CLOT RETRIEVAL SYSTEM FOR REMOVING OCCLUSIVE CLOT FROM A BLOOD VESSEL

• US 20150257775A1
• Filed: 03/11/2015
• Published: 09/17/2015
• Est. Priority Date: 03/11/2014
• Status: Active Grant

• Current Assignee: Neuravi Limited (Johnson & Johnson)
• Original Assignee: Neuravi Limited (Johnson & Johnson)
• Inventors: GILVARRY, Michael, VALE, David, CASEY, Brendan, McARDLE, Kevin, O'GORMAN, Jacqueline
• Granted Patent: US 10,285,720 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61M 2025/0042 Microcatheters, cannula or the like having outside diameters around 1 mm or less
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 2039/1077 Adapters, e.g. couplings adapting a connector to one or several other connectors

Abstract

A clot retrieval device comprising an elongate shaft having a proximal end and a distal end and a clot retrieval element at the distal end of the elongate shaft. A proximal end of the elongate shaft of the clot retrieval device is adapted for retraction of a first catheter over the clot retrieval device elongate shaft. A second catheter is advanced to or adjacent to the distal end of the clot retrieval device shaft to enable enhanced aspiration adjacent to the clot retrieval element.

Claims

1. A clot retrieval device comprising:

—

an elongate shaft having a proximal end and a distal end; and

a clot retrieval element at the distal end of the elongate shaft,

a proximal end of the elongate shaft of the clot retrieval device being adapted for retraction of a first catheter over said clot retrieval device elongate shaft, a second catheter being advanced to or adjacent to the distal end of the clot retrieval device shaft to enable enhanced aspiration adjacent to the clot retrieval element.

2. The clot retrieval device as claimed in claim 1 wherein aspiration is delivered through the second catheter, the lumen of the second catheter being larger than the lumen of the first catheter.

3. The clot retrieval device as claimed in claim 2 wherein the first catheter comprises a microcatheter through which the clot retrieval device is delivered.

4. The clot retrieval device as claimed in claim 1 wherein the second catheter is an intermediate catheter.

5. The clot retrieval device as claimed in claim 1 wherein the proximal end of the clot retrieval device shaft is adapted for retraction of a first catheter having a lumen and subsequent advancement of a second catheter having a lumen.

6. The clot retrieval device as claimed in claim 5 wherein the lumen of the second catheter is larger than the lumen of the first catheter.

7. The clot retrieval device as claimed in claim 1 wherein the proximal end of the shaft is adapted for retraction and removal of a first catheter having a lumen through the second catheter.

8. The clot retrieval device as claimed in claim 1 comprising an adaptor at the proximal end of the elongate shaft of the clot retrieval device, the adaptor being adapted to receive a shaft extension section.

9. The clot retrieval device as claimed in claim 8 wherein the adaptor is integral with the clot retrieval device shaft proximal section.

10. The clot retrieval device as claimed in claim 9 wherein the adaptor comprises a receiver which is adapted to receive a shaft extension section.

11. The clot retrieval device as claimed in claim 8 wherein the adaptor is releasably mountable to the proximal end of the elongate shaft.

12. The clot retrieval device as claimed in claim 11 wherein the adaptor comprises a mounting section for mounting to the proximal end of the shaft and a receiver which is adapted to receive a shaft extension section.

13. The clot retrieval device as claimed in claim 12 wherein the adaptor mounting section is a push fit with the proximal end of the shaft.

14. The clot retrieval device as claimed in claim 12 wherein the adaptor receiver is a push fit with a shaft extension.

15. The clot retrieval device as claimed in claim 9 wherein the adaptor is configured to accept the proximal end of a standard guide wire.

16. A clot retrieval system comprising a clot retrieval device as claimed in claim 1 and an adaptor for mounting to a proximal end of the elongate shaft of the clot retrieval device.

17. The clot retrieval system as claimed in claim 16 wherein the adaptor comprises a mounting section for mounting to the proximal end of the clot retrieval device shaft and a receiver which is adapted to receive a shaft extension section.

18. The clot retrieval system as claimed in claim 17 wherein the adaptor mounting section is a push fit with the proximal end of the clot retrieval shaft.

19. The clot retrieval system as claimed in claim 17 wherein the adaptor receiver is a push fit with a shaft extension.

20. The clot retrieval system as claimed in claim 17 wherein the adaptor is configured to accept the proximal end of a standard guidewire.

21. The clot retrieval device as claimed in claim 1 wherein the clot retrieval device shaft has at least one tactile feature at/or adjacent to the proximal end thereof.

22. The clot retrieval device as claimed in claim 1 wherein the clot retrieval device shaft has at least one high friction feature at/or adjacent to the proximal end thereof.

23. The clot retrieval device as claimed in claim 1 wherein the shaft of the clot retrieval device is extendable.

24. The clot retrieval system as claimed in claim 23 wherein the proximal region of the device shaft is tubular and a shaft extension member is movable from a retrieval configuration in which the extension member is within the proximal region to an extended configuration in which the extension member is at least partially extended proximally from the proximal region of the device shaft.

25. The clot retrieval system as claimed in claim 24 wherein the tubular proximal region and/or the extension member comprises at least one stop to set the length to which the extension member may extend from the tubular proximal region and/or to control the degree of push that may be applied to the extension member.

26. A method for retrieving a clot from a vasculature comprising the steps of:

—

providing a clot retrieval device having a compressed or retracted delivery configuration and an expanded deployed configuration, the clot retrieval device having an elongate shaft;

providing a first catheter;

providing a second catheter;

deploying the clot retrieval device at/or adjacent to a clot; and

retracting the first catheter over the clot retrieval device shaft whilst maintaining control of the proximal end of the retrieval device shaft.

27. The method as claimed in claim 26 comprising applying aspiration to the clot through the lumen of the second catheter after retraction of the first catheter over the retrieval device shaft.

28. The method as claimed in claim 27 wherein the first catheter is a delivery catheter for the clot retrieval device and the method comprises deploying the retrieval device from the delivery catheter and subsequently retracting the delivery catheter over the clot retrieval device shaft.

29. The method as claimed in claim 26 comprising the step of extending the length of the retrieval device shaft prior to retraction of the first catheter.

30. The method as claimed in claim 29 comprising the steps of connecting one end of an adaptor to the proximal end of the device shaft and connecting a proximal shaft extension to the other end of the adaptor.

31. The method as claimed in claim 29 wherein the device shaft comprises an extension member and the method compresses the steps of moving the extension member from a retracted to an extended configuration prior to retraction of the first catheter.

32. The method as claimed in claim 28 comprising the step of extending the length of the clot retrieval device shaft and delivering the second catheter over the extended length of the device shaft and distally towards the clot.