Monitor for biological volume changes

Details Monitor for biological volume changes Monitor for biological volume changes

1976-02-09

1977-11-22

Michell, Robert W.

Surgery

Truss

Perineal

128 21Z, 73194E, 328127, A61B 502

Patent

active

040591697

ABSTRACT:
A monitor for biological volume changes such as fluid content changes includes a source of constant current oscillations for application to the biological volume, and a receiver adapted to be coupled to the biological volume for producing a direct voltage having an amplitude corresponding to the impedance of the biological volume. A display device provides a display responsive to the D.C. voltage. A filter is provided for filtering the voltage, the filter having a time constant up to 15 seconds.

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Peiss et al., "An Integrating Drop-Flowmeter . . . Recording", IRE Trans. on Med. Elec., Dec., 1959, pp. 234-237.
Moffitt, "A Versatile . . . Plethysmograph", ISA, 1972, vol. 9, pp. 15-20.

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