US20080208230A1 — Expandable rotating device and method for tissue …

Claim 1

Independent Claim 113 words

1 . A device for removing material from a body, comprising: a drive shaft comprising a proximal section, a distal section and a longitudinal shaft axis therebetween; a motor coupled to the proximal section of the drive shaft; and at least one tissue disrupting member comprising a proximal section and a distal section and having a collapsed configuration and a deployed configuration; wherein the proximal section of the tissue disrupting member is coupled to the distal section of the drive shaft at a proximal coupling zone, and wherein the collapsed configuration of the tissue disrupting member exerts greater bending stress on the proximal end of the tissue disrupting member than the deployed configuration.

Claim 2

Dependent Claim 113 words

1 . A device for removing material from a body, comprising: a drive shaft comprising a proximal section, a distal section and a longitudinal shaft axis therebetween; a motor coupled to the proximal section of the drive shaft; and at least one tissue disrupting member comprising a proximal section and a distal section and having a collapsed configuration and a deployed configuration; wherein the proximal section of the tissue disrupting member is coupled to the distal section of the drive shaft at a proximal coupling zone, and wherein the collapsed configuration of the tissue disrupting member exerts greater bending stress on the proximal end of the tissue disrupting member than the deployed configuration.

Claim 3

Dependent Claim 19 words

2 . The device of claim 1 , wherein the tissue disrupting member is preshaped to its deployed configuration.

Claim 4

Dependent Claim 26 words

3 . The device of claim 1 , wherein the proximal section of the disrupting member is integral with the distal section of the drive shaft.

Claim 5

Dependent Claim 30 words

4 . The device of claim 1 , wherein the deployed configuration of at least one tissue disrupting member comprises a bend that is distal to the proximal coupling zone.

Claim 6

Dependent Claim 22 words

5 . The device of claim 4 , wherein the bend is at least about 1 mm distal to the coupling zone.

Claim 7

Dependent Claim 22 words

6 . The device of claim 5 , wherein the bend is at least about 1.5 mm distal to the coupling zone.

Claim 8

Dependent Claim 22 words

7 . The device of claim 6 , wherein the bend is at least about 2 mm distal to the coupling zone.

Claim 9

Dependent Claim 47 words

8 . The device of claim 4 , wherein the device comprises at least two tissue disrupting members and at least one slot between at least two tissue disrupting members, and wherein the at least one slot comprises a proximal slot end and a distal slot end.

Claim 10

Dependent Claim 36 words

9 . The device of claim 8 , wherein the proximal slot end of at least one slot is longitudinally located between the proximal coupling zone and the bend of at least one tissue disrupting member.

Claim 11

Dependent Claim 32 words

10 . The device of claim 9 , wherein the distal slot end of at least one slot is longitudinally located distal to the bend of at least one tissue disrupting member.

Claim 12

Dependent Claim 22 words

11 . The device of claim 4 , wherein the tissue disrupting member proximal to the bend comprises a generally straight configuration.

Claim 13

Dependent Claim 18 words

12 . The device of claim 1 , wherein the tissue disrupting member is an elongate disrupting member.

Claim 14

Dependent Claim 35 words

13 . The device of claim 12 , wherein the distal section of the elongate tissue disrupting member is coupled to a slide member that is slidably located in a lumen of the drive shaft.

Claim 15

Dependent Claim 14 words

14 . The device of claim 1 , further comprising a helical transport structure.

Claim 16

Dependent Claim 21 words

15 . The device of claim 14 , wherein the helical structure is integral with a surface of the drive shaft.

Claim 17

Dependent Claim 19 words

16 . The device of claim 14 , wherein the helical structure is independently movable from the drive shaft.

Claim 18

Dependent Claim 52 words

17 . The device of claim 1 , further comprising a housing with a motor cavity, a drive shaft aperture, a drive shaft lumen between the motor cavity and the drive shaft aperture, a tubing connector and a lumen between the drive shaft lumen and the tubing connector, and a motor controller.

Claim 19

Dependent Claim 27 words

18 . The device of claim 17 , wherein the motor controller is configured to permit user-controlled movement of the drive shaft in two or more directions.

Claim 20

Dependent Claim 28 words

19 . The device of claim 13 , further comprising a slide controller configured to permit user-controlled movement of the slide member with respect to the drive shaft.

Claim 21

Dependent Claim 24 words

20 . The device of claim 1 , wherein the distal end of at least one tissue disrupting member comprises a free distal end.

Claim 22

Dependent Claim 29 words

21 . The device of claim 4 , wherein at least one tissue disrupting member slidably resides in a distal lumen of the distal section of the drive shaft.

Claim 23

Dependent Claim 23 words

22 . The device of claim 21 , wherein at least one tissue disrupting member comprises an elongate wire, polymer or fiber structure.

Claim 24

Dependent Claim 19 words

23 . The device of claim 20 , wherein at least one tissue disrupting member comprises a plate member.

Claim 25

Dependent Claim 17 words

24 . The device of claim 23 , wherein the plate member is a non-planar plate member.

Claim 26

Dependent Claim 20 words

25 . The device of claim 23 , wherein the proximal end of the plate member comprises a flange configuration.

