Computerized rhinomanometry with the practical software programmes is used widely as a research tool to evaluate objectively nasal air flow and resistance parameters, while the increase of its clinical application may be facilitated by further standardization of the method. The aim of the study was to determine the total nasal resistance normal values in healthy adult population using a method of computerized rhinomanometry. A randomized sample of 108 white healthy adults (216 nasal cavities), both sexs with a mean age of 32 (20-45) years comprised the test group. Nasal patency was measured by active anterior rhinomanometry in non-decongested mucosa ("at rest") during 10 repetitive measurements at inspiratory and expiratory reference pressure of 150 Pa. Nasal resistance was measured and calculated according to the recommendations of the Committee on objective assessment of the nasal airway, International Rhinologic Society. The mean total nasal resistance in the sample was found to be 0.179 Pa/cm3/s with the confidant interval from 0,167 to 0,191 Pa/cm3/s at the probability level of 95%. Total nasal resistance was very significantly influenced by sex (t = -4.614), height (F=11.625) and weight (F=11.529) of the examinees. This paper provides additional information on total nasal resistance normal values in healthy adult population important for computirezed rhinomanometry normative parameters standardization.
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