US20040087988A1 — Rotational atherectomy system with stationary cut…

Claim 1

Independent Claim 134 words

1 . A percutaneous device for removing material from a body lumen, comprising: an elongate, flexible tube having a distal end and a proximal end and defining a passageway therethrough; a material removal tip on the distal end of the tube, including an outer housing rotationally fixed with respect to the tube and a member permitted to rotate within the outer housing, the outer housing having a lumen extending therethrough and an open distal mouth; the rotatable member having proximal and distal ends, a central body, and a plurality of circumferentially spaced flanges extending radially outward from the body; and a shearing member on the housing axially adjacent to the flanges and having a shearing edge to shear material received into the open mouth of the housing between the shearing member and the flanges.

Claim 2

Dependent Claim 134 words

1 . A percutaneous device for removing material from a body lumen, comprising: an elongate, flexible tube having a distal end and a proximal end and defining a passageway therethrough; a material removal tip on the distal end of the tube, including an outer housing rotationally fixed with respect to the tube and a member permitted to rotate within the outer housing, the outer housing having a lumen extending therethrough and an open distal mouth; the rotatable member having proximal and distal ends, a central body, and a plurality of circumferentially spaced flanges extending radially outward from the body; and a shearing member on the housing axially adjacent to the flanges and having a shearing edge to shear material received into the open mouth of the housing between the shearing member and the flanges.

Claim 3

Dependent Claim 22 words

2 . The device of claim 1 further including a screw thread on the body formed distally with respect to the flanges.

Claim 4

Dependent Claim 21 words

3 . The device of claim 1 , wherein the shearing member extends radially from a wall of the housing lumen.

Claim 5

Dependent Claim 22 words

4 . The device of claim 3 further comprising shear planes of said shearing member precluding thrombus build-up within said housing lumen.

Claim 6

Dependent Claim 130 words

5 . A rotational medical device comprising: an elongate flexible tubular body having a proximal end, a distal end and an elongate central lumen; a cutter housing rotationally fixed to said distal end of said tubular body and a cutter positioned within said cutter housing, said cutter being capable of rotation within said cutter housing; said cutter housing comprising a lumen and an open distal end; said cutter comprising proximal and distal ends, a central body and a plurality of flanges extending radially outward from said central body; and a stationary member positioned on said cutter housing axially adjacent to said flanges and comprising a shearing edge to shear material between said stationary member and said flanges when material is received into said open distal end of said cutter housing.

Claim 7

Dependent Claim 130 words

5 . A rotational medical device comprising: an elongate flexible tubular body having a proximal end, a distal end and an elongate central lumen; a cutter housing rotationally fixed to said distal end of said tubular body and a cutter positioned within said cutter housing, said cutter being capable of rotation within said cutter housing; said cutter housing comprising a lumen and an open distal end; said cutter comprising proximal and distal ends, a central body and a plurality of flanges extending radially outward from said central body; and a stationary member positioned on said cutter housing axially adjacent to said flanges and comprising a shearing edge to shear material between said stationary member and said flanges when material is received into said open distal end of said cutter housing.

Claim 8

Dependent Claim 28 words

6 . The device of claim 5 further comprising a screw thread on said central body of said cutter, said screw thread being formed distally of said flanges.

Claim 9

Dependent Claim 19 words

7 . The device of claim 5 , wherein said stationary member extends radially inward into said housing lumen.

Claim 10

Dependent Claim 27 words

8 . The device of claim 7 , wherein said stationary member defines a shear plane and said shear plane precluding thrombus build-up within said housing lumen.

Claim 11

Dependent Claim 80 words

9 . A material removal tip for a catheter-mounted device, comprising: a rotatable member having a body and at least one circumferentially spaced outwardly projecting shearing member; and a generally tubular housing sized to receive said rotatable member, said housing including at least one stationary shearing member located axially adjacent said shearing member on said rotatable member for shearing material received in said housing between said adjacent rotating and stationary shearing members and reduce the clogging propensity of said material.

Claim 12

Dependent Claim 80 words

9 . A material removal tip for a catheter-mounted device, comprising: a rotatable member having a body and at least one circumferentially spaced outwardly projecting shearing member; and a generally tubular housing sized to receive said rotatable member, said housing including at least one stationary shearing member located axially adjacent said shearing member on said rotatable member for shearing material received in said housing between said adjacent rotating and stationary shearing members and reduce the clogging propensity of said material.

