US20030135233A1 — Releasable basket

Claim 1

Independent Claim 171 words

1 . A medical device for retrieving material from a body, 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from a distal end of the sheath to a proximal end of the sheath; and a basket moveable relative to the sheath between a withdrawn position in which the basket is collapsed within the lumen of the sheath, and an extended position in which the basket extends from the distal end of the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 and is disposed outside of the lumen, and the basket having a base and a distal portion when in the extended position and comprising at least two loops which are joined at the base and which are unattached to each other at the distal portion of the basket, the loops being moveable when the basket is in the extended position between an open position and a closed position with the loops being closer together at the distal portion when in the closed position than when in the open position.

Claim 2

Dependent Claim 171 words

1 . A medical device for retrieving material from a body, 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from a distal end of the sheath to a proximal end of the sheath; and a basket moveable relative to the sheath between a withdrawn position in which the basket is collapsed within the lumen of the sheath, and an extended position in which the basket extends from the distal end of the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 and is disposed outside of the lumen, and the basket having a base and a distal portion when in the extended position and comprising at least two loops which are joined at the base and which are unattached to each other at the distal portion of the basket, the loops being moveable when the basket is in the extended position between an open position and a closed position with the loops being closer together at the distal portion when in the closed position than when in the open position.

Claim 3

Dependent Claim 28 words

2 . The device of claim 1 wherein the loops assume the open position automatically when the basket is moved relative to the sheath into the extended position.

Claim 4

Dependent Claim 40 words

3 . The device of claim 1 further comprising at least one elongate member extending within the lumen from the handle to at least one of the loops for use in moving the loops between the open and closed positions.

Claim 5

Dependent Claim 20 words

4 . The device of claim 1 wherein each of the loops comprise an inner surface and an outer surface.

Claim 6

Dependent Claim 27 words

5 . The device of claim 4 wherein at least a portion of the inner surface of at least one of the loops comprises a concave surface.

Claim 7

Dependent Claim 30 words

6 . The device of claim 4 wherein at least a portion of the inner surface of at least one of the two or more loops comprises a roughened surface.

Claim 8

Dependent Claim 16 words

7 . The device of claim 6 wherein the roughened inner surface comprises a serrated surface.

Claim 9

Dependent Claim 16 words

8 . The device of claim 6 wherein the roughened inner surface comprises an etched surface.

Claim 10

Dependent Claim 16 words

9 . The device of claim 6 wherein the roughened inner surface comprises a toothed surface.

Claim 11

Dependent Claim 13 words

10 . The device of claim 1 wherein the loops comprise flat wire.

Claim 12

Dependent Claim 19 words

11 . The device of claim 1 further comprising a mesh or membrane disposed within each of the loops.

Claim 13

Dependent Claim 18 words

12 . The device of claim 1 wherein the basket is formed from a single piece of material.

Claim 14

Dependent Claim 13 words

13 . The device of claim 1 wherein the basket comprises stainless steel.

Claim 15

Dependent Claim 15 words

14 . The device of claim 1 wherein the basket comprises a shape memory material.

Claim 16

Dependent Claim 25 words

15 . The device of claim 2 further comprising one or more support members disposed between the loops to provide structural support to the basket.

Claim 17

Dependent Claim 20 words

16 . The device of claim 1 wherein mechanisms for fragmenting or moving the material are deployable within the lumen.

Claim 18

Dependent Claim 18 words

17 . The device of claim 1 wherein the loops are energizeable to delivery energy to excise tissue.

Claim 19

Dependent Claim 247 words

18 . 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 a basket moveable relative to the sheath between a withdrawn 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 and is disposed outside of the lumen, and the basket having a base and a distal portion when in the extended position and comprising at least two loops which are joined at the base and which are unattached to each other at the distal portion of the basket, the loops being moveable when the basket is in the extended position between an open position and a closed position with the loops being closer together at the distal portion when in the closed position than when in the open position; extending the basket from the sheath and moving the basket loops from a closed position to an open position; capturing the biological material within the basket; retracting the loops into the sheath wherein the unattached ends of the loops are juxtaposed thereby moving the basket to a substantially closed position; and withdrawing the device from the body to remove the biological material from the body.

Claim 20

Dependent Claim 247 words

18 . 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 a basket moveable relative to the sheath between a withdrawn 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 and is disposed outside of the lumen, and the basket having a base and a distal portion when in the extended position and comprising at least two loops which are joined at the base and which are unattached to each other at the distal portion of the basket, the loops being moveable when the basket is in the extended position between an open position and a closed position with the loops being closer together at the distal portion when in the closed position than when in the open position; extending the basket from the sheath and moving the basket loops from a closed position to an open position; capturing the biological material within the basket; retracting the loops into the sheath wherein the unattached ends of the loops are juxtaposed thereby moving the basket to a substantially closed position; and withdrawing the device from the body to remove the biological material from the body.

Claim 21

Dependent Claim 25 words

19 . The method of claim 19 wherein the capturing step further comprises breaking the biological material into two or more pieces within the basket.

Claim 22

Dependent Claim 22 words

20 . The method of claim 19 wherein the step of capturing the biological material comprises capturing a calculus or a stone.

Claim 23

Dependent Claim 20 words

21 . The method of claim 21 wherein the step of capturing the biological material comprises capturing a kidney stone.

Claim 24

Dependent Claim 20 words

22 . The method of claim 21 wherein the step of capturing the biological material comprises capturing a ureteral stone.

Claim 25

Dependent Claim 21 words

23 . The method of claim 21 wherein the step of capturing the biological material comprises capturing a urinary bladder stone.

Claim 26

Dependent Claim 21 words

24 . The method of claim 21 wherein the step of capturing the biological material comprises capturing a gall bladder stone.

Claim 27

Dependent Claim 23 words

25 . The method of claim 21 wherein the step of capturing the biological material comprises capturing a stone within the biliary tree.

Claim 28

Dependent Claim 18 words

26 . The method of claim 19 wherein the step of capturing the biological material comprises a polypectomy.

Claim 29

Dependent Claim 19 words

27 . The method of claim 19 wherein the step of capturing the biological material comprises a biopsy procedure.

Claim 30

Dependent Claim 72 words

28 . A method for manufacturing a medical retrieval basket, comprising: removing a flat, substantially oval template from a single piece of construction material, the template being symmetrical and having a first end and a second end, the first end and the second end being oppositely disposed; folding the template such that the first and second ends of the template are brought together; and securing together the two ends of the template.

Claim 31

Dependent Claim 72 words

28 . A method for manufacturing a medical retrieval basket, comprising: removing a flat, substantially oval template from a single piece of construction material, the template being symmetrical and having a first end and a second end, the first end and the second end being oppositely disposed; folding the template such that the first and second ends of the template are brought together; and securing together the two ends of the template.

Claim 32

Dependent Claim 56 words

29 . A method for manufacturing a medical retrieval basket, comprising: removing a flat template from a single piece of construction material, the template being symmetrical and having two ends; folding the template such that the two ends of the template are superimposed to form basket loops; and securing together the superimposed ends of the template.

Claim 33

Dependent Claim 56 words

29 . A method for manufacturing a medical retrieval basket, comprising: removing a flat template from a single piece of construction material, the template being symmetrical and having two ends; folding the template such that the two ends of the template are superimposed to form basket loops; and securing together the superimposed ends of the template.

Claim 34

Dependent Claim 21 words

30 . The method of claim 30 further comprising applying an anti-slip material to at least one surface of the template.

Claim 35

Dependent Claim 17 words

31 . The method of claim 30 further comprising roughening at least one surface of the template.

Releasable basket

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