Blood loss analyzer

Details Blood loss analyzer Blood loss analyzer

1982-01-26

1983-09-06

Hartary, Joseph W.

Weighing scales

Processes

128771, 177 15, 364416, G01G 1118

Patent

active

044023731

ABSTRACT:
An apparatus for measuring the true loss of blood from a patient during a surgical operation, comprises a blood container on a weighing means, that provides an output signal equal to the total weight on the weighing means. A weight register is maintained, to be updated periodically to the output of the weighing means. At scheduled periodic times the new weight reading of the weighing means is compared to the previous weight as indicated by the weight register. Any difference, if positive, indicates additional input to the blood container on the weighing means. This positive difference goes to update the weight register, and also to update a blood register indicating total blood loss. If the difference between the new electrical weight signal and the previous (old) electrical weight signal is negative, then an equal number of units is withdrawn from the weight register, to bring it into agreement with the new weight on the weighing means.

REFERENCES:
patent: 2707955 (1955-05-01), Borden
patent: 4294320 (1981-10-01), Bilstad
patent: 4295537 (1981-10-01), McAuinn

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