Claims
- 1. A medical retrieval device, comprising:a proximal handle; a sheath including a proximal portion, a distal end, and a lumen, the sheath extending distally from the handle; and a basket, the basket and the sheath moveable relative to each other to achieve a retracted position in which the basket is collapsed within the lumen of the sheath, and an extended position in which the basket extends from the distal end of the sheath, the basket comprising at least three wires, the wires joined at a distal end of the basket for capturing material when the basket is in the extended position, and for holding material when the basket is at least partially collapsed in the sheath, at least one of the wires comprising an inner surface and an outer surface, wherein at least a portion of said inner surface is flat and at least a portion of said outer surface is curved, and wherein the basket is positioned at the distal end of the device for capturing material in a body.
- 2. The device of claim 1 wherein the inner surface comprises a flat surface such that a cross-section of said wire comprises a B-shape.
- 3. The device of claim 1 wherein the outer surface comprises at least one curved surface.
- 4. The device of claim 1 wherein the inner surface comprises a flat surface such that a cross section of said wire comprises a D-shape.
- 5. The device of claim 1 wherein the inner surface comprises at least one tooth.
- 6. The device of claim 1 wherein the inner surface comprises a surface that is rougher than the outer surface.
- 7. The device of claim 1 wherein the inner surface is rough.
- 8. The device of claim 7 wherein the rough inner surface comprises a serrated surface.
- 9. The device of claim 7 wherein the inner surface comprises a plurality of teeth.
- 10. The device of claim 7 wherein the rough inner surface comprises an etched surface.
- 11. The device of claim 1 wherein the outer surface comprises more than one radius.
- 12. The medical retrieval device of claim 1 wherein the flat inner surface has at least a portion adapted to contact material, the portion of the inner surface being a rough surface.
- 13. The device of claim 2 wherein the inner surface comprises a serrated surface.
- 14. The device of claim 4 wherein the inner surface comprises a toothed surface.
- 15. The device of claim 4 wherein the inner surface comprises an etched surface.
- 16. The device of claim 3 wherein the curved surface comprises more than one radius.
- 17. The device of claim 4 wherein the radius of the outer surface is greater than or equal to 0.012 inches and less than or equal to 0.014 inches.
- 18. The device of claim 4 wherein the flat surface of the cross-section is 0.004±0.0005 inches in length.
- 19. The device of claim 4 wherein the radius of the curved surface is greater than or equal to 0.012 inches and less than or equal to 0.014 inches and the flat surface of the cross-section is 0.004 inches±0.0005 inches in length.
- 20. A method for retrieving material from a body, comprising:inserting an extractor into a body, the extractor comprising a proximal handle; a sheath including a proximal portion, a distal end, and a lumen, the sheath extending distally from the handle, and a basket, the basket and the sheath moveable relative to each other to achieve a retracted position in which the basket is collapsed within the lumen of the sheath, and an extended position in which the basket extends from the distal end of the sheath, the basket comprising at least three wires, the wires joined at a distal end of the basket for capturing material when the basket is in the extended position, and for holding material when the basket is at least partially collapsed in the sheath, at least one of the wires comprising an inner surface and an outer surface wherein at least a portion of said inner surface is flat and at least a portion of said outer surface is curved, and wherein the basket is positioned at the distal end of the device for capturing material in a body, capturing the material with the basket; and withdrawing the extractor from the body to remove the captured material from the body.
- 21. The method of claim 20 wherein the step of capturing the material comprises capturing a calculus.
- 22. The method of claim 21 wherein the step of capturing the calculus comprises capturing a kidney stone.
- 23. The method of claim 21 wherein the step of capturing the calculus comprises capturing a ureteral stone.
- 24. The method of claim 21 wherein the step of capturing the calculus comprises capturing a bladder stone.
- 25. The method of claim 21 wherein the step of capturing the calculus comprises capturing a stone in the biliary tree.
- 26. The method of claim 20 wherein the capturing step further comprises breaking the material into two or more pieces with the basket.
- 27. A medical retrieval device, comprising:a proximal handle; a sheath including a proximal portion, a distal end, and a lumen, the sheath extending distally from the handle; and a basket, the basket and the sheath moveable relative to each other to achieve a retracted position in which the basket is collapsed within the lumen of the sheath, and an extended position in which the basket extends from the distal end of the sheath, the basket comprising at least three wires, the wires joined at a distal end of the basket for capturing material when the basket is in the extended position, and for holding material when the basket is at least partially collapsed in the sheath, at least one of the wires comprising an inner surface and an outer surface, wherein said inner surface and said outer surface are curved and a cross-section of said wire comprises a crescent shape.
CROSS REFERENCE TO RELATED APPLICATIONS
This is based on, and claims priority to, provisional U.S. patent application ser. No. 60/060,830 which was filed on Oct. 1, 1997. This also is based on, and claims priority to, two other provisional U.S. patent applications filed on that date, namely, ser. No. 60/060,819 filed on Oct. 1, 1997 and ser. No. 60/060,821 filed on Oct. 1, 1997.
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Provisional Applications (3)
|
Number |
Date |
Country |
|
60/060830 |
Oct 1997 |
US |
|
60/060819 |
Oct 1997 |
US |
|
60/060821 |
Oct 1997 |
US |