The ventilation of the paranasal sinuses is essential for the aerosol inflow. But the ventilation between the nasal cavity and the maxillary sinus has not been made clear enough. In this study, we measured the differential pressure between the nasal cavity and the maxillary sinus by using our new hydrodynamic technique. Increasing in the frequency of alternations, the values of differential pressure, and the rate of exchange in the maxillary sinus content were increased. Furthermore, the speed of flows in the ostium were estimated from exchange rate in the maxillary sinus. We simultaneously measured the nasal cavity and the maxillary sinus pressures during quiet breathing in human subjects. The enlarged maxillary ostium and additional counter opening at the inferior nasal meatus markedly increased the differential pressure of the maxillary sinus. It was suggested that the ventilation between the nasal cavity and the maxillary sinus increase, as the flow rate of fluid passing through the nasal cavity increase, and also that when the respiration frequency is a little increased, the exchange rate of the content of the maxillary sinus between the nasal cavity and the maxillary sinus markedly increases. From these results, it is considered that flow conditions through the nose might affect exchange rate in the maxillary sinus content. It may be desirable to increase the air flow rate in the nasal cavity and to make the maxillary ostium and the counter opening large enough in order to introduce a number of aerosol particles inside the maxillary sinus.
|ジャーナル||JIBI INKOKA TEMBO|
|出版ステータス||Published - 01-01-1998|
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