Method and apparatus for the creation of tricuspid regurgitation

• US 5,509,428 A
• Filed: 05/31/1994
• Issued: 04/23/1996
• Est. Priority Date: 05/31/1994
• Status: Expired due to Term

• Current Assignee: Richard W. Dunlop
• Original Assignee: Richard W. Dunlop
• Inventors: Dunlop, Richard W.
• Primary Examiner(s): Sykes, Angela D.
• Assistant Examiner(s): GILBERT, SAMUEL G
• Application Number:
  US08/251,109
• Time in Patent Office: 693 Days
• Field of Search: 128/897, 128/898, 128/642, 600/15, 604/264, 604/280, 606/191, 606/192, 606/194, 606/200, 607/119, 607/122, 607/123, 607/126
• US Class Current: 128/898
• CPC Class Codes: A61B 2017/22097 Valve removal in veins
• CPC Class Codes: A61F 2/24 Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

A method and apparatus for the controlled inducement of tricuspid regurgitation for the purpose of treating congestive heart failure. The apparatus is comprised of a catheter onto which is affixed an expandable device. The catheter is percutaneously inserted into the patient'"'"'s body, then moved within the central venous system until the end of the catheter traverses the tricuspid valve of the heart. The expandable device on the distal end of the catheter is then radially expanded to hold open the leaflets of the tricuspid valve. Tricuspid regurgitation, the backflow of blood from the right ventricle to the right atrium, then occurs. The intention of causing the regurgitation is to lower the pulmonary arterial pressure elevated as a result of congestive heart failure. Through careful monitoring of the patient'"'"'s pulmonary arterial pressures and cardiac output, the degree of tricuspid regurgitation can be adjusted. The controls for the expansion of the catheter are outside of the body and in reach of the skilled physician.

Claims

1. A method of treating a patient'"'"'s congestive heart failure, a condition resulting in elevation of the pulmonary arterial pressures, comprising:

selecting a catheter comprising an elongated hollow body onto which or through which is affixed a radially expandable device which can be controlled from outside the patient'"'"'s body;

inserting the catheter into a patient'"'"'s venous system;

advancing the catheter through the patient'"'"'s venous system into a patient'"'"'s heart area so as to position the radially expandable device of the catheter across a tricuspid valve;

radially expanding the radially expandable device of the catheter, through manipulation of controls located outside the patient'"'"'s body, so that the catheter holds open leaflets of the tricuspid valve;

inducing tricuspid regurgitation by the holding open of said leaflets of the tricuspid valve;

monitoring the patient'"'"'s pulmonary pressures and cardiac output;

adjusting, as desired, the degree of tricuspid regurgitation to affect improvement in a patient'"'"'s condition; and

removing the catheter from the patient'"'"'s body.

2. The method according to claim 1, wherein:

the step of radially expanding the radially expandable device of the catheter comprises expanding an expandable mesh cage.

3. The method according to claim 1, wherein:

the step of radially expanding the radially expandable device of the catheter comprises expanding an inflatable irregularly shaped balloon, which, when inflated, is adapted to

allow blood to reflux back past the balloon while the balloon holds open the leaflets of the tricuspid valve.

4. The method according to claim 1, wherein:

the step of radially expanding the radially expandable device comprises expanding an expandable coil.