Axial lengthening thrombus capture system

• US 10,456,236 B2
• Filed: 03/22/2019
• Issued: 10/29/2019
• 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, Julain W
• Application Number:
  US16/361,757
• Publication Number:
  US 20190216589A1
• Time in Patent Office: 221 Days
• CPC Class Codes: A61B 17/22032 having inflatable gripping elements balloon catheters A61M25/10
• 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
• CPC Class Codes: A61B 2017/00871 polymeric
• CPC Class Codes: A61B 2017/00938 hydrophobic
• CPC Class Codes: A61B 2017/00942 hydrophilic
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22069 Immobilising; Stabilising
• 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 2017/2215 having an open distal end
• CPC Class Codes: A61B 2017/2217 single wire changing shape to a gripping configuration
• CPC Class Codes: A61B 2017/320024 Morcellators, e.g. having a hollow cutting tube with an annular cutter for morcellating and removing tissue
• CPC Class Codes: A61B 2017/320052 Guides for cutting instruments
• 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: A61B 2217/005 : with suction drainage system
• 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: A61F 2002/018 : made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0091 : helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
• CPC Class Codes: A61F 2250/0003 : having an inflatable pocket filled with fluid, e.g. liquid or gas
• CPC Class Codes: A61F 2250/0039 : differing in diameter
• CPC Class Codes: A61M 25/1006 : Balloons formed between concentric tubes

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 material capture system, comprising:

a tubular body comprising a first end and a second end, the first end having an opening,

wherein the tubular body comprises a first configuration in which the first end is expanded and the tubular body has a first expanded axial length, wherein the second end is compressed in the first configuration, wherein the tubular body has a folded portion between the first end and the second end such that a compressed portion of the tubular body is within an expanded portion of the tubular body, wherein the tubular body is configured to surround a thrombus in the first configuration,

wherein, when the thrombus is surrounded by the tubular body, the tubular body is configured to redistribute the thrombus by transforming to a second configuration in which the tubular body has a second expanded axial length greater than the first expanded axial length, and wherein the folded portion is configured to move away from the thrombus to create additional space within the expanded portion of the tubular body,

wherein the tubular body is configured to transform to a third configuration in which the tubular body has a third expanded axial length less than the second expanded axial length.

2. The material capture system of claim 1, wherein the tubular body is configured to be axially expanded, while still maintaining a constant or substantially constant radially expanded diameter through a working range.

3. The material capture system of claim 1, further comprising an expanding guide catheter.

4. The material capture system of claim 1, further comprising a funnel tip catheter.

5. The material capture system of claim 1, wherein the tubular body is configured to be retracted through a funnel opening of an expanding guide catheter.

6. The material capture system of claim 1, wherein a funnel tip and an expanding section of an expanding guide catheter are configured to facilitate thrombus retrieval.

7. The material capture system of claim 1, wherein the tubular body is configured to change the shape of the thrombus.

8. The material capture system of claim 1, wherein the tubular body is configured to change the size of the thrombus.

9. The material capture system of claim 1, wherein the tubular body is configured to reduce the fluid volume of the thrombus.

10. A method of using a clot capture system to redistribute a thrombus, comprising:

providing a tubular body comprising a first end and a second end, the first end having an opening, wherein the tubular body comprises a first configuration in which the first end is expanded and the tubular body has a first expanded axial length, wherein the second end is compressed in the first configuration, wherein the tubular body has a folded portion between the first end and the second end such that a compressed portion of the tubular body is within an expanded portion of the tubular body, wherein the tubular body surrounds a thrombus in the first configuration,

redistributing a thrombus by transforming the tubular body to a second configuration in which the tubular body has a second expanded axial length greater than the first expanded axial length, wherein the folded portion is moved away from the thrombus to create additional space within the expanded portion of the tubular body, and

transforming the tubular body to a third configuration in which the tubular body has a third expanded axial length less than the second expanded axial length.

11. The method of claim 10, wherein the tubular body is axially expanded, while still maintaining a constant or substantially constant radially expanded diameter through a working range.

12. The method of claim 10, further comprising retracting the tubular body through an expanding guide catheter.

13. The method of claim 10, further comprising retracting the tubular body through a funnel tip catheter.

14. The method of claim 10, further comprising retracting the tubular body through a funnel opening of an expanding guide catheter.

15. The method of claim 10, wherein the tubular body changes the shape of the thrombus.

16. The method of claim 10, wherein the tubular body changes the size of the thrombus.

17. The method of claim 10, wherein the tubular body reduces the fluid volume of the thrombus.

18. The method of claim 10, further comprising transforming the tubular body to a fourth configuration in which the tubular body has a fourth expanded axial length greater than the third expanded axial length, wherein the folded end is moved away from the thrombus to create additional space within the expanded portion of the tubular body, and transforming to a fifth configuration in which the tubular body has a fifth expanded axial length less than the fourth expanded axial length.

19. The method of claim 10, wherein the first end is retracted into a retrieval catheter before the folded portion.

20. The method of claim 10, wherein the first end is closer to a retrieval catheter than the folded portion in the first configuration.