OPTICAL SENSOR FOR DETECTING INFUSION PUMP CASSETTE
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United States of America Patent
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Issued Date -
Jul 23, 2015
app pub date -
Jan 23, 2014
filing date -
Jan 23, 2014
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Abstract
An infusion pump has an optical detection system for determining whether or not a cassette of an administration tubing set is properly loaded in the pump. Operation of the pump may be enabled or disabled based on a determination of the cassette detection system. The optical cassette detection system includes a light emitter directing a light beam along an optical axis to a corresponding light detector aligned on the optical axis. The cassette detection system also includes a tab carried by the cassette and arranged such that when the cassette is properly loaded in the pump, the tab intersects the optical axis and blocks at least a portion of the light beam from reaching the detector. The detector signal is evaluated by signal evaluation electronics to determine if the detector signal level is below a predetermined threshold, indicating presence of the cassette.
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