MEASUREMENT OF RECIRCULATION BY MEANS OF TWO INTERIM SWITCHES HAVING KINETICALLY DIFFERENT DIFFUSION STATES
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United States of America
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Issued Date -
Mar 13, 2025
app pub date -
Jun 24, 2022
filing date -
Jun 24, 2022
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Abstract
A blood treatment machine, module device and recirculation determination method feature a dialyser. A sensor is connected downstream of the dialyser and connected to a control unit that determines recirculation without blood-side bolus administration. The control unit: acquires the signal of a variable of consumed dialysis liquid measured by the sensor; switches the machine from a base mode into an interim mode, in which a dialysis liquid amount is confined in the dialyser on the dialysis liquid membrane side while blood flows in the blood circuit; changes into the base mode to supply the previously confined dialysis liquid amount as a first or second dialysis liquid bolus to the sensor to measure a signal change relative to a base signal as a corresponding first or second bolus signal; and deduces a recirculation from a deviation of the second bolus signal compared to the first bolus signal.
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