SYSTEM FOR REMOVING A CLOT FROM A BLOOD VESSEL

• US 20150374479A1
• Filed: 04/28/2015
• Published: 12/31/2015
• Est. Priority Date: 06/30/2014
• Status: Active Grant

• Current Assignee: Neuravi Limited (Johnson & Johnson)
• Original Assignee: Neuravi Limited (Johnson & Johnson)
• Inventors: VALE, David
• Granted Patent: US 10,265,086 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 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/22079 with suction of debris
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• 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

Abstract

A system for removing obstructions from a blood vessel comprises a clot retrieval device and a catheter. The clot retrieval device comprises a clot engaging element attached to the distal end of an elongate shaft. The elongate shaft has a shaft proximal section, a shaft distal section and a shaft intermediate section between the shaft distal and proximal sections. The catheter has a catheter proximal section, a catheter distal section, and a catheter intermediate section between the proximal and distal sections. The maximum diameter of a shaft proximal section is greater than an inner distal lumen of the catheter distal section.

Claims

1. A system for removing obstructions from a blood vessel, the system comprising:

a clot retrieval device and a catheter;

the clot retrieval device comprising a clot engaging element and an elongate shaft;

the clot engaging element having a first collapsed delivery configuration and a second expanded deployed configuration;

the elongate shaft having a shaft proximal section, a shaft distal section and a shaft intermediate section between the shaft distal and proximal sections;

the clot engaging element being attached to the distal section of the elongate shaft;

the catheter having a catheter proximal section, a catheter distal section, and a catheter intermediate section between the proximal and distal sections;

the catheter proximal section having an inner proximal lumen and an outer proximal diameter, the catheter distal section having an inner distal lumen and an outer distal diameter;

wherein the maximum diameter of the shaft proximal section is greater than the inner distal lumen of the catheter distal section.

2. A system as claimed in claim 1 wherein the maximum diameter of the shaft proximal section is greater than the maximum diameter of the shaft distal section.

3. A system as claimed in claim 1 wherein the inner proximal lumen of the catheter is larger than the inner distal lumen of the catheter.

4. A system as claimed in claim 1 wherein the outer proximal diameter of the catheter is larger than the outer distal diameter of the catheter.

5. A system as claimed in claim 1 wherein the outer proximal diameter of the catheter is equal to the outer distal diameter of the catheter.

6. A system as claimed in claim 1 wherein the clot engaging element is self-expandable.

7. A system as claimed in claim 1 wherein the clot engaging element comprises a self-expanding nitinol body.

10. A method for removing obstructions from a blood vessel comprising:

providing a clot retrieval device and a catheter system as claimed in claim 1;

positioning a guide catheter or sheath proximal of an obstruction in a blood vessel;

advancing a guidewire towards the obstruction;

advancing the catheter over the guidewire;

removing the guidewire;

advancing the elongate clot retrieval shaft through the catheter with the clot retrieval element in the collapsed delivery configuration;

advancing the catheter and the shaft through the obstruction;

deploying the clot engaging element in the obstruction;

retracting the catheter to a position proximal of the clot retrieval element; and

retrieving the clot retrieval element and the clot captured by the retrieval element.

8. A system for removing obstructions from a blood vessel, the system comprising:

a clot retrieval device and a catheter;

the clot retrieval device comprising a clot engaging element and an elongate shaft;

the clot engaging element having a first collapsed delivery configuration and a second expanded deployed configuration;

the elongate shaft having a shaft proximal section, a shaft distal section and a shaft intermediate section between the shaft distal and proximal sections;

the clot engaging element being attached to the distal section of the elongate shaft;

the catheter having a catheter proximal section, a catheter distal section, and a catheter intermediate section between the proximal and distal sections;

the catheter proximal section having an inner proximal lumen and an outer proximal diameter, the catheter distal section having an inner distal lumen and an outer distal diameter;

the maximum diameter of the shaft proximal section being less than 0.003″

smaller than the inner distal lumen of the catheter distal section.

9. A system as claimed in claim 8 wherein the maximum diameter of the shaft proximal section is less than 0.002″

smaller than the inner distal lumen of the catheter distal section.

11. A method for removing obstructions from a blood vessel comprising:

providing a clot retrieval device and a catheter system as claimed in claim 8;

positioning a guide catheter or sheath proximal of an obstruction in a blood vessel;

advancing a guidewire towards the obstruction;

advancing the catheter over the guidewire;

removing the guidewire;

advancing the elongate clot retrieval shaft through the catheter with the clot retrieval element in the collapsed delivery configuration;

advancing the catheter and the shaft through the obstruction;

deploying the clot engaging element in the obstruction;

retracting the catheter to a position proximal of the clot retrieval element; and

retrieving the clot retrieval element and the clot captured by the retrieval element.