Rotational thrombectomy wire

• US 9,282,992 B2
• Filed: 06/01/2014
• Issued: 03/15/2016
• Est. Priority Date: 05/13/2010
• Status: Active Grant

• Current Assignee: REX Medical LP
• Original Assignee: REX Medical LP
• Inventors: Levine, Marc-Alan, Leedle, Michael
• Primary Examiner(s): Severson, Ryan J
• Application Number:
  US14/292,923
• Publication Number:
  US 20140324081A1
• Time in Patent Office: 653 Days
• US Class Current: 1/1
• 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 2017/00778 Operations on blood vessels A61B2017/22097, A61B2017/320741 take precedence
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22094 for crossing total occlusions, i.e. piercing
• CPC Class Codes: A61B 2017/320008 Scrapers
• 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 2017/320766 eccentric
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 25/0097 characterised by the hub connectors A61M39/10

Abstract

A rotational thrombectomy wire for breaking up vascular thrombus or other obstructive material having a core having a proximal region and a distal region and being rotatable by a motor. The distal region has a smaller diameter than the proximal region. A cable is coupled to the distal region of the core and extends distally thereof. A torque tube is positioned over the cable and a coil is positioned over a distal portion of the cable. A distal portion of the cable has a non-linear configuration. A first covering material is positioned over the coil.

Claims

1. A method for removing thrombus in a cerebral artery of a patient comprising:

introducing a guidewire and a first catheter into the femoral artery;

advancing the first catheter through the vascular system;

removing the guidewire;

providing a housing and a second catheter extending distally from the housing;

providing an introducer sheath;

inserting a rotational thrombectomy wire through the introducer sheath and through the second catheter;

connecting the introducer sheath to the housing;

advancing the thrombectomy wire within the second catheter to access the cerebral artery;

subsequent to advancing the thrombectomy wire within the second catheter operably coupling a motor to the proximal end of the thrombectomy wire; and

activating the motor to rotate the thrombectomy wire to macerate thrombus in the cerebral artery.

2. The method of claim 1, wherein the step of advancing the thrombectomy wire to access the cerebral artery includes the step of inserting the thrombectomy wire into the circle of Willis.

3. The method of claim 1, further comprising the step of providing a connector tube and attaching a proximal end of the connector tube to a motor housing and a distal end of the connector tube to the introducer sheath.

4. The method of claim 1, further comprising the step of providing a vacuum to remove macerated particles from the artery.

5. The method of claim 1, wherein advancing the thrombectomy wire enables a distal end of the wire to return to a non-linear configuration.

6. The method of claim 1, further comprising the step of introducing fluid through the first catheter.

7. The method of claim 1, wherein the introducer has a stiffness greater than a stiffness of the thrombectomy wire.

8. The method of claim 1, further comprising the step of decoupling the motor from the thrombectomy wire.

9. A method of removing thrombus in an artery of a patient comprising:

introducing a first catheter into the femoral artery;

advancing the first catheter through the vascular system;

inserting a second catheter into the first catheter;

inserting a rotational thrombectomy wire through the second catheter;

subsequent to inserting the rotational thrombectomy wire through the second catheter operatively coupling a proximal portion of the rotational thrombectomy wire to a motor; and

activating the motor to rotate the thrombectomy wire to macerate thrombus in the artery.

10. The method of claim 9, further comprising the steps of inserting a guidewire and introducing the first catheter over the guidewire.

11. The method of claim 9, further comprising the step of providing a valve at a proximal end of the second catheter and inserting the rotational thrombectomy wire through the valve.

12. The method of claim 9, further comprising an introducer sheath, and the step of inserting the thrombectomy wire comprises inserting the wire through the introducer sheath.

13. The method of claim 12, further comprising the step of attaching the introducer sheath to a rotating hemostatic valve.

14. The method of claim 12, wherein the introducer sheath has a stiffness greater than a stiffness of the thrombectomy wire.

15. The method of claim 9, wherein the step of operatively coupling the thrombectomy wire to the motor includes attaching the wire to a drive shaft of the motor.

16. The method of claim 9, wherein advancing the thrombectomy wire enables a distal end of the wire to return to a non-linear configuration.

17. The method of claim 9, further comprising the step of introducing fluid through the first catheter.

18. The method of claim 9, further comprising the step of decoupling the motor from the thrombectomy wire.