Cardiac pumping device

Details Cardiac pumping device Cardiac pumping device

1977-01-18

1977-11-22

Frinks, Ronald L.

Surgery

Truss

Pad

128 1D, 128DIG3, 417412, 417521, 92 31, 74 57, A61F 124, A61M 103

Patent

active

040588556

ABSTRACT:
A pulsatile flow pumping unit adapted to serve as a total cardiac replacement device, a cardiac assist pump for orthotopic placement, for extracorporeal application in conjunction with a membrane oxygenator for cardiopulmonary support during surgery or critical illnesses, for pulsatile flow coronary artery perfusion, and for filling and emptying of an aortic diastolic augmentation balloon for cardiac assist is provided. The pumping unit features simplicity of construction, comparative economy and reliability by utilizing a minimum number of working parts including a large diameter slitted rotary driver and cam operated follower means which avoids close machining tolerances and attendant high cost of manufacturing. The device automatically adjusts its rate of pumping in accordance with both preload (filling pressure) and afterload (pulmonic and systemic pressure) and in addition modifies its stroke volume in a downward direction when confronted with high afterload. The automatic adjustment of the device during operation depending on several variables is accomplished without electronic control or monitoring.

REFERENCES:
patent: 2245457 (1941-06-01), Brassell
patent: 2361821 (1944-10-01), Crowe et al.
patent: 2815715 (1957-12-01), Tremblay
patent: 3379191 (1968-04-01), Harvey
patent: 3496878 (1970-02-01), Hargest et al.
patent: 3513486 (1970-05-01), Cotton De Bennetot et al.
patent: 3771173 (1973-11-01), Lamb
patent: 3860968 (1975-01-01), Shapiro

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