Rotational thrombectomy wire

• US 8,663,259 B2
• Filed: 04/27/2011
• Issued: 03/04/2014
• Est. Priority Date: 05/13/2010
• Status: Expired due to Fees

• Current Assignee: REX Medical LP
• Original Assignee: REX Medical LP
• Inventors: Levine, Marc-Alan, Leedle, Michael, Leedle, John D.
• Primary Examiner(s): SEVERSON, RYAN J
• Application Number:
  US13/095,329
• Publication Number:
  US 20110282370A1
• Time in Patent Office: 1,042 Days
• Field of Search: 606110-115, 606/127, 606/128, 606/159, 606/170, 606/180
• US Class Current: 606/159
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 2017/00331 with preformed bends
• CPC Class Codes: A61B 2017/320733 with a flexible cutting or scraping element, e.g. with a whip-like distal filament member
• CPC Class Codes: A61B 2017/320775 Morcellators, impeller or propeller like means

Abstract

A rotational thrombectomy wire for breaking up vascular thrombus or other obstructive material having a core having a proximal portion and a distal portion. The distal portion has a smaller diameter than the proximal portion. A cable extends distally of the core. The cable has a first covering material positioned external thereof. A first coil is attached to a distal portion of the cable and has a diameter larger than a diameter of the cable and has a second covering material positioned thereover. The wire is rotatable by a motor.

Claims

1. A rotational thrombectomy wire for breaking up vascular thrombus or other obstructive material, the thrombectomy wire comprising a core having a proximal portion and a distal portion, the distal portion having a smaller diameter than the proximal portion, a cable extending distally of the core and having a first covering material positioned external thereof, a first coil attached to a distal portion of the cable, the first coil having a diameter larger than a diameter of the cable and having a second covering material positioned thereover, the wire being rotatable by a motor, the wire having a sinuous distal portion to create a wave pattern upon rotation to macerate thrombus.

2. The thrombectomy wire of claim 1, further comprising a second coil positioned over a region of the distal portion of the core and spaced proximally of the first coil.

3. The thrombectomy wire of claim 1, wherein the first coil has a first length and the first coil is positioned at an angle to a longitudinal axis of the wire.

4. The thrombectomy wire of claim 1, wherein the first covering material comprises a polymer jacket.

5. The thrombectomy wire of claim 1, wherein the second covering material comprises a heat shrink tubing.

6. The thrombectomy wire of claim 1, wherein the cable has multiple layers of polymeric material positioned thereover, wherein the layers create a larger diameter proximal region.

7. The thrombectomy wire of claim 1, wherein the cable has variable stiffness such that a distal portion of the cable has a lower stiffness than a proximal portion.

8. The thrombectomy wire of claim 1, wherein the wire has a connector at a proximal portion for connection by the user to a housing containing a motor.

9. The thrombectomy wire of claim 1, wherein the wire terminates in a J-tip.

10. The thrombectomy wire of claim 1, further comprising a hypotube, the hypotube coupling the cable to the core.

11. A rotational thrombectomy wire for breaking up vascular thrombus or other obstructive material, the thrombectomy wire comprising a core having a proximal portion and a distal portion, the distal portion having a smaller diameter than the proximal portion, a cable extending distally of the core and having a first covering material positioned external thereof, a first coil attached to a distal portion of the cable, the first coil having a diameter larger than a diameter of the cable and having a second covering material positioned thereover, the wire being rotatable by a motor, and a third covering material interposed between the cable and first covering material.

12. The thrombectomy wire of claim 11, wherein the first coil and a portion of the cable underlying the first coil has a sinuous shape.

13. A thrombectomy apparatus for breaking up vascular thrombus or other obstructive material, the apparatus comprising:

a wire comprising a core having a proximal portion and a distal portion, the distal portion having a smaller diameter than the proximal portion, a cable extending distally of the core and having a proximal portion and a distal portion, a first coil attached to the distal portion of the cable and spaced from a proximal portion of the cable, the first coil having a diameter larger than a diameter of the cable and having a first covering material positioned thereover, the wire being rotatable by a motor; and

a housing including a motor to rotate the wire, the wire selectively connectable to the motor by a user.

14. The apparatus of claim 13, further comprising a hypotube connecting the cable to the core.

15. The apparatus of claim 13, further comprising a battery contained in the housing to power the motor.

16. The apparatus of claim 13, further comprising an adjustment mechanism to adjust the speed of the motor.

17. The apparatus of claim 13, further comprising a sheath extending from the housing and slidable between a distal position to cover the first coil and a proximal position to expose the first coil, wherein movement of the sheath to the proximal position allows the first coil to move to a non-linear position.

18. The apparatus of claim 13, further comprising a gear reducer connected to the motor and a coupling tube extending from the reducer to detachably connect the thrombectomy wire to the motor.

19. The apparatus of claim 13, wherein the wire is connectable to a motor coupler by a friction fit.

20. The apparatus of claim 13, wherein the wire is connectable to a motor coupler by a bayonet mount.