Clot retrieval device for removing a clot from a blood vessel

Patent metadata

Field	Value
Publication number	US-2018344338-A1
Application number	US-201815997335-A
Country	US
Kind code	A1
Filing date	Jun 4, 2018
Priority date	Mar 9, 2011
Publication date	Dec 6, 2018
Grant date	—

Abstract

A device for removing a clot from a blood vessel. The device can have a collapsed delivery configuration and an expanded deployed configuration. The device can have a shaft. An outer expandable body can be included that is radially expandable from a first radially expanded state to a second radially expanded state in the deployed configuration. An inner body can be included, wherein the outer expandable body and the inner body are fixedly coupled to a distal region of the shaft, the outer expandable body radially surrounding at least a portion of the inner body in the second radially expanded state. A capture net can be coupled to a distal portion of the inner body and including a proximal mouth.

First claim

What is claimed is:

1 . A device for removing clot from a blood vessel, the device having a collapsed delivery configuration and an expanded deployed configuration and comprising:
a shaft; an outer expandable body radially expandable from a first radially expanded state to a second radially expanded state in the deployed configuration; an inner body, wherein the outer expandable body and the inner body are fixedly coupled to a distal region of the shaft, the outer expandable body radially surrounding at least a portion of the inner body in the second radially expanded state, and a capture net coupled to a distal portion of the inner body and including a proximal mouth, wherein in the first radially expanded state, the proximal mouth of the capture net is spaced a first axial distance away from the outer expandable body, and wherein in the second radially expanded state, the proximal mouth of the capture net is spaced a second axial distance, different than the first axial distance, away from the outer expandable body.

2 . The device of claim 1 , wherein the second axial distance is longer than the first axial distance.

3 . The device of claim 1 , wherein the inner body is cylindrical and tubular.

4 . The device of claim 1 , wherein a length of the outer expandable body in the first radially expanded state is longer than the length of the outer expandable body in the second radially expanded state.

5 . The device of claim 1 , wherein a proximal most end of the inner body coextensive with a proximal most end of the outer expandable body.

6 . The device of claim 1 , wherein the capture net is self-expandable.

7 . The device of claim 1 , wherein the inner body is an expandable inner body, and wherein the outer expandable body at least partially overlies the inner expandable body to provide a clot reception space radially between the inner expandable body and the outer expandable body.

8 . The device of claim 1 , wherein a distal end of the inner body and a distal end of the outer expandable body are uncoupled from one another.

9 . The device of claim 1 , wherein the outer expandable body includes a closed-cell strut structure having a first porosity, and the capture net has a second porosity less than the first porosity.

10 . A device for removing clot from a blood vessel, the device having a collapsed delivery configuration and an expanded deployed configuration and comprising:
a shaft having a proximal end and a distal end; an inner body fixedly coupled to the shaft; and an outer expandable body radially expandable from a first radially expanded state to a second radially expanded state in the deployed configuration; and a capture net including a proximal mouth, wherein in the first radially expanded state, the proximal mouth of the capture net is spaced a first axial distance away from the outer expandable body, and wherein in the second radially expanded state, the proximal mouth of the capture net is spaced a second axial distance, different than the first axial distance, away from the outer expandable body; wherein a proximal end of the inner body is fixed relative to a proximal end of the outer expandable body.

11 . The device of claim 10 , wherein the inner body is cylindrical and tubular.

12 . The device of claim 10 , further comprising a plurality of connecting arms extending from a distal most end of the inner body to a proximal end of the capture net.

13 . The device of claim 10 , wherein the outer expandable body includes a closed-cell strut structure having a first porosity, and the capture net has a second porosity less than the first porosity.

14 . A device for removing clot from a blood vessel, the device having a collapsed delivery configuration and an expanded deployed configuration and comprising:
a shaft; an expandable body coupled to the shaft and radially expandable to the deployed configuration, and having
an inner expandable body fixedly coupled to a distal region of the shaft, and
an outer expandable body fixedly coupled to the distal region of the shaft and having an open distal end, and
a capture net coupled to the inner expandable body and including a proximal mouth.

15 . The device of claim 14 , wherein the capture net is coupled to a distal most end of the inner expandable body via a plurality of connecting arms and is located distal the outer expandable body in the deployed configuration.

16 . The device of claim 14 , wherein, as the shaft radially expands, a length of the outer expandable body shortens.

17 . The device of claim 14 , wherein a proximal most end of the inner expandable body is in communication with a proximal most end of the outer expandable body.

18 . The device of claim 14 , wherein the outer expandable body is expandable to a radial extent which is greater than the radial extent of the inner expandable body in the deployed configuration to provide a clot reception space radially between the inner expandable body and the outer expandable body.

19 . The device of claim 14 , wherein the outer expandable body includes a closed-cell strut structure having a first porosity, and the capture net has a second porosity less than the first porosity.

20 . The device of claim 14 , wherein the inner expandable body is devoid of structure therein.

Assignees

• Neuravi Ltd

Inventors

• Brady Eamon
• Gilvarry Michael
• Razavi Mahmood K
• Vale David
• Griffin Patrick
• Casey Brendan
• Mcnamara Jason

Classifications

• A61B2017/00831

  Material properties · CPC title

• A61B2017/00477

  Coupling (A61B2017/0046 takes precedence) · CPC title

• A61B2017/00238

  Type of minimally invasive operation (A61B2017/00805 takes precedence) · CPC title

• A61B17/00234

  for minimally invasive surgery (A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence) · CPC title

• A61B2090/3966

  Radiopaque markers visible in an X-ray image · CPC title