Claim 13

Dependent Claim 76 words

10 . The device of claim 9 , wherein said housing includes proximal and distal sections, said distal section defining a first lumen for closely receiving said rotatable member, said proximal section defining a second lumen coaxial with said first lumen, and a larger annular groove formed between said first and second lumens for receiving said rotatable shearing members and axially restricting movement of said rotatable member, said stationary shearing member being located adjacent said groove.

Claim 14

Dependent Claim 23 words

11 . The device of claim 9 , wherein said stationary shearing member is located distally with respect to said rotating shearing member.

Claim 15

Dependent Claim 23 words

12 . The device of claim 9 , wherein said stationary shearing member is located proximally with respect to said rotating shearing member.

Claim 16

Dependent Claim 76 words

13 . The device of claim 9 , wherein said housing includes proximal and distal sections, said distal section defining a first lumen for closely receiving said rotatable member, said proximal section defining a second lumen coaxial with said first lumen, and a larger annular groove formed between said first and second lumens for receiving said rotatable shearing members and axially restricting movement of said rotatable member, said stationary shearing member being located adjacent said groove.

Claim 17

Dependent Claim 30 words

14 . The device of claim 13 , wherein said stationary shearing member is located distally with respect to said rotatable shearing members and projects inwardly from said first lumen.

Claim 18

Dependent Claim 30 words

15 . The device of claim 13 , wherein said stationary shearing member is located proximally with respect to said rotatable shearing members and projects inwardly from said second lumen.

Claim 19

Dependent Claim 44 words

16 . The device of claim 13 , wherein said housing is formed in one piece, and said rotatable shearing members are cantilevered with respect to said body of said rotatable member to enable said rotatable shearing members to be snap-fit into said groove.

Claim 20

Dependent Claim 25 words

17 . The device of claim 13 , wherein said proximal and distal sections of said housing are separate pieces with said groove defined therebetween.

Claim 21

Dependent Claim 22 words

18 . The device of claim 17 , wherein said stationary shearing member is formed on said distal section of said housing.

Claim 22

Dependent Claim 22 words

19 . The device of claim 17 , wherein said stationary shearing member is formed on said proximal section of said housing.

Claim 23

Dependent Claim 50 words

20 . The device of claim 9 having at least about a plurality of said stationary and said rotatable shearing members, wherein said stationary shearing members extend radially inward into close proximity with said bodies of said rotatable members to define shearing planes for simultaneous coarse, medium and fine cutting.

Claim 24

Dependent Claim 20 words

21 . The device of claim 9 having a total preselected diameter effective for use in a preselected body lumen.

Claim 25

Dependent Claim 17 words

22 . The device of claim 21 , wherein said preselected body lumen is a blood vessel.

Claim 26

Dependent Claim 17 words

23 . The device of claim 9 , wherein said generally tubular housing is a one-piece housing.

Claim 27

Dependent Claim 29 words

24 . The device of claim 9 , wherein said generally tubular housing is fabricated from at least two pieces, wherein said pieces are joined by means for joining.

Claim 28

Dependent Claim 28 words

25 . The device of claim 24 , wherein said means for joining are selected from the group consisting of welds, adhesives, press-fitting and mechanical means for interlocking.

Claim 29

Dependent Claim 77 words

26 . A cutter tip for a surgical instrument comprising: a cutter having a body and at least one circumferentially spaced outwardly projecting flange; and a generally tubular cutter housing sized to receive said cutter, said cutter housing including at least one stationary shearing member located axially adjacent said flange on said cutter for shearing material received in said cutter housing between said flange and said stationary shearing members and reduce the clogging propensity of said material.

Claim 30

Dependent Claim 77 words

26 . A cutter tip for a surgical instrument comprising: a cutter having a body and at least one circumferentially spaced outwardly projecting flange; and a generally tubular cutter housing sized to receive said cutter, said cutter housing including at least one stationary shearing member located axially adjacent said flange on said cutter for shearing material received in said cutter housing between said flange and said stationary shearing members and reduce the clogging propensity of said material.

