Platelet aggregation monitoring device

Details Platelet aggregation monitoring device Platelet aggregation monitoring device

1975-01-22

1976-11-02

Corbin, John K.

Optics: measuring and testing

Blood analysis

23230B, 356206, G01N 3316, G01N 2114

Patent

active

039893820

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. 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 an optional filter circuit is provided for selectively filtering the difference signal.

REFERENCES:
patent: 3089382 (1963-05-01), Hecht et al.
patent: 3658480 (1972-04-01), Kane et al.
patent: 3711774 (1973-01-01), Bohler
patent: 3809482 (1974-05-01), Aslund et al.
patent: 3861877 (1975-01-01), Matharani et al.
patent: 3879135 (1975-04-01), Egli et al.

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