Abstract
Posterior and anterior rhinomanometry are supplementary tests. Posterior rhinomanometry is less sensitive to disturbances caused by distortion of the movable external pyramid of the nose, a common difficulty when testing Caucasians. The significance of posterior rhinomanometry is greatly limited by the fact that it can be applied in only 50–60% of people. Very rare discrepancies in the information obtained by anterior and posterior rhinomanometry confirm the value of the always applicable anterior rhinomanometry as a basic test. The frequent significant differences in the mean values of nasal pressure-drop or -rise by anterior and posterior technique nevertheless prove that these two different ways of measuring the nasal resistance are different tests and must be evaluated as such.