Method and device for controlling a respirator for therapeutic treatment of sleep apnea
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United States of America Patent
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Mar 16, 1999
Grant Date -
N/A
app pub date -
Jul 30, 1997
filing date -
Jul 30, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of controlling a respirator for therapeutic treatment of sleep aa includes the step of continuously measuring a) a phase angle of a time difference between respiratory flow and respiratory pressure of a patient and b) a pressure amplitude of the patient. The individual respiratory resistance is determined based on the measured pressure amplitude by oscilloresistometry. The respiratory gas pressure is controlled based on the phase angle, the pressure amplitude, and the respiratory resistance. Significant changes of the phase angle are filtered from the signal of the phase angle. A control signal is produced based on the significant changes for controlling the respiratory gas pressure.
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