Luntz M, Levi D, Sadé J, Herman M
Sarita and Felix Chair for Hearing Research, Ear Research Laboratory, Sackler School of Medicine and Bioengineering Program, Tel-Aviv University, Israel.
Laryngoscope. 1995 May;105(5 Pt 1):510-2. doi: 10.1288/00005537-199505000-00012.
Concomitant continuous measurements of the steady-state gas composition of the middle ear and of the venous blood were recorded by mass spectrometry in four guinea pigs. The following mean values were obtained for the partial pressures of middle ear gases; nitrogen + argon, 606.4 mm Hg; oxygen, 46.2 mm Hg; and carbon dioxide, 60.2 mm Hg. The corresponding values for the venous blood were as follows: Nitrogen + argon, 563.4 mm Hg; oxygen, 38.0 mm Hg; and carbon dioxide, 61.4 mm Hg. The similarity of the steady-state gas composition of the middle ear to that of the venous blood suggests that the partial pressures of the gases in the middle ear are controlled by interchange with gases present in the blood.
通过质谱法对四只豚鼠的中耳稳态气体成分和静脉血进行了同步连续测量。获得了中耳气体分压的以下平均值：氮气+氩气，606.4毫米汞柱；氧气，46.2毫米汞柱；二氧化碳，60.2毫米汞柱。静脉血的相应值如下：氮气+氩气，563.4毫米汞柱；氧气，38.0毫米汞柱；二氧化碳，61.4毫米汞柱。中耳稳态气体成分与静脉血的相似性表明，中耳中气体的分压是通过与血液中存在的气体交换来控制的。
