Medical infusion pump with closed loop stroke feedback system and method
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United States of America Patent
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Nov 20, 2012
Grant Date -
Sep 29, 2005
app pub date -
Mar 26, 2004
filing date -
Mar 26, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A medical pump with a closed loop stroke feedback system and method, for use with a pumping chamber, for example in a cassette, is disclosed. The pump includes a pumping element that intermittently pressurizes a pumping chamber during a pumping cycle. A pressure sensor detects the pressure exerted by the pumping element on the pumping chamber. A position sensor detects the position of the pumping element. A processing unit processes pressure data from the pressure sensor and position data from the position sensor to determine a calculated stroke volume of the pump for a pump cycle, and to adjust a stroke frequency of the pump to compensate for variation in the stroke volume.
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