Sampling method in infusion pump apparatus

Details Sampling method in infusion pump apparatus Sampling method in infusion pump apparatus

1992-09-03

1994-09-06

Raevis, Robert

Measuring and testing

Gas content of a liquid or a solid

604123, G01N 700

Patent

active

053437349

ABSTRACT:
A sampling method for sampling an output emerging from a bubble detector used in an infusion device of a type including an resilient infusion tubing, a peristaltic pump including a plurality of juxtaposed finger members for sequentially squeezing a portion of the infusion tubing while producing at least one moving zone of occlusion along the infusion tubing for infusing a medical solution intravenouly, a stepper motor for driving the peristaltic pump. The sampling of an output from the bubble detector is carried out only during a first period from the timing at which a most upstream member of the finger members squeezes that portion of the infusion tubing to the timing at which a most downstream member of the finger members closest to the destination subsequently squeezes that portion of the infusion tubing, but not during a second period from the timing at which the most downstream finger member squeezes that portion of the infusion tubing to the timing at which the most upstream finger member squeezes that portion of the infusion tubing.

REFERENCES:
patent: 3566685 (1971-03-01), Zimmerman et al.
patent: 4255088 (1981-03-01), Newton et al.
patent: 4565500 (1986-01-01), Jeensalute et al.
patent: 4919650 (1990-04-01), Feingold et al.
patent: 4981467 (1991-01-01), Bobo, Jr. et al.

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