Abstract
The effects of nasal secretion on resistance values were tested in 100 subjects. Active anterior rhinomanometry using adhesive tape technique was applied to one group before and after the subjects blew their noses. The same method was applied to the other group before and after the secretion in the nasal cavities was cleansed by aspiration.Values of nasal resistance did not differ significantly before and after removal of the secretion in normal sublects. The nasal resistance did not always decrease even if a large amount of the secretion was removed. The subjects with swollen turbinates sometimes showed a considerable decrease in the resistance after the removal of the secretion. In general, nose blowing tended to decrease the resistance value when a certain amount was expelled in abnormal subjects. Excessive retention of the secretion inhibited the measurement because of the inflow of the fluid into the conducting tube.These results suggest that the retained secretion in the nasal cavities should preferably be cleansed by blowing before the measurement.
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