Hergils L, Magnuson B
Department of Otorhinolaryngology, Linköping University Hospital, Sweden.
Acta Otolaryngol. 1998 Sep;118(5):697-700. doi: 10.1080/00016489850183205.
The amount and composition of gas that enters the middle ear by the Eustachian tube is of interest in the study of middle ear pressure regulation. We have studied the gas composition in the nasal cavity through the respiratory cycle in humans by mass spectrometry. The findings were correlated to earlier findings regarding synchronization of swallowing and breathing. The composition of the gas that may pass the Eustachian tube at openings during swallowing seems to be very close to expiratory values: nitrogen 79.19%, oxygen 14.69%, argon 1.00% and carbon dioxide 5.10%.
通过咽鼓管进入中耳的气体量及成分是中耳压力调节研究中的一个重要关注点。我们通过质谱分析法研究了人类呼吸周期中鼻腔内的气体成分。研究结果与先前关于吞咽和呼吸同步性的研究结果相关联。在吞咽过程中咽鼓管开口处可能通过的气体成分似乎与呼气时的数值非常接近：氮气79.19%、氧气14.69%、氩气1.00%和二氧化碳5.10%。
