Blood collecting apparatus

Details Blood collecting apparatus Blood collecting apparatus

1994-05-10

1995-04-04

Lewis, Ralph A.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604245, 604403, 128771, A61M 102, A61B 514

Patent

active

054032792

ABSTRACT:
A blood collecting apparatus includes a measuring device provided with a sensor for measuring the amount of collected blood when blood is collected into a blood container, and a controller for calculating the amount of collected blood based on an output y of the measuring sensor. The output y is a function of an n-times measured weight w of collected blood such that y=aw+b, wherein a and b are constants characteristic of the measuring sensor. The controller detects the output yi of the measuring sensor in n+1 units of respective known amounts wi of collected blood, and corrects the constants a and b on the basis of such detected data. The controller, moreover, automatically detects the output yO of the measuring sensor every predetermined cycle in a state where the measured weight w of collected blood is zero, and corrects the constant b of the function y=aw+b on the basis of such detected output yO.

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