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To examine the difference between response of nasal mucosa to specific antigen and that to non-specific stimulus in the same patient, specific nasal provocation was performed using the house dust antigen disk while nasal respiratory resistance was continuously measured by Rhinograph. On the other hand, non-specific nasal provocation was performed with inhalation of methacholine while nasal respiratory resistance was continuously measured with Astograph. Thereafter the resulting response curves were analyzed. Subjects were 12 males and 9 females, who had nasal obstruction, watery rhinorrhoea and sneeze, and were proved to have allergic rhinitis by house dust. To analyze specific response curve, primary nasal respiratory resistance (Rrs.N), reacting time (Ta) and slope signifying increase of nasal respiratory resistance (delta Rrs.N) were used as parameters. To analyze non-specific response curve, primary nasal respiratory resistance (Rrs.N.cont), minimum dose of methacholine that caused an increase of nasal respiratory resistance (Dmin.N) and slope signifying increase of nasal respiratory resistance (Sd.N) were used as parameters. Ta and Dmin.N reflect sensitivity of nasal mucosa. Their values become smaller, it means sensitivity of nasal mucosa becomes higher. Delta Rrs.N and Sd.N reflect reactivity of nasal mucosa. Their values become larger, it means reactivity of nasal mucosa becomes larger.(ABSTRACT TRUNCATED AT 250 WORDS)

The difference between response of nasal mucosa to specific antigen and that to non-specific stimulus.