Closed-loop infusion system, both method and apparatus, based on real time urine measurement
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United States of America Patent
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Sep 29, 1981
Issued Date -
N/A
app pub date -
Oct 9, 1979
filing date -
Oct 9, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A closed loop system for controlled infusion of fluids, medication or diagnostic substances into a patient based on real time measurement of urine output. Proper urine flow techniques and a self compensating drop count apparatus provide accurate representation as to cumulative number of drops and flow rate, with drop volume variations being compensated by a control algorithm which corrects computer parameters reflecting drop volume to correspond with urine volume measured. This real time urine flow rate is compared with a preset, desired flow rate to develop an error signal which is processed by a computer. Such processing includes modification by a PID control algorithm which governs infusion of fluids into the patient to effect the proper fluid resuscitation, medication or diagnostic treatment.
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