APPARATUSES AND METHODS FOR PAUSING AN INFUSION PUMP DURING A DISPENSE STROKE TO IMPROVE OCCLUSION SENSING
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United States of America Patent
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Issued Date -
Jan 18, 2024
app pub date -
Dec 9, 2021
filing date -
Dec 15, 2020
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Abstract
Devices and methods detect and mitigate pre-occlusion leak pressures within a dispense stroke of an infusion device. An infusion pump obtains pump measurements indicative of pressure, and controls its pump mechanism to pause when the pump measurements satisfy a pre-occlusion pressure threshold. Additional pump measurements are obtained during the pause and pressure-related conditions can abate during the pause. The dispense stroke is resumed by the infusion pump when the pump measurements no longer satisfy pre-occlusion pressure criteria, and can be paused again. The number and frequency of pauses, analysis of pump measurements, and resumption of a dispense stroke can be predetermined, or dynamically determined. Pauses can also be preset regardless of current pressure conditions. Pausing the pump to increase the samples or sampling rate of a measured parameter indicative of pressure (e.g., pump motor current) provides a much higher resolution for detecting an occlusion.
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