PURPOSE: To compare the measurement of nasal air escape, carried out using the Glatzel mirror, in children with and without upper respiratory tract obstruction, according to sex and age. METHODS: The sample comprised 43 subjects, with mean age of 6.9 years, divided into four groups: children with surgical indication to clearing of the upper respiratory tract (surgical group), allergic children with upper respiratory tract obstruction (allergic group), allergic children with obstruction and surgical indication (surgical and allergic group), and children without obstruction (control group). Nasal air escape measurement was carried out using the Altmann's Millimetered Nasal Mirror, and data was measured in cm² by the AutoCAD 2002 software. Data was analyzed using descriptive statistics and hypotheses testing, with a significance level of 5%. RESULTS: The control group presented the highest mean (6.53 cm²) of nasal air escape, while surgical and allergic group presented the lowest mean (3.07 cm²). The means of the allergic group and the surgical group were 4.74 cm² and 5.91 cm², respectively. Only the surgical and allergic group presented statistically significant difference compared to the control group. CONCLUSION: The Glatzel mirror demonstrated not to be a trustworthy instrument for the evaluation of nasal permeability in the analyzed sample, except in cases of severe nasal obstruction, that is, allergic patients with surgical indication. No correlations were found with the variables sex and age.
Nasal obstruction; Mouth breathing; Evaluation studies; Permeability; Child
