Platelet aggregation monitoring device

Details Platelet aggregation monitoring device Platelet aggregation monitoring device

1976-07-09

1979-01-23

Corbin, John K.

Optics: measuring and testing

Blood analysis

346 62, 356427, G01N 3316, G01N 2124, G01D 908

Patent

active

041358180

ABSTRACT:
A difference amplifier continuously generates a signal representing the difference between the optical densities of a platelet rich and a platelet poor sample of blood plasma. If this signal lies within a predetermined range, a variable gain amplifier multiplies the difference signal by a factor which is proportional to the initial difference signal. Electronic circuitry automatically determines the multiplying factor by comparing the initial difference signal to a predetermined magnitude. The multiplied difference signal is continuously recorded on a chart recorder and is displayed as a percentage of aggregation on a digital display. An optional filter circuit is provided for selectively filtering the difference signal.

REFERENCES:
patent: 3548206 (1970-12-01), Ogle et al.
patent: 3836333 (1974-09-01), Mintz
patent: 3861877 (1975-01-01), Matharani et al.
patent: 3905769 (1975-09-01), Carroll et al.
patent: 3965477 (1976-06-01), Hambleton et al.
patent: 3989382 (1976-11-01), Kent et al.

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