With the HOMOTH Rhino 4000-M rhinomanometry-module a measuring-method was evolved, allowing the adaptation via nose plugs and alternatively via a face mask. The method is used in the doctors practice as well as in clinics. All functions, data and diagrams are shown on the PC monitor. Herewith the results can be verified before documentation to avoid misprintings. The time-saving adaptation via nose-plugs allows a direct use at the doctors working-place, so the measurement fits into the normal examination. All calculation of flow, pressure, percentage and resistance-coefficient are done in realtime, so by the end of the measurement the complete results are present. Persons with bearts, long hair and children with fear of masks, can be measured without any problems. For clinical use a face-halfmask is available. During the measurement the intensity of breathing can be controlled via two measuring bars. The measurement is carried out anterior under the physiological conditions of self-breathing and allows a quantitatively objective statement about the resistance-status of the nose. Because of microprocessor controlling the use is very easy, so the measurement can be carried out by the medical personnel. The mean of max. five flow curves is calculated and shown in the diagram as flow-pressurecurves. Also the flow-values for a difference-pressure of 75 Pa, 150 Pa and 300 Pa are calculated and shown in the screen, together with the percentage of right- and left-side flow. For clinical use the coefficient of the resistance is calculated. All data and measured curves can be stored on harddisc, if the device is connectet to a PC.