The nasal provocation test: response patterns

We studied a group of allergic patients by active anterior rhinomanometry. We performed the nasal provocation test (NPT) and we observed two kinds of responses. The Type I pattern consists of an increase in delta P and an increase in resistance. The type II pattern consists of an increase in the flow value (V) and an increase in resistance. There are significant differences in the frequency of the two patterns among the allergens.