INTRODUCTION: The measure of inspiratory nasal flux apex (INFA) is obtained in a simple and quick way, but not much diffused in Brazil. The analogic visual scale(AVS) for nasal obstruction is asubjetive measure that can also be used. OBJECTIVE: To evaluatethe correlation between INFA and AVS for nasal obstruction, before and after a nasal potency change, provided by topic vasoconstriction. Study draw: experimental and clinic study not randomized. Methods: 60 volunteers included patients, doctors, nurses and administrative auxiliaries from the Instituition were submitted to INFA and AVSexams before and after the nasal vasoconstriction with oxymetazoline hydrochloride 0,05%. RESULTS: The medical value found for AVS pre vasoconstriction was 4,1 and 2 after vasoconstriction. This represents avariation of 44% among the measures. Concerning the INFA values, the media found in pre vasoconstriction mensuratiion was 151 l/mim and 178l/mim after vasoconstriction, presenting an addition of 20%. In the pre vasoconstriction moment, the increase of one point in middle value of AVS, correspondes to decrese of 3,8% in middle value of INFA. In pos each increase of a point in AVS middle value correspondes of 4,5% in INFA middle value. CONCLUSION: There was an important correlation between thenasal obstruction objective measure through the INFA with subjective mensuration provided by AVS before the nasal vasoconstrictor usage.
nasal obstruction; nasal cavity; nasal decongestants
