Microprocessor control of a ventricular volume servo-pump.

Abstract:

:Measurement of the instantaneous pressure-volume relationship of the left ventricle is fundamental to the study of ventricular mechanics. In order to effectively investigate this relationship, it is necessary to vary and control the time course of ventricular volume change in a variety of prescribed manners. In the past, we used an analog circuit to generate command signals for a servo-pump system which controlled ventricular volume. The use of analog control limited the variety of volume waveforms which could be generated. To overcome this limitation, we developed a new system in which the servo-pump is controlled by an inexpensive microprocessor based computer, capable of generating an unlimited repertoire of volume waveforms. The computer system also made possible the use of adaptive control to increase the system fidelity. Finally, such a system provides for ease of adjustment to new hardware, should future research require it.

journal_name

Ann Biomed Eng

authors

Sunagawa K,Lim KO,Burkhoff D,Sagawa K

doi

10.1007/BF02367387

subject

Has Abstract

pub_date

1982-01-01 00:00:00

pages

145-59

issue

4

eissn

0090-6964

issn

1573-9686

journal_volume

10

pub_type

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