Abstract
The flow rate and flow volume of nasal and oral respirations of snorers were measured separately under three conditions: awake, a sleep without snoring, and a sleep with snoring.
1. Respiration with the mouth open was scarcely observed when the patients were awake, but when they were sleeping with or without snoring, almost all patients respired with the mouth open. However, even when they were snoring with the mouth open, the flow volume through the nose was higher than through the mouth.
2. The wave form of the flow rate showed gentle curves when the patients were awake or a sleep without snoring. On the other hand, when the patients were snoring, the curves showed various fluctuations.
3. The flow volume tended to be lower during sleep without snoring than when awake, and decreased further during snoring.
4. When the oral and nasal flow rates during snoring were compared, the rate was almost the same in inspiration and expiration in one group, but different in another group.
5. The respiratory rate was maximum in sleep with snoring and minimum when awake.
