1. A method of estimating the respiratory impedance, the method comprising: connecting the device (4) with the breathing of the patient interface through the subject to create a pneumatic system that includes a patient interface device and the airway of the subject generating pressure fluctuations or flow volume of the gas in that the airway of the subject by the source (6) excitation, operatively connected to the patient interface device, the flow definition and the gas pressure in the pneumatic system to vyraba Pipeline corresponding time series representing the flow and the pressure (123) converting a corresponding time series in the time-frequency region (125) to generate the transformed time series estimate power flow and pressure from the transformed time series (127) estimate respective mutual spectra stream and pressure based on the converted time series, evaluating the respiratory impedance of the subject estimated power spectra and evaluated reciprocal (129, 131) and determining confidence limits on the estimated impedance (133) .2. A method according to claim 1, wherein the step of estimating the respiratory impedance of the subject estimated power and cross spectra (129, 131) comprises: determining the transfer function of the pressure waves to the flow and pressure respectively of the appropriate power and cross spectra (129) iotsenku respiratory impedance of the transmission functions and the flow of pressure (131) .3. A method according to claim 1 or 2, wherein the time-series of measurements for oboznachayutsyaisootvetstvenno flow and pressure, and a step of converting the corresponding time series in the time-frequency region (125)1. Способ оценки дыхательного импеданса, при этом способ содержит:соединение устройства (4) интерфейса пациента с дыхательным путем субъекта, чтобы создавать пневматическую систему, которая включает в себя устройство интерфейса пациента и дыхательный путь такого субъектагенерирование колебаний давления, потока или объема г
