SYSTEMS AND METHODS FOR INTRAVASCULAR OBSTRUCTION REMOVAL

• US 20180028209A1
• Filed: 02/05/2016
• Published: 02/01/2018
• Est. Priority Date: 02/06/2015
• Status: Active Grant

• Current Assignee: Rapid Medical Ltd.
• Original Assignee: Rapid Medical Ltd.
• Inventors: SUDIN, Yuri, FRIEDMAN, Aharon, ECKHOUSE, Ronen
• Granted Patent: US 11,083,473 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/22001 Angioplasty, e.g. PCTA
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop

Abstract

Intraluminal devices and methods for removing an obstruction from a blood vessel using an intraluminal device are provided. The intraluminal device can include a flexible shaft and an expandable wire mesh structure extending from the flexible shaft, the wire mesh structure including at least one first expandable section having a first wire arrangement pattern and at least one second expandable section having a second wire arrangement pattern different from the first wire arrangement pattern. In addition, interstices in the at least one first expandable section can differ in size from interstices in the at least one second expandable section.

Claims

1. An intraluminal device, comprising:

a flexible shaft;

an expandable wire mesh structure extending from the flexible shaft, the wire mesh structure including at least one first expandable section having a first wire arrangement pattern and at least one second expandable section having a second wire arrangement pattern different from the first wire arrangement pattern; and

wherein interstices in the at least one first expandable section differ in size from interstices in the at least one second expandable section.

2. The intraluminal device of claim 1, wherein wire of the at least one first expandable section is braided and wire of the at least one second expandable section is non-braided.

3. The intraluminal device of claim 2, wherein interstices of the at least one non-braided second section are larger than interstices of the at least one braided first section.

4. The intraluminal device of claim 2, wherein the at least one first expandable section includes at least two braided sections separated by a non-braided section.

5. The intraluminal device of claim 2, wherein the at least one second expandable section includes at least two non-braided sections separated by a braided section.

6. The intraluminal device of claim 2, wherein the at least one second expandable section includes a plurality of non-braided sections, each disposed between two braided sections.

7. The intraluminal device of claim 1, wherein the shaft includes multiple strands of continuous wire that are coiled, and wherein the expandable wire mesh structure is formed from the strands.

8. The intraluminal device of claim 2, further including a control wire extending through the flexible shaft and the expandable mesh structure, the expandable mesh structure being configured to enable a force exerted on the control wire to expand the mesh structure.

9. The intraluminal device of claim 1, wherein interstices in the at least one second expandable section are at least three times larger than interstices in the at least one first expandable section.

10. The intraluminal device of claim 1, wherein interstices in the at least one second expandable section are at least five times larger than interstices in the at least one first expandable section.

11. The intraluminal device of claim 1, wherein the at least one second expandable section has interstices larger than interstices of the at least one first expandable section, and wherein the wire mesh structure has the pattern of the first type on opposing proximal and distal ends thereof.

12. The intraluminal device of claim 1, wherein when expanded, the at least one second expandable section has an outer diameter greater than an outer diameter of the at least one first expandable section.

13. The intraluminal device of claim 12, wherein the at least one second expandable section includes a plurality of second expandable sections with at least one first expandable section located therebetween, resulting in an expandable structure with at least two peaks and one valley.

14. The intraluminal device of claim 12, wherein the at least one first expandable section includes a plurality of first expandable sections, and wherein the at least one second expandable section includes a plurality of second expandable sections, and wherein each second expandable section is interposed between two first expandable sections, resulting in an expandable structure with a plurality of peaks and a plurality of valleys.

15. The intraluminal device of claim 7, wherein the multiple strands include wires having differing cross-sectional shapes.

16. The intraluminal device of claim 7, wherein the multiple strands include wires of differing material.

17. The intraluminal device of claim 7, wherein the multiple strands include at least one wire having a radio-opacity that differs from a radio-opacity of at least one other of the plurality of wires.

18. The intraluminal device of claim 1, wherein interstices in the at least one second expandable section are at least ten times larger than interstices in the at least one first expandable section.

19. The intraluminal device of claim 1, wherein interstices in the at least one second expandable section are twenty times larger than interstices in the at least one first expandable section.

20. A method of removing an obstruction from a vessel, the method comprising:

inserting into the vessel an expandable structure that when expanded, has at least one end region having interstices that are at least three times smaller in size than interstices in a central region;

moving the expandable structure so that at least the central region coincides with the obstruction;

expanding the expandable structure to embed at least a portion of the central region within the obstruction; and

withdrawing from the vessel the expandable structure containing the embedded obstruction.

21. The method of claim 20, wherein the expandable structure is constructed of wire.

22. The method of claim 20, wherein the expandable structure includes a plurality of sections having differing wire arrangement patterns.

23. The method of claim 22, wherein at least one wire arrangement pattern of the expandable structure is braided and at least one of wire arrangement pattern of the expandable structure is non-braided.

24. The method of claim 20, wherein the interstices in the at least one end region are at least five times smaller than interstices in a central region.

25. The method of claim 20, wherein wire of the end region is braided and wire of at least a portion of the central region is unbraided.