Solution pumping for maximizing output while minimizing uneven pumping pressures
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United States of America Patent
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May 16, 1995
Issued Date -
N/A
app pub date -
Sep 8, 1994
filing date -
Dec 18, 1992
priority date (Note) -
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Abstract
A solution pumping system is disclosed which is embodied as a disposable pump cassette including a self-contained positive displacement pump, and an associated pump driver including a reciprocable pump piston for driving the pump of the cassette. This system is particularly suited for use in compounding in preparation of parenteral solutions for administration to patients. In order to promote high liquid output with minimum peak pumping pressures, the controls of the system operate to provide a 'square' pumping pressure waveform, thus optimizing performance of the system. This is achieved by selectively varying the velocity of the pump piston during its operation.
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