Claim 27

Dependent Claim 49 words

26 . The device of claim 1 , wherein an outermost portion of the tissue disrupting member is located about 1 mm to about 5 mm from the longitudinal axis of the drive shaft in the collapsed configuration and about 2 mm to 13 mm in the deployed position.

Claim 28

Dependent Claim 35 words

27 . The device of claim 1 , wherein at least one tissue disrupting member comprises a material selected from a group consisting of nickel-titanium alloy, stainless steel, cobalt-chromium alloy, nickel-cobalt-chromium-molybdenum alloy, and titanium-aluminum-vanadium alloy.

Claim 29

Dependent Claim 22 words

28 . The device of claim 1 , further comprising from about three tissue disrupting members to about six tissue disrupting members.

Claim 30

Dependent Claim 136 words

29 . A method of removing tissue, comprising: providing a tissue disrupting device comprising a drive shaft and a plurality of tissue disrupting members coupled to the drive shaft at a coupling zone; exerting a greater stress on the plurality of non-linear tissue disrupting members at a distal stress zone that is distal to the coupling zone and a lesser stress at a proximal stress zone located between the coupling zone and the distal stress zone to restrain the tissue disrupting device; inserting the restrained tissue disrupting device into a body; positioning the restrained tissue disrupting device about a target area in the body; reducing the greater stress at the distal stress zone of the plurality of non-linear tissue disrupting members; and actuating the plurality of tissue disrupting members to disrupt tissue at the target area.

Claim 31

Dependent Claim 136 words

29 . A method of removing tissue, comprising: providing a tissue disrupting device comprising a drive shaft and a plurality of tissue disrupting members coupled to the drive shaft at a coupling zone; exerting a greater stress on the plurality of non-linear tissue disrupting members at a distal stress zone that is distal to the coupling zone and a lesser stress at a proximal stress zone located between the coupling zone and the distal stress zone to restrain the tissue disrupting device; inserting the restrained tissue disrupting device into a body; positioning the restrained tissue disrupting device about a target area in the body; reducing the greater stress at the distal stress zone of the plurality of non-linear tissue disrupting members; and actuating the plurality of tissue disrupting members to disrupt tissue at the target area.

Claim 32

Dependent Claim 34 words

30 . The method of claim 29 , wherein actuating the plurality of tissue disrupting member comprises rotating the plurality of disrupting members at a speed of about 5,000 rpm to about 100,000 rpm.

Claim 33

Dependent Claim 34 words

31 . The method of claim 29 , wherein actuating the plurality of tissue disrupting member comprises rotating the plurality of disrupting members at a speed of about 3,000 rpm to about 20,000 rpm.

Claim 34

Dependent Claim 16 words

32 . The method of claim 29 , further comprising emulsifying tissue at the target area.

Claim 35

Dependent Claim 22 words

33 . The method of claim 29 , further comprising rotating an auger to transport disrupted tissue away from the target area.

Claim 36

Dependent Claim 21 words

34 . The method of claim 33 , wherein the plurality of tissue disrupting members and the auger are rotated independently.

Claim 37

Dependent Claim 25 words

35 . The method of claim 29 , further comprising: applying suction to the target area to transport disrupted tissue away from the target area.

Claim 38

Dependent Claim 32 words

36 . The method of claim 29 , further comprising: adjusting the greater stress at the distal stress zone to modify at least one dimension of the plurality of tissue disrupting members.

Claim 39

Dependent Claim 85 words

37 . The method of claim 29 , further comprising: adjusting the greater stress at the distal stress zone to reduce at least one dimension of the plurality of tissue disrupting members; repositioning the tissue disrupting device so that the plurality of tissue disrupting members to a second target area; readjusting the greater stress at the distal stress zone to increase at least one dimension of the plurality of tissue disrupting members; and rotating the strip portion to disrupt tissue at the second target area.

Claim 40

Dependent Claim 116 words

38 . A method of manufacturing a disrupting device, comprising: providing a tubular body comprising a proximal end, a distal end, and a midsection therebetween; creating a plurality of struts with disrupting edges in the midsection of the tubular body by forming a plurality of slots between the proximal and distal ends of the tubular body; shaping the midsection of the tubular body in a radially outward direction without straining the tubular body by more than 8%; heat annealing the tubular body to reduce the strain; reshaping the heat annealed midsection in a radially outward direction without straining the tubular body by more than 8%; and heat annealing the reshaped tubular body to reduce the strain.

Claim 41

Dependent Claim 116 words

38 . A method of manufacturing a disrupting device, comprising: providing a tubular body comprising a proximal end, a distal end, and a midsection therebetween; creating a plurality of struts with disrupting edges in the midsection of the tubular body by forming a plurality of slots between the proximal and distal ends of the tubular body; shaping the midsection of the tubular body in a radially outward direction without straining the tubular body by more than 8%; heat annealing the tubular body to reduce the strain; reshaping the heat annealed midsection in a radially outward direction without straining the tubular body by more than 8%; and heat annealing the reshaped tubular body to reduce the strain.

Claim 42

Dependent Claim 21 words

39 . The method of claim 38 , further comprising coupling the tubular body to a motor with a rotatable shaft.

Expandable rotating device and method for tissue aspiration

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