Ventilation in the Nasal Sinuses

摘要

With each respiration interchange of air occur between the sinus cavity and that of the nasal. The course with which this interchange takes place has been reported elsewhere. Anatomically, the size of the natural ostium plays an important role in the mechanism of this air-interchange. Experimentally, the size of the natural ostium and the corresponding changes of air pressure that may occur within the sinus cavity have been studied. Normally, when the natural ostium has an opening of 4 mm in diameter the intra-sinus air pressure would amount to about +- 6 mmH sub 2 O. These tests have been repeatedly conducted also on cadavers and confirmed by using smoke as indicator. (ERA citation 04:045429)