Method and apparatus for metered infusion of fluids
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United States of America Patent
Stats
-
Jul 14, 1981
Grant Date -
N/A
app pub date -
Dec 13, 1979
filing date -
Dec 13, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Metering apparatus for metering the flow of fluid through an administration set includes a peristaltic-type metering pump which repeatedly and progressively compresses a section of vinyl tubing of the administration set to provide a desired flow rate. For improved metering accuracy the fluid is maintained under pressure upline and downline of the metering pump to assist the tubing in becoming fully restored following each compression by the pump. In the illustrated embodiment, upline pressure is provided by a peristaltic-type pressure pump which is operated at a controlled rate to maintain a predetermined upline pressure, and downline pressure is provided by a spring-biased plunger which bears against the tubing downline of the metering pump to partially occlude the tubing.
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