Mixed venous oxygen saturation responsive system for and method

Details Mixed venous oxygen saturation responsive system for and method Mixed venous oxygen saturation responsive system for and method

1990-11-05

1992-06-09

Kamm, William E.

Surgery

Truss

Pad

128419PG, A61N 1365

Patent

active

051198134

ABSTRACT:
A system for and method of treating a malfunctioning heart is based on hemodynamics, the O.sub.2 in blood at a site in a patient's circulatory system being sensed. A signal is developed representative of short term O.sub.2 level in the blood preferably at a site which carries mixed venous blood. A signal representative of a baseline O.sub.2 level (fixed or varying) is provided and if the short term current O.sub.2 level differs therefrom by a predetermined value, an indication of possible hemodynamic compromise. The heart rate is sensed and signals develop indicative of which of a number of rate ranges into the current rate falls. One or another or more than one of a plurality or heart malfunction corrective inputs to the patient are delivered, as needed. The system may include a failsafe antibradycardia pacemaker, if desired.

REFERENCES:
patent: 4535774 (1985-08-01), Olson
patent: 4867161 (1989-09-01), Schaldach
patent: 4869252 (1989-09-01), Gilli
patent: 4870968 (1989-10-01), Wiertzfeld et al.
patent: 4940052 (1990-07-01), Mann et al.
patent: 4972834 (1990-11-01), Begemann et al.

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