Method for performing endarterectomy

• US 4,962,755 A
• Filed: 07/21/1989
• Issued: 10/16/1990
• Est. Priority Date: 07/21/1989
• Status: Expired due to Fees

• Current Assignee: Heart Tech of Minnesota Incorporated
• Original Assignee: Heart Tech of Minnesota Incorporated
• Inventors: King, Robert M., Dalquist, H. David
• Primary Examiner(s): Howell, Kyle L.
• Assistant Examiner(s): Pontius, Kevin
• Application Number:
  US07/382,918
• Time in Patent Office: 452 Days
• Field of Search: 128/24 AA, 128/24 AE, 604/22, 604/28, 606/127, 606/128
• US Class Current: 601/2
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• CPC Class Codes: A61B 2017/320078 Tissue manipulating surface
• CPC Class Codes: A61B 2017/320741 for stripping the intima or the internal plaque from a blood vessel, e.g. for endarterectomy
• CPC Class Codes: A61B 2217/007 with irrigation system
• CPC Class Codes: A61M 3/0279 Cannula; Nozzles; Tips; their connection means

Abstract

A method of performing an endarterectomy comprising the steps of exposing the blood vessel containing the atheroma to be excised, next forming an incision through the wall of the blood vessel at a location subtended by the atheroma, then inserting a probe through the incision and imparting ultrasonic vibrations to the probe while manipulating the probe relative to the atheroma to loosen the atheroma from the surrounding blood vessel and extracting the loosened atheroma through the incision. The further step of injecting a sterile liquid over the probe during its vibration has been found to enhance the ability of the probe to loosen the atheroma.

Claims

1. A method of removing atherosclerotic plaque deposits from the interior of a blood vessel comprising the steps of:

(a) surgically exposing the segment of said blood vessel containing said plaque deposits;

(b) forming an incision through the wall of the blood vessel at a location between the proximal and distal ends of said plaque deposit;

(c) introducing an ultrasonically vibrated hand-held probe through said incision;

(d) manipulating said probe relative to the interface between said plaque deposit and the involved wall of said blood vessel to free said plaque deposit from the blood vessel tissue;

(e) sequentially removing the portions of said plaque located proximally and distally of said incision intact through said incision; and

(f) closing said incision with sutures, or performing a distal bypass graft.

2. The method as in claim 1 and further including the step of injecting a sterile liquid about the distal end of said probe as said probe is being ultrasonically vibrated.

3. A method of removing atherosclerotic plaque deposits from the interior of a blood vessel comprising the steps of:

(a) surgically exposing the segment of said blood vessel containing said plaque deposits;

(b) forming an incision through the wall of the blood vessel at a location between the proximal and distal ends of said plaque deposit;

introducing an ultrasonically vibrated hand-held needle probe through said incision;

(d) manipulating said probe relative to the interface between said plaque deposit and the involved wall of said blood vessel to free said plaque deposit from the blood vessel tissue;

(e) sequentially removing the portions of said plaque located proximally and distally of said incision intact through said incision; and

(f) closing said incision with sutures, or performing a distal bypass graft.

4. A method of removing atherosclerotic plaque deposits from the interior of a blood vessel comprising the steps of:

(a) surgically exposing the segment of said blood vessel containing said plaque deposits;

(b) forming an incision through the wall of the blood vessel at a location between the proximal and distal ends of said plaque deposit;

(c) introducing an ultrasonically vibrated hand-held needle probe through said incision, said probe is bent at a predetermined obtuse angle;

(d) manipulating said probe relative to the interface between said plaque deposit and the involved wall of said blood vessel to free said plaque deposit from the blood vessel tissue;

(e) sequentially removing the portions of said plaque located proximally and distally of said incision intact through said incision; and

(f) closing said incision with sutures, or performing a distal bypass graft.

5. A method of removing atherosclerotic plaque deposits from the interior of a blood vessel comprising the steps of:

(a) surgically exposing the segment of said blood vessel containing said plaque deposits;

(b) forming an incision through the wall of the blood vessel at a location between the proximal and distal ends of said plaque deposit;

(c) introducing an ultrasonically vibrated hand-held probe having a spoon-shaped distal end through said incision;

(d) manipulation said probe relative to the interface between said plaque deposit and the involved wall of said blood vessel to free said plaque deposit from the blood vessel tissue;

(e) sequentially removing the portions of said plaque located proximally and distally of said incision intact through said incision; and

(f) closing said incision with sutures, or performing a distal bypass graft.

6. A method of removing atherosclerotic plaque deposits from the interior of a blood vessel comprising the steps of:

(a) surgically exposing the segment of said blood vessel containing said plaque deposits;

(b) forming an incision through the wall of the blood vessel at a location between the proximal and distal ends of said plaque deposit;

(c) introducing an ultrasonically vibrated hand-held probe having a spherical tip thereon through said incision;

(d) manipulating said probe relative to the interface between said plaque deposit and the involved wall of said blood vessel to free said plaque deposit from the blood vessel tissue;

(e) sequentially removing the portions of said plaque located proximally and distally of said incision intact through said incision; and

(f) closing said incision with sutures, or performing a distal bypass graft.

7. A method of removing atherosclerotic plaque deposits from the interior of a blood vessel comprising the steps of:

(a) surgically exposing the segment of said blood vessel containing said plaque deposits;

(b) forming an incision through the wall of the blood vessel at a location between the proximal and distal ends of said plaque deposits;

(c) introducing an ultrasonically vibrated hand-held probe through said incision where said probe includes an elongated shaft of generally circular cross-section with a proximal end and a distal end, said shaft being bent at a predetermined obtuse angle at a location intermediate said proximal and distal ends and terminating in a flattened and tapered segment;

(d) manipulating said probe relative to the interface between said plaque deposit and the involved wall of said blood vessel to free said plaque deposit from the blood vessel tissue;

(e) sequentially removing the portions of said plaque located proximally and distally of said incision intact through said incision; and

(f) closing said incision with sutures, or performing a distal bypass graft.