1977-08-23
1979-07-31
Frinks, Ronald L.
Surgery
Truss
Pad
128 1D, A61F 124, A61M 103
Patent
active
041625439
ABSTRACT:
An artificial heart comprising at least one blood circulating pump having a transparent housing divided into two chambers by a diaphragm. One of the chambers is a hydraulic chamber having an inlet valve and an outlet valve which are connected to the circulatory system; the other chamber is a pneumatic chamber provided with a nipple for the intake and discharge of gas. The pump's pneumatic chamber has a transparent conductive coating, for example, of gold, applied onto the internal wall of said pneumatic chamber. Said coating and the surface of the blood circulating in the hydraulic chamber make up a capacitor whose capacity varies due to changes in the volume of the hydraulic chamber. Said capacitor serves as a blood volume transducer. The artificial heart includes a system for controlling the supply of gas to and the discharge of gas from the pneumatic chamber of said pump. The control system comprises an element which is sensitive to variations in the blood volume. Said sensitive element is an RC bridge. Said blood volume transducer is connected in one of the arms of said bridge. A blood volume indicator is connected to the output of the sensitive element.
REFERENCES:
patent: 3491377 (1970-01-01), Bolie
patent: 3783453 (1974-01-01), Bolie
patent: 3966358 (1976-06-01), Heimes et al.
patent: 3974825 (1976-08-01), Normann
"Servomechanism to Drive an Artificial Heart Inside the Chest", by K. W. Hiller et al., Transactions American Society for Artificial Internal Organs, vol. XIII, 1962, pp. 125-130.
"An Electronic-Mechanical Control for an Intrathoracic Heart", by K. W. Hiller et al., American Journal of Medical Electronics, Jul.-Sep. 1963, pp. 212-221.
"Development of an Artificial Intrathoracic Heart", by C. K. Kirby et al., Surgery, vol. 56, No. 4, Oct. 1964, pp. 719-725.
Burynin Vitaly A.
Lokshin Moisei A.
Novikov Nikolai V.
Shumakov Valery I.
Vlasov Vadim V.
Frinks Ronald L.
Institut Transplantatsii Organov I Tkanei
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