Claim 31

Dependent Claim 73 words

27 . The device of claim 26 , wherein said cutter housing includes proximal and distal sections, said distal section defining a first lumen for closely receiving said cutter, said proximal section defining a second lumen coaxial with said first lumen, and a larger annular race formed between said first and second lumens for receiving said flange and axially restricting movement of said cutter, said stationary shearing member being located adjacent said race.

Claim 32

Dependent Claim 22 words

28 . The device of claim 26 , wherein said stationary shearing member is located distally with respect to said rotating flange.

Claim 33

Dependent Claim 22 words

29 . The device of claim 26 , wherein said stationary shearing member is located proximally with respect to said rotating flange.

Claim 34

Dependent Claim 74 words

30 . The device of claim 26 , wherein said cutter housing includes proximal and distal sections, said distal section defining a first lumen for closely receiving said cutter, said proximal section defining a second lumen coaxial with said first lumen, and a larger annular race formed between said first and second lumens for receiving said rotatable flange and axially restricting movement of said cutter, said stationary shearing member being located adjacent said groove.

Claim 35

Dependent Claim 29 words

31 . The device of claim 30 , wherein said stationary shearing member is located distally with respect to said rotatable flange and projects inwardly from said first lumen.

Claim 36

Dependent Claim 29 words

32 . The device of claim 30 , wherein said stationary shearing member is located proximally with respect to said rotatable flange and projects inwardly from said second lumen.

Claim 37

Dependent Claim 42 words

33 . The device of claim 30 , wherein said cutter housing is formed in one piece, and said rotatable flanges are cantilevered with respect to said body of said cutter to enable said rotatable flanges to be snap-fit into said race.

Claim 38

Dependent Claim 26 words

34 . The device of claim 30 , wherein said proximal and distal sections of said cutter housing are separate pieces with said race defined therebetween.

Claim 39

Dependent Claim 23 words

35 . The device of claim 34 , wherein said stationary shearing member is formed on said distal section of said cutter housing.

Claim 40

Dependent Claim 23 words

36 . The device of claim 34 , wherein said stationary shearing member is formed on said proximal section of said cutter housing.

Claim 41

Dependent Claim 50 words

37 . The device of claim 26 having at least about a plurality of said stationary shearing members and said rotatable flanges, wherein said stationary shearing members extend radially inward into close proximity with said bodies of said flanges to define shearing planes for simultaneous coarse, medium and fine cutting.

Claim 42

Dependent Claim 20 words

38 . The device of claim 26 having a total preselected diameter effective for use in a preselected body lumen.

Claim 43

Dependent Claim 17 words

39 . The device of claim 38 , wherein said preselected body lumen is a blood vessel.

Claim 44

Dependent Claim 18 words

40 . The device of claim 26 , wherein said generally tubular cutter housing is a one-piece housing.

Claim 45

Dependent Claim 30 words

41 . The device of claim 26 , wherein said generally tubular cutter housing is fabricated from at least two pieces, wherein said pieces are joined by means for joining.

Claim 46

Dependent Claim 28 words

42 . The device of claim 41 , wherein said means for joining are selected from the group consisting of welds, adhesives, press-fitting and mechanical means for interlocking.

Claim 47

Dependent Claim 118 words

43 . A method of removing thrombus material from a thrombectomy site, the method comprising: providing a rotational medical device comprising: an elongate flexible tubular body having a proximal end, a distal end, and an elongate central lumen; and a vacuum system coupled to said elongate flexible tubular body, said vacuum system comprising a vacuum manifold having first and second outlets, said vacuum manifold being connected to a hose at said first outlet and a motor at said second outlet; placing said distal end of said elongate flexible tubular body in proximity to a thrombus at said thrombectomy site; and activating said vacuum system such that a portion of said thrombus is drawn into said elongate central lumen.

Claim 48

Dependent Claim 118 words

43 . A method of removing thrombus material from a thrombectomy site, the method comprising: providing a rotational medical device comprising: an elongate flexible tubular body having a proximal end, a distal end, and an elongate central lumen; and a vacuum system coupled to said elongate flexible tubular body, said vacuum system comprising a vacuum manifold having first and second outlets, said vacuum manifold being connected to a hose at said first outlet and a motor at said second outlet; placing said distal end of said elongate flexible tubular body in proximity to a thrombus at said thrombectomy site; and activating said vacuum system such that a portion of said thrombus is drawn into said elongate central lumen.

Rotational atherectomy system with stationary cutting elements

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