Ivarsson A, Lundgren C E, Tjernstrom O, Uddman R, Ornhagen H
Undersea Biomed Res. 1977 Mar;4(1):9-18.
The effects of head-out immersion on active and passive middle ear pressure equilibration were studied in three otologically normal scuba divers. Results were compared with the equilibration capacity recorded in the nonimmersed sitting and supine positions. Head-out immersion had only a minor effect on the ability to equilibrate the middle ear pressure actively during descent; passive ear clearing during ascent was slightly more difficult compared with this capacity in the sitting nonimmersed position. In the supine position ear clearing was significantly more difficult during both ascent and descent, which indicates that it is preferable to assume an upright body posture during exposures to pressure changes in dry pressure chambers. Mechanisms that might influence the ability to equilibrate the middle ears are discussed.
对三名耳部正常的水肺潜水员进行了头露出水面浸入式潜水对主动和被动中耳压力平衡影响的研究。将结果与在非浸入式坐姿和仰卧位记录的平衡能力进行了比较。头露出水面浸入式潜水对下降过程中主动平衡中耳压力的能力影响较小；与非浸入式坐姿相比，上升过程中被动清除耳部压力稍微困难一些。在仰卧位时，上升和下降过程中清除耳部压力都明显更困难，这表明在干式压力舱内压力变化时，最好采取直立的身体姿势。文中讨论了可能影响中耳平衡能力的机制。
