Electrical power amplifier for continuous cardiac output monitor

Details Electrical power amplifier for continuous cardiac output monitor Electrical power amplifier for continuous cardiac output monitor

1994-06-29

1997-06-10

Kamm, William E.

Surgery

Truss

Pad

128692, A61B 5029

Patent

active

056366388

ABSTRACT:
A continuous cardiac output monitor includes a general-purpose monitoring console with local display and communication facilities, and a module removably interfacing with the console to configure the latter for performing continuous cardiac output monitoring. The module includes a switch-mode high efficiency power amplifier for providing electrical heating power at a selected voltage, frequency, and wave form to a heating element of a continuous cardiac output monitoring catheter, which catheter at a distal end portion thereof is immersed in the blood flow of a patient. The catheter effects a temperature transient in the patient's blood flow by the controlled application of electrical resistance heating utilizing electrical power from the power amplifier, and this temperature transient is sensed and used to derive a value for the patient's cardiac output.

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Abstract FR 2511560 French patent Application published Feb. 18, 1983.
"Preamplifier with Digitally Controlled Automatic Offset Compensation Circuit for Physiological Applications" Ross and Hoke, Scand. Audiol. Suppl. 11, 1980 pp. 9-13.

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