US6099534A — Releasable basket

Claim 1

Independent Claim 157 words

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 a base 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 having a different length from the base to its distal end than at least one other of the loops.

Claim 2

Dependent Claim 157 words

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 a base 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 having a different length from the base to its distal end than at least one other of the loops.

Claim 3

Dependent Claim 13 words

The device of claim 1 wherein said sheath moves relative to the loops.

Claim 4

Dependent Claim 27 words

The device of claim 1 further comprising at least one elongated member extending from the handle through the lumen of the sheath, and joined to the loops.

Claim 5

Dependent Claim 18 words

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

Claim 6

Dependent Claim 25 words

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 25 words

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

Claim 8

Dependent Claim 14 words

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

Claim 9

Dependent Claim 14 words

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

Claim 10

Dependent Claim 14 words

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

Claim 11

Dependent Claim 11 words

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

Claim 12

Dependent Claim 17 words

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

Claim 13

Dependent Claim 16 words

The device of claim 1 wherein the loops are formed from a single piece of material.

Claim 14

Dependent Claim 11 words

The device of claim 1 wherein the loops comprise stainless steel.

Claim 15

Dependent Claim 13 words

The device of claim 1 wherein the loops comprise a shape memory material.

Claim 16

Dependent Claim 20 words

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

Claim 17

Dependent Claim 19 words

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

Claim 18

Dependent Claim 17 words

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

Claim 19

Independent Claim 222 words

A method for retrieving biological material 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 a base 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, release, and retrieval of material, at least one of the loops having a different length from the base to its distal end than at least one other of the loops; 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 the biological material with the loops; and withdrawing the device from the body to remove the biological material from the body.

Claim 20

Independent Claim 222 words

A method for retrieving biological material 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 a base 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, release, and retrieval of material, at least one of the loops having a different length from the base to its distal end than at least one other of the loops; 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 the biological material with the loops; and withdrawing the device from the body to remove the biological material from the body.

Claim 21

Dependent Claim 24 words

The method of claim 18 wherein the capturing step further comprises breaking the biological material into two or more pieces within the opposing loops.

Claim 22

Dependent Claim 20 words

The method of claim 18 wherein the step of capturing the biological material comprises capturing a calculus or a stone.

Claim 23

Dependent Claim 18 words

The method of claim 20 wherein the step of capturing the biological material comprises capturing a kidney stone.

Claim 24

Dependent Claim 18 words

The method of claim 20 wherein the step of capturing the biological material comprises capturing a ureteral stone.

Claim 25

Dependent Claim 19 words

The method of claim 20 wherein the step of capturing the biological material comprises capturing a urinary bladder stone.

Claim 26

Dependent Claim 19 words

The method of claim 20 wherein the step of capturing the biological material comprises capturing a gall bladder stone.

Claim 27

Dependent Claim 21 words

The method of claim 20 wherein the step of capturing the biological material comprises capturing a stone within the biliary tree.

Claim 28

Dependent Claim 16 words

The method of claim 18 wherein the step of capturing the biological material comprises a polypectomy.

Claim 29

Dependent Claim 17 words

The method of claim 18 wherein the step of capturing the biological material comprises a biopsy procedure.

Claim 30

Independent Claim 88 words

A method for manufacturing a distal end of a medical retrieval device, 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 to form opposing loops; and securing together the two ends of the template to form the distal end of the medical retrieval device.

Claim 31

Independent Claim 88 words

A method for manufacturing a distal end of a medical retrieval device, 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 to form opposing loops; and securing together the two ends of the template to form the distal end of the medical retrieval device.

Claim 32

Independent Claim 68 words

A method for manufacturing a distal end of a medical retrieval device, 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 opposing loops; and securing together the superimposed ends of the template to form the distal end of the medical retrieval device.

Claim 33

Independent Claim 68 words

A method for manufacturing a distal end of a medical retrieval device, 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 opposing loops; and securing together the superimposed ends of the template to form the distal end of the medical retrieval device.

Claim 34

Dependent Claim 19 words

The method of claim 29 further comprising applying an anti-slip material to at least one surface of the template.

Claim 35

Dependent Claim 15 words

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

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2003-08-08	2004-02-07	2004-08-08	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2007-08-08	2008-02-07	2008-08-08	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2011-08-08	2012-02-07	2012-08-08	$7700.00	Window Closed / Lapsed

Releasable basket

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