Releasable basket

• US 20060009786A1
• Filed: 09/09/2005
• Published: 01/12/2006
• Est. Priority Date: 10/01/1997
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Bates, James S., Teague, James A.
• Granted Patent: US 7,678,118 B2
• Time in Patent Office: Days
• US Class Current: 606/113
• 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 2017/2215 having an open distal end

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

1-31. -31. (canceled)

32. A medical device, comprising:

a proximal handle;

a sheath extending distally from the handle and having a lumen extending therethrough from a distal end of the sheath to a proximal end of the sheath; and

at least two opposing loops having a collapsed position in which the loops are collapsed within the lumen of the sheath and another position in which the loops extend from the distal end of the sheath and out of the lumen, the loops being joined at their proximal ends and unattached to each other at their distal ends, the loops being moveable between an open position and a closed position with the loops being closer together at their distal ends when in the closed position than when in the open position to allow capture and release of material, at least one of the loops comprising a cutting surface.

33. The device of claim 32, wherein the cutting surface comprises an energizeable surface.

34. The device of claim 33, wherein the energizeable surface is energized by RF energy.

35. The device of claim 32, wherein the cutting surface comprises at least part of the distal end of the loop.

36. The device of claim 32, wherein the sheath moves relative to the loops.

37. The device of claim 32, further comprising an elongated member extending from the handle through the lumen of the sheath, and joined to the loops.

38. The device of claim 32, wherein at least a portion of the loops is coated with an anti-slip substance.

39. The device of claim 32, wherein at least a portion of the loops is roughened.

40. The device of claim 32, further comprising one or more support members disposed between the loops.

41. The device of claim 32, further comprising an elongated member disposed within the lumen of the sheath and at least one wire operably attached to at least one loop and to the elongated member, movement of the loops between the closed and open positions being achieved through movement of the elongated member.

42. A method for retrieving biological materials from a body, comprising:

inserting a medical retrieval device into a body, the device comprising a proximal handle, a sheath extending distally from the handle and having a lumen extending therethrough from a distal end of the sheath to a proximal end of the sheath, and at least two opposing loops having a collapsed position in which the loops are collapsed within the lumen of the sheath and another position in which the loops extend from the distal end of the sheath and out of the lumen, the loops being joined at their proximal ends and unattached to each other at their distal ends, the loops being moveable between an open position and a closed position with the loops being closer together at their distal ends when in the closed position than when in the open position to allow capture and release of material, at least one of the loops comprising a cutting surface;

placing the loops in the position in which they extend from the distal end of the sheath and out of the lumen of the sheath;

capturing a biological material within the basket; and

withdrawing the device from the body to remove the biological material from the body.

43. The method of claim 42, wherein the capturing step further comprises breaking the biological material into two or more pieces within the loops.

44. The method of claim 42, wherein the step of capturing the biological material comprises capturing a calculus or a stone.

45. The method of claim 42, wherein the step of capturing the biological material comprises capturing one of a kidney stone, a ureteral stone, a urinary bladder stone, a gall bladder stone, and a stone within the biliary tree.

46. The method of claim 42, further including energizing a portion of the cutting surface with RF energy.

47. The method of claim 42, wherein at least one of the steps of placing the loops and capturing a biological material includes moving the sheath relative to the loops.

48. The method of claim 42, wherein at least one of the steps of placing the loops and capturing a biological material includes moving an elongated member disposed within the lumen of the sheath, the medical retrieval device further including at least one wire operably attached to at least one loop and to the elongated member.

49. The method of claim 42, wherein the medical retrieval device further includes one or more support members disposed between the loops.

50. The method of claim 42, wherein the step of capturing the biological material comprises a polypectomy.

51. The method of claim 42, wherein the step of capturing the biological material comprises a biopsy procedure.

52. The method of claim 42, further including cutting the biological material from the body.

53. The method of claim 52, wherein the biological material comprises a polyp and the cutting step includes cutting a polyp stalk.