Axial lengthening thrombus capture system

• US 9,844,386 B2
• Filed: 04/28/2017
• Issued: 12/19/2017
• Est. Priority Date: 08/06/2015
• Status: Active Grant

• Current Assignee: Vascular Medcure Incorporated (Medtronic Plc)
• Original Assignee: KP Medcure, Inc.
• Inventors: Nguyen, Thanh Van, Nguyen, Duy, Ngo, Tung Hoang
• Primary Examiner(s): Woo, Julian W
• Application Number:
  US15/581,272
• Publication Number:
  US 20170224366A1
• Time in Patent Office: 235 Days
• 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 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 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/00871 polymeric
• CPC Class Codes: A61B 2017/00893 pharmaceutically effective
• CPC Class Codes: A61B 2017/00938 hydrophobic
• CPC Class Codes: A61B 2017/00942 hydrophilic
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22079 with suction of debris
• CPC Class Codes: A61B 2017/22081 Treatment of vulnerable plaque
• CPC Class Codes: A61B 2017/22084 stone- or thrombus-dissolving
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2217 single wire changing shape to a gripping configuration
• CPC Class Codes: A61B 2017/320052 Guides for cutting instruments by marking A61B2090/395
• CPC Class Codes: A61B 2017/320716 comprising means for preventing embolism by dislodged material
• CPC Class Codes: A61B 2017/320775 Morcellators, impeller or propeller like means
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: H05K 999/99 dummy group

Abstract

Systems and methods can remove material of interest, including blood clots, from a body region, including but not limited to the circulatory system for the treatment of pulmonary embolism (PE), deep vein thrombosis (DVT), cerebrovascular embolism, and other vascular occlusions.

Claims

1. A clot capture system, comprising:

a first member comprising a central lumen;

a second member; and

a shape memory body comprising a first end, a second end, and an axial length therebetween, the first end having an opening, the second end attached to the second member,

wherein at least part of the shape memory body is compressed within the central lumen of the first member in a first configuration,

wherein the shape memory body is transformable to a second configuration in which the first end is expanded while the second end and a majority of the shape memory body remains compressed within the central lumen of the first member and the second end is positioned proximal to the first end and the shape memory body has a first expanded axial length and a first width along the first expanded axial length,

wherein the shape memory body is transformable to a third configuration via movement between the first member and the second member in which the shape memory body has a second expanded axial length greater than the first expanded axial length and the shape memory body has a second width along the second expanded axial length, wherein the second width of the shape memory body along the second expanded axial length is substantially the same as the first width of the shape memory body along the first expanded axial length.

2. The clot capture system of claim 1, further comprising a capture guide attached to the opening of the first end.

3. The clot capture system of claim 2, wherein the capture guide at least partially circumscribes the opening of the first end.

4. The clot capture system of claim 2, wherein the capture guide fully partially circumscribes the opening of the first end.

5. The clot capture system of claim 2, further comprising an expandable cover element circumscribing the capture guide.

6. The clot capture system of claim 5, wherein the expandable cover element is inflatable.

7. The clot capture system of claim 2, further comprising a control line extending proximally from the capture guide.

8. The clot capture system of claim 1, further comprising a sleeve attached to the first member and the opening of the first end of the shape memory body.

9. The clot capture system of claim 1, wherein the shape memory body is configured to invert, evert, or roll out with respect to the first member or the second member.

10. The clot capture system of claim 1, wherein the end opening of the first end of the shape memory body is proximal-facing.

11. The clot capture system of claim 1, wherein the shape memory body comprises a mesh.

12. The clot capture system of claim 1, wherein the shape memory body comprises a laser cut structure.

13. The clot capture system of claim 1, wherein the shape memory body comprises at least one wire strand.

14. The clot capture system of claim 1, wherein the shape memory body comprises a stent.

15. The clot capture system of claim 1, wherein the shape memory body is configured to allow fluid flow therethrough.

16. The clot capture system of claim 1, wherein the second member comprises a lumen.

17. The clot capture system of claim 1, further comprising an expanding guide element.

18. The clot capture system of claim 17, wherein the expanding guide element comprises an open funnel distal tip.

19. The clot capture system of claim 18, wherein the open funnel distal tip is porous to allow flow.

20. A system for capturing material of interest within a body lumen, comprising:

a first member comprising a central lumen;

a second member; and

a shape memory body comprising a first end, a second end, and an axial length therebetween, the first end having an end opening, the second end coupled to the second member,

wherein at least part of the shape memory body is compressed within the central lumen of the first member in a first configuration,

wherein the shape memory body is transformable to a second configuration in which the opening is expanded and a first segment of the shape memory body extending axially in a first direction from the opening is expanded to a fold point, the first segment having a first expanded axial length, and a second segment of the shape memory body extending axially from the fold point to the second end of the shape memory body in a second direction opposite the first direction is relatively compressed with respect to the first segment, the second end positioned proximal to the first end;

wherein the shape memory body is transformable to a third configuration via movement between the first member and the second member in which the axial length of the first segment increases to a second expanded axial length, the second expanded axial length greater than the first expanded axial length, wherein a width of the shape memory body along the second expanded axial length is substantially the same as a width of the shape memory body along the first expanded axial length.

21. A clot capture system, comprising:

a first member comprising a central lumen;

a second member; and

a shape memory body comprising a first end, a second end, and an axial length therebetween, the first end having an end opening, the second end attached to the second member,

wherein at least part of the shape memory body is compressed within the central lumen of the first member in a first delivery configuration,

wherein the shape memory body is transformable to a second configuration in which the first end is expanded while the second end and a majority of the shape memory body remains radially compressed within the central lumen of the first member and the second end is positioned proximal to the first end and the shape memory body has a first expanded axial length,

wherein the shape memory body is transformable to a third configuration via movement of the first member with respect to the second member in which the shape memory body has a second expanded axial length greater than the first expanded axial length, wherein a width of the shape memory body along its second expanded axial length is substantially the same as a width of the shape memory body along its first expanded axial length.