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[Definition and clinical significance of oscillation parameters (fixed frequency technic)].

Starting from the polyvalent sense of a limitation of the maximum available respiratory flow there is to be pointed to the necessity of the decentralized measurement of resistance. The instrument IfM E1 permits the use of the simple forced oscillation technique for estimations of ROS and the derived values delta ROS and STAV all over the country. The advanced forced oscillation method, based on the fixed frequency technique, contained the option for estimation of the residual volume and especially the phase-angle. The knowledge of psi, Re and phi can make the oscillatory testing of airways resistance more surely. Taking into consideration the dependence of the phase signal on lung volume can state noninvasive different facts about the compliance of the lung-thoracic-diaphragm system.