Pump monitor for photoactivation patient treatment system

Details Pump monitor for photoactivation patient treatment system Pump monitor for photoactivation patient treatment system

1984-10-29

1986-11-18

Skogquist, Harland S.

Surgery

Blood drawn and replaced or treated and returned to body

250231SE, A61M 103, G01D 534

Patent

active

046233288

ABSTRACT:
A preferred patient blood treatment system for the photoactivation of reagents in contact with a patient's blood employs an infusion pump for adding anti-coagulation reagent to the blood during extracorporeal operations. The infusion pump is preferably driven by a stepper motor and monitored by a periodic photo chopper employing a plurality of sensors. The spacing of the sensors and the spacing of the photo choppers work in concert to detect rotation of the stepper motor and to discriminate such from stutter or other characteristic nonrotational faults associated with stepper motors.

REFERENCES:
patent: 3814934 (1974-06-01), Mesh
patent: 3886354 (1975-05-01), Swiden
patent: 4398906 (1983-08-01), Edelson
patent: 4447191 (1984-05-01), Bilstad
patent: 4498983 (1985-02-01), Bilstad

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