Correla？？o entre peak flow nasal inspiratório e escala visual analógica pré e pós uso de vasoconstrictor nasal

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.