Infusion control apparatus

Details Infusion control apparatus Infusion control apparatus

1982-08-03

1985-04-09

Cohen, Lee S.

Surgery

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

Material introduced into and removed from body through...

128DIG13, 604 67, 7386141, A61M 516

Patent

active

045099430

ABSTRACT:
An infusion control apparatus senses drops of an infusion liquid by way of a variation in the quantity of light received from a light source after the light passes through a drop chamber. When drops of the liquid are not sensed over a predetermined period of time, a cut-off operation for closing off an infusion liquid flow passage starts and takes priority over other forms of control. When a drop-wise flow of the liquid is sensed during the cut-off operation, the flow passage closing action is interrupted and a transition is made to resume control wherein the liquid drop interval is computed from an input signal based on the variation in received light, and the liquid flow passage is adjusted so that the drop interval is made to approach a set value.

REFERENCES:
patent: 3890968 (1975-06-01), Pierce et al.
patent: 3990443 (1976-11-01), Fletcher
patent: 4018362 (1977-04-01), Ubaud
patent: 4037598 (1977-07-01), Georgi
patent: 4094318 (1978-06-01), Burke et al.

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