Method and apparatus to reduce injury to the vascular system

Details Method and apparatus to reduce injury to the vascular system Method and apparatus to reduce injury to the vascular system

1992-03-04

1995-04-25

Kamm, William E.

Surgery

Cardiac augmentation

Aortic balloon pumping

600 16, A61M 112

Patent

active

054094445

ABSTRACT:
An apparatus and method for reducing peak systolic blood pressure and the rate of change of velocity of the blood flow in a living being by passively absorbing a portion of the blood pressure during systole. The apparatus comprises an expandable/contractible chamber, e.g., a balloon, which is internally pressurized by a gas, e.g., carbon dioxide. The chamber has a surface portion which is moveable between first and second positions and vice versa when the chamber is contracted and expanded, respectively. The chamber is sufficiently small to be located at a desired situs, such as the aorta, so that the surface portion is subjected to blood pressure, whereupon it moves to the second position during systole to reduce the magnitude thereof while also reducing the rate of change of the velocity of the blood flow. The chamber expands so that the surface portion automatically returns to the first position to release an absorbed portion of the blood pressure during diastole, all the while maintaining average blood flow and pressure. A releasable anchoring mechanism is provided to hold the chamber in place within the patient's body.

REFERENCES:
patent: 3592183 (1971-07-01), Watkins
patent: 3818934 (1974-06-01), Borsanyi
patent: 4407271 (1983-10-01), Schiff
patent: 4535757 (1985-08-01), Webster, Jr.
patent: 4902273 (1990-02-01), Choy et al.
patent: 4957477 (1990-09-01), Lundback

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