Atraumatic medical device

• US 20060058813A1
• Filed: 09/15/2004
• Published: 03/16/2006
• Est. Priority Date: 09/15/2004
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Bultman, Aaron J., Curtis, Juli L., Teague, James A., Abdulaziz, Mohamed Fazni
• Granted Patent: US 7,824,415 B2
• Time in Patent Office: Days
• US Class Current: 606/113
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• 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

Abstract

A medical device, and related method, for manipulating material, such as calculi, within a patient'"'"'s body includes a handle, a sheath, a retrieval basket, and a retainer coupled to the distal end of the retrieval basket. The retrieval basket includes a plurality of legs, each of which includes an intermediate portion located at the distal end of the retrieval basket. The retainer secures at least the intermediate portion of one of the plurality of legs to the intermediate portion of another of the plurality of legs.

Claims

1. A medical device, comprising:

a handle;

a sheath joined to the handle, the sheath comprising a lumen;

a retrieval basket comprising a proximal end, a distal end, and a plurality of legs, each of the plurality of legs comprising a first end, a second end, and an intermediate portion, wherein the first and second ends of the plurality of legs are located at the proximal end of the retrieval basket and the intermediate portion of each of the plurality of legs is located between the first and second ends of the leg, the intermediate portion being positioned at the distal end of the retrieval basket, the retrieval basket achieving a collapsed position when restrained in the lumen of the sheath and an expanded position when unrestrained by the lumen of the sheath; and

a retainer coupled to the distal end of the retrieval basket to secure at least the intermediate portion of one of the plurality of legs to the intermediate portion of another of the plurality of legs, wherein at least the intermediate portion of one of the plurality of legs crosses the intermediate portion of another of the plurality of legs.

2. The medical device of claim 1 wherein the retainer comprises at least two bands.

3. The medical device of claim 2 wherein the at least two bands comprise heat shrink material.

4. The medical device of claim 1 wherein the retainer is X-shaped.

5. The medical device of claim 1 wherein the retainer comprises a plurality of tubes, each of the plurality of tubes comprising a first end, a second end, and a hollow passageway extending from the first end to the second end.

6. The medical device of claim 5 wherein each of the plurality of tubes comprises an intermediate section and at least the intermediate section of one of the plurality of tubes intersects the intermediate section of another of the plurality of tubes.

7. The medical device of claim 6 wherein at least the hollow passageway of one of the plurality of tubes is in fluid communication with the hollow passageway of another of the plurality of tubes.

8. The medical device of claim 5 wherein the plurality of tubes comprise heat shrink material.

9. The medical device of claim 5 wherein the intermediate portion of at least one of the plurality of legs comprises a connecting surface.

10. The medical device of claim 9 wherein the connecting surface comprises at least one notch.

11. The medical device of claim 1 wherein the retainer comprises a knob.

12. The medical device of claim 11 wherein the knob is injection molded to the distal end of the retrieval basket.

13. The medical device of claim 11 wherein the knob is heat shrunk to the distal end of the retrieval basket.

14. The medical device of claim 11 wherein the knob comprises an adhesive.

15. The medical device of claim 1 wherein the retainer comprises a first member and a second member, the first member comprising a plurality of risers.

16. The medical device of claim 15 wherein the first member is coupled to the second member.

17. The medical device of claim 1 wherein the retainer comprises a lumen and a plurality of openings in fluid communication with the lumen.

18. The medical device of claim 16 wherein the retainer is arch-shaped.

19. The medical device of claim 16 wherein the retainer is cylindrical-shaped.

20. A method of retrieving a material from a body, comprising:

inserting a medical device into the body, the medical device comprising;

a handle;

a sheath joined to the handle, the sheath comprising a lumen;

a retrieval basket comprising a proximal end, a distal end, and a plurality of legs, each of the plurality of legs comprising a first end, a second end, and an intermediate portion, wherein the first and second ends of the plurality of legs are located at the proximal end of the retrieval basket and the intermediate portion of each of the plurality of legs is located between the first and second ends of the leg, the intermediate portion being positioned at the distal end of the retrieval basket, the retrieval basket achieving a collapsed position when restrained in the lumen of the sheath and an expanded position when unrestrained by the lumen of the sheath; and

a retainer coupled to the distal end of the retrieval basket to secure at least the intermediate portion of one of the plurality of legs to the intermediate portion of another of the plurality of legs, wherein at least the intermediate portion of one of the plurality of legs crosses the intermediate portion of another of the plurality of legs;

positioning the retrieval basket proximate to the material to be retrieved with the retrieval basket in the expanded position;

capturing the material with the retrieval basket; and

withdrawing the retrieval basket from the body to remove the captured material from the body.