Infusion pump actuators, system and method for controlling medical fluid flowrate
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United States of America Patent
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Mar 20, 2012
Grant Date -
Sep 16, 2010
app pub date -
Mar 11, 2009
filing date -
Mar 11, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An infusion pump includes an actuator having an output shaft; a pump actuator having a length (lactuator) moved by the output shaft and in contact with tubing, such that the pump actuator at an output shaft actuated distance (x) creates flat contact areas with the tubing, and wherein remaining non-contact areas of the tubing are at least substantially circular in shape; and a logic implementer configured to use at least two relationships to solve for a same number of variables to calculate a cross-sectional area of the tubing at an output shaft actuated distance (x).
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