Devices and methods for removing occlusions in vessels

• US 20030195536A1
• Filed: 05/08/2003
• Published: 10/16/2003
• Est. Priority Date: 04/10/2001
• Status: Abandoned Application

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Inventors: Cornil, Alain, Bashiri, Mehran
• Application Number:
  US10/434,985
• Publication Number:
  US 20030195536A1
• Time in Patent Office: Days
• US Class Current: 606/159
• CPC Class Codes: A61B 17/32037 for removing obstructions from inner organs or blood vessels, e.g. for atherectomy
• 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 17/320783 through side-hole, e.g. sliding or rotating cutter inside catheter
• CPC Class Codes: A61B 2017/22067 Blocking; Occlusion A61B2017/22054 takes precedence
• CPC Class Codes: A61B 2017/22068 Centering
• CPC Class Codes: A61B 2017/320004 abrasive
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system

Abstract

Occlusion-removing devices that include an inflatable balloon for arresting blood flow and a occlusion-shearing element are provided. Also provided are methods of making and using these devices.

Claims

1. A device for removing occlusions from a vessel, comprising

a housing element having a distal end, a proximal end and a longitudinal axis, wherein one or more lumens are disposed along the longitudinal axis;

an embolism collector element;

a cutting element attached to the distal end of the drive shaft; and

an inflatable balloon.

2. The device of claim 1, further comprising a fluid channel in operable communication with the cutting element.

3. The device of claim 1 or 2, further comprising a casing disposed around cutting element.

4. The device of claim 1, further comprising a drive shaft disposed along the longitudinal axis of the housing.

5. The device of claim 1, further comprising a power source connected to the cutting element.

6. The device of claim 5, wherein the power source comprises a micro electro mechanical system (MEMS) motor.

7. The device of claim 1, wherein the embolism collector element is disposed along the longitudinal axis of the housing.

8. The device of claim 7, wherein the collector element comprises a vacuum aspirator.

9. The device of claim 1, wherein the surface of the cutting element is not smooth.

10. The device of claim 1, wherein the cutting element further comprises perforations therein.

11. The device of claim 1, wherein the lumen of the housing which contacts the cutting element is surface-modified.

12. The device of claim 3, wherein the surface of the casing surrounding the cutting element is surface-modified.

13. The device of claim 11 or claim 12, wherein the surface modification comprises braiding or ribbons.

14. The device of claim 3, wherein the casing extends from the distal end of the housing.

15. The device of claim 3, wherein the casing comprises a cage-like structure.

16. The device of claim 1, wherein the inflatable balloon is capable of centering the cutting element.

17. The device of claim 1, wherein the inflatable balloon is capable of at least partially arresting blood flow around the occlusion.

18. A method of removing an occlusion in a vessel, comprising

accessing a selected site with the device according to claim 1;

inflating the balloon to the desired dimensions;

shearing at least a portion of the embolism with the cutting element; and

removing the sheared fragments of the embolism with the collection element.

19. The method of claim 18, wherein the shearing comprises:

drawing a portion of the embolism into the housing and manipulating the cutting element to shear the embolism against the interior wall of the housing.

20. The method of claim 18, wherein the device further comprises a casing disposed around the cutting element.

21. The method of claim 20, wherein the shearing comprises extending the cutting element and surrounding casing from the distal end of the housing and manipulating the cutting element against the casing.