CLOT ENGAGEMENT AND REMOVAL SYSTEM

• US 20130197567A1
• Filed: 10/21/2011
• Published: 08/01/2013
• Est. Priority Date: 10/22/2010
• Status: Active Grant

• Current Assignee: Neuravi Limited (Johnson & Johnson)
• Original Assignee: Neuravi Limited (Johnson & Johnson)
• Inventors: Brady, Eamon, Gilvarry, Michael, Razavi, Mahmood K., Vale, David
• Granted Patent: US 9,463,036 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• 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 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/22039 eccentric
• CPC Class Codes: A61B 2017/22094 for crossing total occlusions, i.e. piercing
• 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

Abstract

A clot retrieval apparatus 1 comprises a clot engaging device 2 and a capture basket 3. The clot engaging device 2 has a collapsed delivery configuration and an expanded deployment configuration. The clot engaging device has a proximal end and a distal end and an elongate body between the proximal end and the distal end. The capture basket 3 has a collapsed delivery configuration and an expanded deployment configuration. The capture basket 3 has a proximal mouth which is open when the capture basket 3 is in the deployment configuration. The clot engaging device 2 is axially movable relative to the capture basket for capture of a clot.

Claims

1. A clot retrieval apparatus comprising:

a clot engaging device and a capture basket;

the clot engaging device having a collapsed delivery configuration and an expanded deployment configuration, the clot engaging device having a proximal end and a distal end and an elongate body between the proximal end and the distal end, the clot engaging device being connected to a first elongate shaft element;

the capture basket having a collapsed delivery configuration and an expanded deployment configuration, the capture basket having a proximal mouth which is open when the capture basket is in the deployed configuration, the capture basket being connected to a second elongate shaft element; and

the shaft elements being movable relative to one another such that the clot engaging device is axially movable relative to the capture basket for capture of a clot.

2. A clot retrieval apparatus as claimed in claim 1 wherein at least the distal end of the clot engaging device is movable to enter the proximal mouth of the capture basket for capture of a clot.

3. A clot retrieval apparatus as claimed in claim 1 wherein the elongate body of the clot engaging device comprises a distal section, a proximal section and an intermediate section between the proximal and the distal sections.

4. A clot retrieval apparatus as claimed in claim 3 wherein, in the deployment configuration, the distal section of the clot engaging device has a diameter which is smaller than a diameter of the intermediate section.

5. A clot retrieval apparatus as claimed in claim 3 wherein, in the deployed configuration, the proximal section of the clot engaging device has a diameter which is smaller that a diameter of the intermediate section.

6. A clot retrieval apparatus as claimed in claim 3 wherein, in the deployed configuration, at least the intermediate section of the clot engaging device has a generally tubular shape.

7. A clot retrieval apparatus as claimed in claim 3 wherein the clot engaging device comprises a mesh.

8. A clot retrieval apparatus as claimed in claim 7 wherein the mesh comprises a plurality of struts.

9. A clot retrieval apparatus as claimed in claim 8 wherein at least some of the struts form closed cells.

10. A clot retrieval device as claimed in claim 1 wherein the clot engaging device defines a pathway for the second shaft element.

11. A clot retrieval apparatus as claimed in claim 1 wherein the capture basket comprises a net and a support frame for the capture net.

12. A clot retrieval apparatus as claimed in claim 11 wherein the support frame is connected to the second shaft element.

13. A clot retrieval apparatus as claimed in claim 11 comprising a control element which extends proximally from the support frame of the capture basket for operation by a user.

14. A clot retrieval apparatus as claimed in claim 13 wherein the control element comprises a tether for controlling the operation of the frame.

15. A clot retrieval method comprising the steps of:

providing a clot retrieval apparatus comprising an engaging device and a capture basket;

crossing a clot with a microcatheter;

advancing the clot retrieval apparatus through the microcatheter and across the clot;

deploying the capture basket distal of the clot;

deploying the clot engaging device within the clot at an initial deployment site;

retracting the clot engaging device and the capture basket together to a location proximal of the initial deployment site;

retracting the capture basket towards the clot engaging device to capture the clot therebetween; and

withdrawing the clot engaging device, the capture basket and the captured clot proximally.