Hussein A, Abousetta A
Department of Otorhinolaryngology,Cairo University,Egypt.
Department of Otorhinolaryngology,Suez Canal University,Egypt.
J Laryngol Otol. 2014 Jul;128(7):612-7. doi: 10.1017/S0022215114001467. Epub 2014 Jul 14.
To explore the role of the nine-step inflation/deflation tympanometric test and resting middle-ear pressure range as predictors of barotrauma in aircrew members.
A prospective, non-randomised study was conducted on 100 aircrew members. Resting middle-ear pressure was measured and the nine-step inflation/deflation test performed on all subjects before flights. Subjects were allocated to two groups according to resting middle-ear pressure range (group A, within the range of +26 to +100 and -26 to -100 mmH2O; group B, -25 to +25 mmH2O). All aircrew members were assessed after flights regarding the presence and the grade of barotrauma.
In both groups, the sensitivity and specificity values of the entire post-inflation/deflation test were close to those of the post-deflation part of the test. The post-deflation test had a higher negative predictive value than the post-inflation test. Ears with resting middle-ear pressure lower than -55 mmH2O experienced barotrauma, regardless of good or poor post-inflation or post-deflation test results.
In an aircrew member, a resting middle-ear pressure within the range of -55 and +50 mmH2O, together with good post-deflation test results, are considered reliable predictors for fitness to fly.
探讨九步充气/放气鼓室导抗测试及静息中耳压力范围对机组人员气压伤的预测作用。
对100名机组人员进行了一项前瞻性、非随机研究。在飞行前测量所有受试者的静息中耳压力并进行九步充气/放气测试。根据静息中耳压力范围将受试者分为两组（A组，+26至+100以及-26至-100 mmH₂O范围内；B组，-25至+25 mmH₂O）。所有机组人员在飞行后接受关于气压伤的存在情况及严重程度的评估。
在两组中，整个充气/放气测试后的敏感度和特异度值与放气后测试部分的相近。放气后测试的阴性预测值高于充气后测试。静息中耳压力低于-55 mmH₂O的耳朵会出现气压伤，无论充气后或放气后测试结果是好是坏。
对于机组人员，静息中耳压力在-55至+50 mmH₂O范围内，同时放气后测试结果良好，被认为是适合飞行的可靠预测指标。
