A quantitative technique for assessing nasal airway impairment

摘要: Abstract The controversy concerning the effects of impaired nasal respiration on dentofacial development stems largely from lack a reliable method to assess airway impairment. purpose this study was develop and validate quantitative technique estimate dimensions so that normal nasorespiratory function could be defined. involves modification theoretical hydraulic principle utilizes following equation cross-sectional area nose (N A ): NA=Vk [2(ΔP)d] 12 (where d=density air). Pressure drop (ΔP) across is measured simultaneously with airflow (V) through during breathing, using appropriate transducers PDP 1134 computer. An analog model upper used determine discharge coefficient (k) measurement error. Model studies demonstrate error less than 5% for areas 0.02 1.2 cm 2 . Studies involving eighteen adult subjects twenty-six children 8 11 years age revealed mean smallest 0.62 ± 0.17 0.43 0.076, respectively. results indicate should enable clinicians (1) size (2) distinguish between respiratory function, (3) quantitatively surgical and/or orthodontic treatment improving respiration.