Clot capture systems and associated methods

Patent metadata

Field	Value
Publication number	US-11529157-B2
Application number	US-201916664671-A
Country	US
Kind code	B2
Filing date	Oct 25, 2019
Priority date	Jul 22, 2008
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

A clot capture device for restoring blood flow to a vessel occluded by a clot including a plurality of struts formed by interconnected fibers terminating in a distal end. An open proximal end includes a clot capture space larger than the distal end. The device includes an expanded deployed configuration and a retracted delivery configuration whereby the device is advanceable through a microcatheter across the clot, and the device is configured such that upon deployment the device is deployed distal to the clot and then withdrawn to remove the clot from the vessel.

First claim

What is claimed is:

1. A clot capture device for restoring blood flow to a vessel occluded by a clot, comprising:
a net formed from a single fiber, the net forming a plurality of struts connected to a distal collar at a distal end wherein the struts are interconnected forming closed loops without rigidly fixing the struts at cross over points such that the closed loops are slidable relative to one another allowing the device to change its shape in response to the clot being irregularly shaped;
an open proximal end comprising a clot capture space larger than the distal end;
wherein the device comprises an expanded deployed configuration and a retracted delivery configuration whereby the device is advanceable through a microcatheter across the clot, and the device is configured to be deployed distal to the clot and then configured to be withdrawn to remove the clot from the vessel.

2. The device of claim 1 , wherein the struts are interconnected forming closed cells smaller than the open proximal end.

3. The device of claim 1 , wherein the distal end is closed.

4. The device of claim 1 , wherein the struts form a mesh for capturing the clot.

5. The device of claim 1 , further comprising:
a frame positioned at the proximal end with a collar;
a guidewire slideably positioned through the collar for translating the device distally and proximally.

6. The device of claim 5 , wherein the frame is axially aligned with an axis of the guidewire.

7. The device of claim 5 , wherein the frame is aligned offset from an axis of the guidewire.

8. The device of claim 5 , further comprising a the distal collar disposed at the distal end of the clot capture device through which the guidewire is slideably positioned.

9. The device of claim 5 , wherein a distal end of the guidewire is disposed distal of the distal end of the device.

10. A method, including:
delivering a microcatheter to a site of a clot in a blood vessel;
positioning a clot capture device in a lumen of the microcatheter, the device comprising:
a net formed from a single fiber, the net forming a plurality of struts connected to a distal collar at a distal end wherein the plurality of struts are interconnected forming closed loops without rigidly fixing the struts at cross over points such that the closed loops are slidable relative to one another allowing the device to change its shape in response to the clot being irregularly shaped;
an open proximal end comprising a clot capture space larger than the distal end, the device comprising an expanded deployed configuration and a retracted delivery configuration in the microcatheter,

distally advancing the microcatheter and the clot capture device across the clot;
proximally translating the microcatheter while leaving the clot capture device distal of the clot thereby causing the device to deploy into the expanded deployed configuration;
proximally translating the clot capture device to capture the clot and draw the clot and the clot capture device into the microcatheter.

11. The method of claim 10 , further comprising:
interconnecting the struts to form closed cells smaller than the open proximal end.

12. The method of claim 10 , further comprising:
forming a clot capturing mesh with the struts.

13. The method of claim 10 , further comprising:
positioning a frame at the proximal end with a collar;
slideably positioning a guidewire through the collar for translating the device distally and proximally.

14. The method of claim 13 , further comprising:
positioning a the distal collar at the distal end of the clot capture device; and
distally translating the guidewire through the distal collar.

15. The method of claim 13 , further comprising:
distally translating the guidewire until a distal end of the guidewire is disposed distal of the distal end of the device.

16. The method of claim 13 , further comprising:
axially aligning the frame with an axis of the guidewire.

17. The method of claim 10 , wherein the step of deploying the device into the expanded deployed configuration comprises projecting radially the struts between the proximal and distal ends of device with the proximal end defining a maximum radial size of a frame of the device.

18. The method of claim 10 , further comprising: dislodging the clot with the proximal end of the device.

Assignees

• Neuravi Ltd

Inventors

• Brady Eamon
• Vale David
• Gilvarry Michael
• Razavi Mahmood
• O'Shaughnessy John

Classifications

• A61B2017/2212

  having a closed distal end, e.g. a loop · CPC title

• A61F2230/0008

  elliptical or oval · CPC title

• A61F2230/0006

  circular · CPC title

• A61F2/013

  Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting · CPC title

• A61F2230/0058

  X-shaped · CPC title