Standardizing selection criteria in nasal medication studies.

UNLABELLED Clinical studies on nasal topical medications require the standardization of 'nasosinusal normality' in order to establish control groups through a specific evaluation of the upper airways. AIM to standardize the evaluation of candidates for control groups in clinical studies on nasal topical medications. MATERIAL AND METHODS healthy male volunteers of 18 to 50 years of age, asymptomatic from the nasosinusal standpoint were subjected to a sequential and excluding assessment made up of clinical evaluation, immediate hypersensitivity skin test, saccharin test, flexible nasofibroscopy and nasal cytology. STUDY DESIGN Cross-sectional contemporary cohort. RESULTS Of the 33 people originally enrolled, 14 (42.4%) were excluded for clinical reasons. Of the 19 remaining, 2 (10.5%) had atopy diagnosed in the skin test and were excluded. 17 were tested with saccharin and presented normal mucociliary clearance. Evaluation by nasal endoscopy showed abnormality in 2 cases (11.8%) and these were excluded. The remaining 15 were submitted to nasal cytology, which proved normal, representing 45.5% of those initially included. CONCLUSION The proposed protocol for sequential and excluding evaluation was effective in defining candidates for the establishment of control groups in clinical studies on nasal topical medications.