support members that interconnect the basket loops. A captured stone may be released from the basket with the basket still in the body by opening the loops.

Claims

1. A method for manufacturing a retrieval assembly, comprising the steps of:

forming a first configuration comprising a substantially T-shape including three members, each member comprising a free end, one member positioned substantially perpendicular to the other two members;

folding the other two members of the first configuration to form a loop with an apex;

folding the substantially perpendicular member at the apex of the loop to form a first hemi-basket;

forming a second configuration comprising a substantially T-shape including three members, each member comprising a free end, one member positioned substantially perpendicular to the other two members;

folding the other two members of the second configuration to form a loop with an apex;

folding the substantially perpendicular member at the apex of the loop to form a second hemi-basket;

opposing the loop of the first hemi-basket to the loop of the second hemi-basket; and

securing the free ends of members of the first hemi-basket to the free ends of members of the second hemi-basket to form the retrieval assembly.

2. The method of claim 1, wherein the first hemi-basket includes a back stay.

3. The method of claim 2, wherein the second hemi-basket includes a back stay.

4. The method of claim 1, wherein forming the first configuration and forming the second configuration comprises removing each of the first and second configurations from a single sheet of material.

5. The method of claim 4, wherein removal of the first configuration and removal of the second configuration comprises stamping.

6. The method of claim 1, wherein forming the first and second configurations comprises molding.

7. The method of claim 1, wherein the first configuration and the second configuration comprise wire including a cross-section selected from the group consisting of round, oval, square, rectangular, and D-shape.

8. The method of claim 1, wherein the first and second configurations comprise wire including at least two portions of differing cross-sectional shape.

9. The method of claim 4, wherein removal of the first and second configurations comprises at least one of photo-etching and cutting.