Apparatus for removing a blood clot from a vessel

• US 5,968,057 A
• Filed: 06/18/1997
• Issued: 10/19/1999
• Est. Priority Date: 06/18/1997
• Status: Expired due to Fees

• Current Assignee: Taheri, Syde A.
• Original Assignee: Taheri, Syde A.
• Inventors: Taheri, Syde A.
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US08/878,049
• Time in Patent Office: 853 Days
• Field of Search: 606/159, 606/127, 606/200
• US Class Current: 606/159
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/22032 having inflatable gripping elements balloon catheters A61M25/10
• 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 2017/2215 having an open distal end

Abstract

The present invention relates to an apparatus for removal of a clot from a blood vessel comprising, an embolectomy catheter, one or more sheath introducers disposed within the embolectomy catheter, two removal devices moveably engaged within the sheath introducers, and a balloon catheter with an inflatable/deflatable balloon. Each removal device has a flexible rod and a racquet shaped head integral therewith. Each head has an attached basket for retaining the clot. Each head also has a wire extending from its distal end to the proximal end of the flexible rod for manipulation of the head during capture of the clot.

The invention also relates to a method for removing a clot from a blood vessel comprising the steps of: pre-loading two removal devices; one into each of two sheath introducers; pre-loading the two sheath introducers into an embolectomy catheter; making an incision for insertion of a guide wire into the right jugular vein; inserting the guide wire into the right jugular vein under an image amplifier; passing the guide wire into the pulmonary artery; inserting the pre-loaded embolectomy catheter into the jugular vein and passing the catheter over the guide wire to a point within the pulmonary artery proximate the clot; pushing the removal devices through a distal opening of the two sheath introducers and further through a distal opening of the embolectomy catheter; moving the removal devices toward the clot; capturing the clot between the removal devices; withdrawing the removal devices and the clot into the embolectomy catheter; and removing the embolectomy catheter from the vessel.

Claims

1. An apparatus for removal of a clot from a blood vessel, which comprises:

a) a first removal device comprising a first rod supporting a first container having a closed surrounding side wall extending to an open end of the first container at a distal end of the first rod;

b) a second removal device comprising a second rod supporting a second container having a closed surrounding side wall extending to an open end of the second container at a distal end of the second rod, wherein the first container faces the second container, and wherein the first and second removal devices are disposed inside a first catheter having a lumen extending to a distal open end, and wherein the first and second removal devices are movable along the lumen of the first catheter to extend out the distal open end thereof;

c) a wire extending from at least one of the first and second removal devices, wherein the wire is capable of being manipulated to cause the container of at least one of the removal devices to move toward the container of the other removal device to thereby contain the clot in the containers of the first and second removal devices; and

d) a balloon catheter moveably disposed within the first catheter wherein the balloon catheter has an inflatable/deflatable balloon integral with a distal end of the balloon catheter having at least one lumen in fluid communication with the inflatable/deflatable balloon.

2. The apparatus of claim 1 wherein the first and second containers of the first and second removal devices each comprise a basket secured to an enclosing structure about an entire perimeter of the basket.

3. The apparatus of claim 2 wherein each of the enclosing structures of the first and second removal devices is substantially circular in shape.

4. The apparatus of claim 2 wherein the basket is of a screen material.

5. The apparatus of claim 2 wherein the first and second baskets are each dome-shaped members secured to an enclosing structure about an entire perimeter of the dome-shaped member to provide the first and second containers.

6. The apparatus of claim 5 wherein the dome-shaped member is of Dacron or polyurethane.

7. The apparatus of claim 1 wherein the wire is connected to a distal portion of the at least one of the first and second containers.

8. The apparatus of claim 1 wherein there is a wire connected to a distal portion of both the first and second containers.

9. The apparatus of claim 1 wherein the first rod and the second rod of the first and second removal devices are flexible.

10. The apparatus of claim 9 wherein the first and second removal devices are disposed inside respective first and second sheaths positioned inside the lumen of the first catheter.

11. The apparatus of claim 9 wherein the first catheter is flexible.

12. An apparatus for removal of a clot from a blood vessel, which comprises:

a) a first catheter having a central lumen extending to a distal open end thereof;

b) a first sheath disposed inside the first catheter, wherein the first sheath houses a first removal device movably disposed within a lumen of the first sheath and comprising a first rod supporting a first container having a closed surrounding side wall extending to an open end of the first container at a distal end of the first rod;

c) a second sheath disposed inside the first catheter, wherein the second sheath houses a second removal device movably disposed within a lumen of the second sheath and comprising a second rod supporting a second container having a closed surrounding side wall extending to an open end of the second container at a distal end of the second rod;

d) a wire extending from at least one of the first and second removal devices, wherein the wire is capable of being manipulated to cause the container of at least one of the removal devices to move toward the container of the other removal device to thereby contain the clot in the containers of the first and second removal devices; and

e) a balloon catheter movably disposed within the first catheter and supporting a balloon at a distal end thereof, wherein the balloon catheter is extendable out the distal open end of the first catheter and beyond the location of a clot to inflate the balloon and block the blood vessel and wherein the first and second removal devices are movable out of their respective sheaths to a position disposed on either side of the clot and wherein the wire is capable of being manipulated to cause the container of at least one of the removal devices to move toward the container of the other removal device to thereby contain the clot in the containers of the first and second removal devices.