Methods and devices for embolic protection

• US 10,575,937 B2
• Filed: 04/12/2018
• Issued: 03/03/2020
• Est. Priority Date: 06/10/2013
• Status: Active Grant

• Current Assignee: Subbarao V. Myla
• Original Assignee: Subbarao V. Myla
• Inventors: Myla, Subbarao V.
• Primary Examiner(s): Orkin, Alexander J
• Application Number:
  US15/952,151
• Publication Number:
  US 20180228591A1
• Time in Patent Office: 691 Days
• 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 When withdrawn proximally, the sheath releases the stent-like portion, allowing it to expand against the walls of the vessel.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. An aortic flow diverter for protecting a patient from embolism during a surgical procedure, comprising:

a stent-like device comprising;

an outer tubular layer braided from wires having a diameter within a range of about 0.002 to 0.004 inch;

an inner tubular layer braided from wires within a range of about 0.0010 to 0.0020 inch;

said inner tubular layer being disposed within said outer tubular layer and being physically connected to said outer tubular layer at a plurality of locations; and

,

a catheter fixed to said stent-like device;

wherein said outer tubular layer and said inner tubular layer have substantially the same length within a range of 3-12 inches; and

,

wherein said inner tubular layer is open at its distal end and said outer tubular layer is closed to form a cone shape distally beyond said inner tubular layer.

2. The aortic flow diverter of claim 1, further comprising a sheath disposed over said catheter, said outer tubular layer, and said inner tubular layer.

3. The aortic flow diverter of claim 1, wherein the catheter further comprises a shaft and wherein a proximal end of said stent-like device is fixed to said shaft that is positioned through said stent-like device.

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

5. The aortic flow diverter of claim 4, further comprising a nose cone fixed at a distal end of said shaft of said catheter and distal of said stent-like device.

6. The aortic flow diverter of claim 3, wherein said catheter and said shaft of said catheter have a passage sized to accommodate a guidewire.

7. An aortic flow diverter for protecting a patient from embolism during a surgical procedure, comprising:

a stent-like device comprising;

an outer tubular layer braided from wires having a diameter within a range of about 0.002 to 0.004 inch;

an inner tubular layer braided from wires within a range of about 0.0010 to 0.0020 inch;

said inner tubular layer being disposed within said outer tubular layer and being physically connected to said outer tubular layer at a plurality of locations; and

,

a catheter fixed to said stent-like device;

wherein said outer tubular layer and said inner tubular layer have substantially the same length within a range of 3-12 inches; and

,

wherein said outer tubular layer is open at its distal end and said inner tubular layer is closed to form a cone shape.

8. The aortic flow diverter of claim 7, further comprising a plurality of anchor members radially disposed on said outer tubular layer.

9. The aortic flow diverter of claim 7, wherein said inner tubular layer forms a pore size between 150 to 200 microns, and said outer tubular layer forms a pore size between 200 to 250 microns.

10. The aortic flow diverter of claim 7, further comprising a sheath disposed over said catheter, said outer tubular layer, and said inner tubular layer.

11. The aortic flow diverter of claim 7, wherein the catheter further comprises a shaft and wherein a proximal end of said stent-like device is fixed to said shaft that is positioned through said stent-like device.

12. The aortic flow diverter of claim 11, wherein a distal end of said stent-like device is fixed to said shaft positioned through said stent-like device.

13. The aortic flow diverter of claim 12, further comprising a nose cone fixed at a distal end of said shaft of said catheter and distal of said stent-like device.

14. The aortic flow diverter of claim 13, wherein said catheter and said shaft of said catheter have a passage sized to accommodate a guidewire.

15. An aortic flow diverter for protecting a patient from embolism during a surgical procedure, comprising:

a stent-like device comprising;

an outer tubular layer braided from wires having a diameter within a range of about 0.002 to 0.004 inch;

an inner tubular layer braided from wires within a range of about 0.0010 to 0.0020 inch;

said inner tubular layer being disposed within said outer tubular layer and being physically connected to said outer tubular layer at a plurality of locations; and

,

a catheter permanently fixed to a proximal end of said stent-like device;

wherein said outer tubular layer and said inner tubular layer have substantially the same length within a range of 3-12 inches; and

,

wherein said inner tubular layer is open at its distal end and said outer tubular layer is closed to form a cone shape distally beyond said inner tubular layer.