Suction detection methods and devices
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United States of America Patent
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Jun 9, 2020
Grant Date -
Feb 1, 2018
app pub date -
Aug 1, 2017
filing date -
Aug 1, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A method of detecting a suction condition during operation of a rotary blood pump with an inlet connected to a ventricle of the heart of a patient, an outlet connected to an artery of the patient, a rotor, and a control circuit configured maintain the rotor at a set rotational speed. The method includes measuring the rotational speed of the rotor at a plurality of times during each of a plurality of speed measurement intervals. A speed range is determined between a minimum measured speed and a maximum measured speed during each of the plurality of speed measurement intervals. At least one additional parameter relating to the operation of the blood pump is derived. A suction detection signal is generated if both at least one determined speed range is above a speed range limit and the at least one additional parameter is indicative of a suction condition.
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