Non-Occlusive Dilation Devices

• US 20110082490A1
• Filed: 05/14/2010
• Published: 04/07/2011
• Est. Priority Date: 05/15/2009
• Status: Active Grant

• Current Assignee: Merit Medical Ireland, Limited (Merit Medical Systems, Inc.)
• Original Assignee: LeMaitre Vascular, Incorporated
• Inventors: Egan, Jennifer, Ramaiah, Venkatesh, McNutt, Robert, Connelly, Ryan
• Granted Patent: US 8,784,467 B2
• Time in Patent Office: Days
• US Class Current: 606/194
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

Non-occlusive modeling catheters including a dilation device for expanding an endoprosthesis implanted in a vessel are disclosed. In an embodiment, a modeling catheter includes a device comprising a plurality of compliant wires braided in a double overlapping pattern and having a length spanning between a proximal end of the device and a distal end of the device, wherein the device is positioned in at least a portion of an endoprosthesis implanted in a vessel, wherein, when the device is in a relaxed state, a plurality of spaces are formed between the plurality of wires to allow fluid to move freely through the plurality of spaces, and wherein, when the device is in a dilated state, the plurality of wires are sufficiently designed to exert a radial force on the endoprosthesis while continually allowing the fluid to move freely through the plurality of spaces.

Claims

1. A device comprising:

a plurality of compliant wires braided in a double overlapping pattern and having a length spanning between a proximal end of the device and a distal end of the device,

wherein the device is positioned in at least a portion of an endoprosthesis implanted in a single vessel,

wherein, when the device is in a relaxed state, a plurality of spaces are formed between the plurality of wires to allow fluid to move freely through the plurality of spaces,

wherein, when the device is in a dilated state, the plurality of wires are sufficiently designed to exert a radial force on the endoprosthesis while continually allowing the fluid to move freely through the plurality of spaces, and

wherein, when the device is in the dilated state, the plurality of wires are sufficiently designed to conform to a diameter disparity ratio in the single vessel ranging from about 1;

1 to about 10;

1.

2. The device of claim 1 wherein the device is positioned in the endoprosthesis to enhance primary attachment of the endoprosthesis to the single vessel.

3. The device of claim 1 wherein the device is positioned in the endoprosthesis to repair a collapse in the endoprosthesis.

4. The device of claim 1 wherein the device is positioned in the endoprosthesis to repair infolding of the endoprosthesis.

5. The device of claim 1 wherein the device is positioned in the endoprosthesis to repair an endoleak in the endoprosthesis.

6. The device of claim 1 wherein the plurality of spaces formed between the plurality of wires range from about 0.5 mm² to about 5 mm².

7. The device of claim 1 wherein, when the device is in the dilated state, the radial force exerted on the endoprosthesis by the plurality of wires ranges from about 0 psi to about 20 psi.

8. The device of claim 1 wherein the plurality of wires have a length ranging from about 5 cm to about 25 cm.

9. The device of claim 1 wherein the plurality of the wires have a braid density ranging from about 2 ppi to about 19 ppi.

10. The device of claim 1 wherein, when the device is in the relaxed state, at least a portion of the device has a diameter ranging from about 5 mm to about 30 mm.

11. The device of claim 1 wherein, when the device is in the dilated state, at least a portion of the device has a diameter ranging from about 10 mm to about 70 mm.

12. The device of claim 1 wherein the single vessel having the implanted endoprosthesis is substantially straight.

13. The device of claim 1 wherein the single vessel having the implanted endoprosthesis has a bend.

14. The device of claim 13 wherein, when the device is in the relaxed state, the plurality of wires are sufficiently designed to conform to a curvature in the single vessel so that a bend radius of the device ranges from about 10 mm to about 130 mm.

15. The device of claim 13 wherein, when the device is in the dilated state, the radial force exerted on the endoprosthesis by the plurality of wires at an inner curvature of the bend and an outer curvature of the bend is approximately equal and ranges from about 0 psi to about 20 psi.

16. A device comprising:

a plurality of compliant wires braided in a double overlapping pattern and having a length spanning between a proximal end of the device and a distal end of the device,

wherein the device is sufficiently designed to expand from a relaxed state to a dilated state,

wherein the device is positioned in at least a portion of an endoprosthesis implanted in a bifurcated vessel,

wherein, when the device is in the relaxed state, the overlapping pattern creates a plurality of spaces between the plurality of wires allowing fluid to move freely through the plurality of spaces,

wherein, when the device is in the dilated state, the plurality of wires are sufficiently designed to exert a radial force on the endoprosthesis while continually allowing the fluid to move freely through the plurality of spaces, and

wherein, when the device is in the dilated state, the plurality of wires are sufficiently designed to conform to a multi-vessel diameter disparity ratio in the bifurcated vessel ranging from about 2;

1 to 20;

1.

17. The device of claim 16 wherein the device is positioned in the endoprosthesis to enhance primary attachment of the endoprosthesis to the single vessel.

18. The device of claim 16 wherein the device is positioned in the endoprosthesis to repair a collapse in the endoprosthesis.

19. The device of claim 16 wherein the device is positioned in the endoprosthesis to repair infolding of the endoprosthesis.

20. The device of claim 16 wherein the device is positioned in the endoprosthesis to repair an endoleak in the endoprosthesis.

21. The device of claim 16 wherein the plurality of spaces formed between the plurality of wires range from about 0.5 mm² to about 5 mm².

22. The device of claim 16 wherein, when the device is in the dilated state, the radial force exerted on the endoprosthesis by the plurality of wires ranges from about 0 psi to about 20 psi.

23. The device of claim 16 wherein the plurality of wires have a length ranging from about 5 cm to about 25 cm.

24. The device of claim 16 wherein the plurality of the wires have a braid density ranging from about 2 ppi to about 19 ppi.

25. The device of claim 16 wherein, when the device is in the relaxed state, at least a portion of the device has a diameter ranging from about 5 mm to about 30 mm.

26. The device of claim 16 wherein, when the device is in the dilated state, at least a portion of the device has a diameter ranging from about 10 mm to about 70 mm.

27. A modeling assembly comprising:

a device comprising a plurality of compliant wires braided in an overlapping pattern and having a length spanning between a proximal end of the device and a distal end of the device, wherein a plurality of spaces are formed between the plurality of compliant wires to allow fluid to move freely through the plurality of spaces;

a central tube having a proximal portion, a distal portion, and a central portion passing through the device;

an outer tube positioned coaxially around the proximal portion of the central tube and engaging the proximal end of the device;

a proximal retention end engaging the outer tube at a first end and engaging the proximal end of the device at a second end;

a distal retention end engaging the central tube at a first end and engaging the distal end of the device at a second end; and

a retractable sheath positioned coaxially around the outer tube and slidably moveable over the device to selectively collapse the device, relax the device, and dilate the device.