Prothrombin timer

Details Prothrombin timer Prothrombin timer

1971-06-25

1976-07-06

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

23259, 73 57, 73 59, 73 641, G01N 1110, G01N 3316

Patent

active

039679349

ABSTRACT:
A system and method is provided which has the general capabilities of measuring the speed of coagulation, congealing or solidification of a fluid sample, and which has particular utility in the measurement of the time required by a sample under test to increase viscosity to a particular level. The system and method to be described is predicated on a viscosity principle, and it includes a movable magnetic member suspended in the fluid sample and which changes position when the sample achieves a predetermined degree of viscosity. The change in position of the aforesaid member is photoelectrically or electromagnetically detected, and the time at which the change occurs, is used in the determination of the time required, for example, for the sample to form a fibrin clot, in a blood or plasma sample or to effect a particular reaction causing solidification or congealing of the sample.

REFERENCES:
patent: 2957338 (1960-10-01), Kennedy et al.
patent: 3267363 (1966-08-01), Young
patent: 3271112 (1966-09-01), Williams et al.
patent: 3375705 (1968-04-01), Kim
patent: 3443419 (1969-05-01), Guitroy et al.
patent: 3520659 (1970-07-01), Steinberg et al.

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