Method of using neovascularization catheter

• US 6,296,651 B1
• Filed: 03/07/2000
• Issued: 10/02/2001
• Est. Priority Date: 10/03/1996
• Status: Expired due to Term

• Current Assignee: Lary Research & Development LLC
• Original Assignee: Interventional Technologies Incorporated (Boston Scientific Corporation)
• Inventors: Radisch, Herbert R. Jr., Lary, Banning Gray
• Primary Examiner(s): Schaetzle, Kennedy
• Assistant Examiner(s): DROESCH, KRISTEN L
• Application Number:
  US09/520,070
• Time in Patent Office: 574 Days
• Field of Search: 606/170-171, 606/159, 606/1, 606/7, 606/167, 606/185, 606/108, 606/198, 608/96-104, 604/264, 128/898
• US Class Current: 606/170
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 17/3207 Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 17/320783 through side-hole, e.g. sliding or rotating cutter inside catheter
• CPC Class Codes: A61B 2017/00247 Making holes in the wall of the heart, e.g. laser Myocardial revascularization
• CPC Class Codes: A61B 2017/00252 for by-pass connections, i.e. connections from heart chamber to blood vessel or from blood vessel to blood vessel
• CPC Class Codes: A61B 2017/22044 with a pointed tip
• CPC Class Codes: A61B 2017/22069 Immobilising; Stabilising
• CPC Class Codes: A61B 2017/22072 with an instrument channel, e.g. for replacing one instrument by the other
• CPC Class Codes: A61B 2018/00392 Transmyocardial revascularisation

Abstract

The present invention is a device and a method for boring a perfusion channel from a coronary artery into a cardiac muscle of a patient. Structurally, the present invention includes a positioning catheter, anchor means and a cutting catheter. The cutting catheter includes a plurality of blades and is advanceable through a deployment lumen of the positioning catheter. Advancement of the cutting catheter through the deployment lumen causes a distal end of the cutting catheter to project laterally from the positioning catheter. In use, the positioning catheter is positioned within the coronary artery. The anchor means is then expanded to anchor the positioning catheter within the artery. The cutting catheter is then advanced through the deployment lumen to bore one or more perfusion channels in the myocardial tissue.

Claims

1. A method for treating a deficiency of blood flow from a coronary artery to a cardiac muscle, the method comprising the steps of:

advancing a positioning catheter into the coronary artery;

anchoring a portion of the positioning catheter in the coronary artery;

advancing a cutting guidewire into the cardiac muscle; and

creating a perfusion channel with a cutting catheter which extends away from the positioning catheter, the perfusion channel extending from the artery into only a portion of the cardiac muscle, the perfusion channel allowing blood flow from the coronary artery to the cardiac muscle.

2. The method of claim 1 wherein the step of creating a perfusion channel includes creating a perfusion channel having a diameter of between approximately two millimeters and three millimeters.

3. The method of claim 1 wherein the step of creating a perfusion channel includes creating a perfusion channel at an angle of between approximately twenty degrees and eighty degrees relative to a center-line of the positioning catheter proximate where the cutting catheter extends away from the positioning catheter.

4. The method of claim 1 including the step of releasing a medication from the cutting guidewire into the cardiac muscle.

5. The method of claim 1 including the step of releasing a contrast medium from the cutting guidewire into the cardiac muscle to determine the location of the guidewire.

6. The method of claim 4 including the step of determining the location of a cutting guidewire tip of the cutting guidewire by measuring the pressure at a cutting guidewire tip to determine the location of a cutting guidewire tip of the cutting guidewire.

7. The method of claim 1 wherein the step of creating a perfusion channel includes utilizing a cutting catheter having a plurality of spaced apart blades which extend substantially radially from a cutting catheter body of the cutting catheter.

8. The method of claim 1 including the step of creating a second perfusion channel extending from the coronary artery into only a portion of the cardiac muscle.

9. The method of claim 8 wherein the step of creating a second perfusion channel includes creating a second perfusion channel having a diameter of between approximately two millimeters and three millimeters.