Depression of nasal mucociliary transport by an aerosol hair-spray.

The nasal mucociliary transport was measured on 15 healthy test subjects, using the saccharine method, before and after exposure to hair-spray and Freon. The hair-spray reduced the mucociliary transport in the nose for more than 1 h, whereas Freon had no effect. Hair-spray must be considered potentially dangerous, and investigations of the mucociliary transport in persons subject to prolonged exposure to hair-spray (ladies' hairdressers) must be relevant.