Hybrid stone retrieval device

• US 6,350,266 B1
• Filed: 04/26/2000
• Issued: 02/26/2002
• Est. Priority Date: 02/02/1995
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: White, Curtis, Elliott, Brad, Bates, James S.
• Primary Examiner(s): Mancene, Gene
• Assistant Examiner(s): Priddy, Michael B.
• Application Number:
  US09/559,385
• Time in Patent Office: 671 Days
• Field of Search: 606/110, 606/113, 606/114, 606/127, 104/22
• US Class Current: 606/114
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes 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 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/22072 with an instrument channel, e.g. for replacing one instrument by the other in cannulas A61B17/3417
• 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

Baskets with multiple portions and multiple deployed configurations allow the capture and release of material within the body.

Claims

1. A medical instrument, comprising:

a proximal handle;

a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle;

a retrieval assembly comprising a plurality of legs, at least one of the legs comprising a proximal portion and a distal portion and a joint for connecting the proximal and distal portions, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, the retrieval assembly and sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensioned shape out of the lumen of the sheath.

2. The medical instrument of claim 1 wherein the joint comprises a loop.

3. The medical instrument of claim 1 wherein the joint comprises a hook.

4. The medical instrument of claim 1 wherein the joint comprises a crimp.

5. A medical instrument, comprising:

a proximal handle;

a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle; and

a retrieval assembly comprising a proximal portion and distal portion, the proximal portion comprising a first material, the distal portion comprising a second material, wherein the second material is more flexible than the first material, the retrieval assembly and the sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensioned shape out of the lumen of the sheath.

6. The medical instrument of claim 5 wherein the sheath is moveable.

7. The medical instrument of claim 5 further comprising an elongated member operably attached to a proximal end of the retrieval assembly for moving the retrieval assembly relative to the sheath.

8. The medical instrument of claim 5 wherein the retrieval assembly further comprises a plurality of legs.

9. The medical instrument of claim 8 wherein the retrieval assembly comprises four legs.

10. The medical instrument of claim 8 wherein the proximal portion of the leg comprises a first material and the distal portion of the leg comprises a second material.

11. The medical instrument of claim 10 wherein the second material is more flexible than the first material.

12. The medical instrument of claim 8 wherein a leg further comprises a proximal portion and a distal portion.

13. The medical instrument of claim 12 wherein the leg comprises ajoint for connecting the proximal portion and the distal portion of the leg.

14. The medical instrument of claim 13 wherein the joint comprises a loop.

15. The medical instrument of claim 13 wherein the joint comprises a hook.

16. The medical instrument of claim 13 wherein the joint comprises a crimp.

17. The medical instrument of claim 12 wherein the proximal portion of the retrieval assembly comprises legs wherein the proximal leg portion is straight and the distal leg portion is bulbous.

18. The medical instrument of claim 12 wherein the proximal leg portion is bulbous and the distal leg portion is bulbous.

19. A medical instrument, comprising:

a proximal handle;

a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle; and

a retrieval assembly comprising a plurality of legs, at least one of the legs comprising a proximal portion and a distal portion, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, the retrieval assembly and sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensioned shape out of the lumen of the sheath.

20. The medical instrument of claim 19 wherein the second material is more flexible than the first material.

21. A medical instrument comprising:

a proximal handle;

a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle; and

a retrieval assembly comprising a proximal portion and a distal portion and a plurality of legs, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, wherein one of the legs comprises a proximal portion and a distal portion, and the proximal leg portion is straight and the distal leg portion is bulbous, the retrieval assembly and the sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensional shape out of the lumen of the sheath.

22. A medical instrument comprising:

a proximal handle;

a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle; and

a retrieval assembly comprising a proximal portion and a distal portion and a plurality of legs, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, wherein one of the legs comprises a proximal portion and a distal portion, and the proximal leg portion is bulbous and the distal leg portion is bulbous, the retrieval assembly and the sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensional shape out of the lumen of the sheath.

23. A method for retrieving material in a body comprising the steps of:

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

a proximal handle;

a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle;

a retrieval assembly comprising a proximal portion and distal portion, the proximal portion comprising a first material, the distal portion comprising a second material, wherein the second material is more flexible than the first material, the retrieval assembly and the sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensioned shape out of the lumen of the sheath;

capturing material in the retrieval assembly; and

,

withdrawing the retrieval assembly with the captured material from the body.

24. A method for retrieving material in a body comprising the steps of:

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

a proximal handle;

a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle; and

a retrieval assembly comprising a plurality of legs, at least one of the legs comprising a proximal portion and a distal portion and a joint for connecting the proximal and distal portions, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, the retrieval assembly and sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensioned shape out of the lumen of the sheath;

capturing material in the retrieval assembly; and

,

withdrawing the retrieval assembly with the captured material from the body.

25. A method for retrieving material in a body comprising the steps of:

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

a proximal handle;

a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle; and

a retrieval assembly comprising a plurality of legs, at least one of the legs comprising a proximal portion and a distal portion, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, the retrieval assembly and sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensioned shape out of the lumen of the sheath;

capturing material in the retrieval assembly; and

,

withdrawing the retrieval assembly with the captured material from the body.