Fluid flow monitoring method and system
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United States of America Patent
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May 10, 1988
Grant Date -
N/A
app pub date -
Aug 18, 1986
filing date -
Aug 18, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention is directed to a fluid flow monitoring method and system for parenteral fluid delivery systems for use in situations, such as with sedentary patients, when wide pressure variations are not expected. The resistance of the fluid delivery system is determined from the ratio of pressure differences at high and low fluid flow rates to differences in the high and low fluid flow rates. The resistance is used to develop a pressure limit from the sum of the pressure at low fluid flow rates and the product of the resistance and the high fluid flow rate. The pressure limit is compared with the pressure monitored and if the pressure monitored exceeds the calculated pressure limit, an alarm is actuated to warn medical personnel of an occlusion or other fluid flow fault. Additionally, if the noise level (pressure) excess predetermined limits during the periods of low and high fluid flow, the pressure monitoring is terminated.
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