Methods And Devices For Embolic Protection

• US 20140364897A1
• Filed: 06/10/2014
• Published: 12/11/2014
• Est. Priority Date: 06/10/2013
• Status: Active Grant

• Current Assignee: Subbarao V. Myla
• Original Assignee: Subbarao V. Myla
• Inventors: Myla, Subbarao V.
• Granted Patent: US 9,968,434 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0069 cylindrical

Abstract

An aortic flow diverter or filter is described that diverts particles away from the carotid vessels and right subclavian artery. The diverter includes a stent-like portion formed from a plurality of braided or woven wires that can radially self-expand. The stent-like portion is generally tubular and is fixed over the distal end of a catheter or shaft. A sheath is located over both the catheter and stent-like portion, maintaining the stent-like portion in a compressed configuration. When withdrawn proximally, the sheath releases the stent-like portion, allowing it to expand against the walls of the vessel.

Claims

1. A method of protecting a patient from embolism during a surgical procedure comprising:

directing a delivery catheter through the right subclavian artery of a patient to a left common carotid artery of the patient;

deploying a stent-like device in said left common carotid artery and said right subclavian artery from said delivery catheter such that apposition of said stent-like device is substantially achieved on the walls of said left common carotid artery and said right subclavian artery;

performing a valve replacement procedure;

retrieving said stent-like device.

2. The method of claim 1, wherein said deploying said stent-like device further comprises proximally retracting a sheath and allowing radial expansion of said stent-like device.

3. The method of claim 1, wherein a proximal end of said stent-like device is fixed to a shaft positioned through said stent-like device.

4. The method of claim 3, wherein a distal end of said stent-like device is fixed to a shaft positioned through said stent-like device.

5. The method of claim 1, wherein said deploying said stent-like device is followed by diverting passage of emboli into said right subclavian artery and said left common carotid artery with said stent-like device.

6. The method of claim 1, wherein said deploying said stent-like device is followed by capturing emboli from blood passing into said right subclavian artery and said left common carotid artery with said stent-like device.

7. A device for protecting a patient from embolism during a surgical procedure comprising:

a tubular, radially self-expanding, stent-like device composed of a plurality of woven wires and having a length sized to extend at least between a left common carotid artery and a right subclavian artery;

said plurality of woven wires forming a plurality of pores that each have a pore size sufficient to divert substantially all emboli away from cerebral vessels.

8. The device of claim 7, wherein a proximal end of said stent-like device is fixed to a catheter shaft.

9. The device of claim 8, wherein a distal end of said stent-like device is fixed to a catheter shaft.

10. The device of claim 7, wherein said stent-like device comprises a first layer connected to a second layer.

11. The device of claim 7, wherein said plurality of woven wires are comprised of a first set of wires having a first diameter and a second set of wires having a second diameter.

12. The device of claim 7, further comprising a sheath positioned over said stent-like device so as to maintain said stent-like device in a radially compressed configuration, and being further retractable from over said stent-like device so as to allow said stent-like device to radially expand.

13. The device of claim 7, wherein a distal end of said stent-like device includes a plurality of anchor members.

14. The device of claim 7, wherein said pore size is within a range of 150-200 microns.

15. The device of claim 7, wherein said plurality of woven wires have a diameter within a range of 0.002-0.004 inches.

16. The device of claim 7, wherein said plurality of woven wires have a diameter within a range of 0.0010-0.0020 inches.

17. The device of claim 7, wherein a distal end and a proximal end of said stent-like device are fixed on to a catheter;

wherein said stent-like device is composed of two woven layers;

wherein said stent-like device is maintained in an unexpanded configuration by a sheath positioned over the stent-like device; and

wherein said pore size is within a range of 150-200 microns.

18. The device of claim 7, wherein said length of said stent-like device is within a range of 3-12 inches.

19. A method of protecting a patient from embolism during a surgical procedure comprising:

advancing a delivery catheter system through the right subclavian artery of a patient to a left common carotid artery of the patient;

distally retracting a tubular sheath to expose a stent-like device located on a distal end of an inner catheter shaft, so as to allow said stent-like device to radially expand from a first compressed diameter to a second expanded diameter;

continuing to distally retract said tubular sheath until said stent-like device is exposed and in said second expanded diameter between said left common carotid artery and said right subclavian artery;

performing an aortic valve replacement procedure;

distally advancing said sheath over said stent-like device so as to contract said stent-like device from said second expanded diameter to said first compressed diameter;

withdrawing said delivery catheter system.