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首页> 外文期刊>Otolaryngology--head and neck surgery: official journal of American Academy of Otolaryngology-Head and Neck Surgery >Video pneumatic otoscopy for the diagnosis of conductive hearing loss with normal tympanic membranes.
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Video pneumatic otoscopy for the diagnosis of conductive hearing loss with normal tympanic membranes.

机译：视频气动耳镜检查可诊断正常鼓膜传导性听力损失。

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OBJECTIVE: To evaluate the usefulness of video pneumatic otoscopy (VPO) for the diagnosis of conductive hearing loss (CHL) with normal tympanic membranes (TM). STUDY DESIGN: Prospective study. SETTING: Tertiary care hospital. SUBJECTS AND METHODS: Thirty-seven ears with CHL and 9 control ears with normal TMs were included. The VPO was performed preoperatively in all patients. The authors captured TM images in 3 stages of the VPO (static, positive, and negative pressure stage) in all subjects and measured the amount of relative position differences of the umbo. Pure-tone audiometry and temporal bone computed tomography (TBCT) were performed preoperatively. The possible causes of hearing loss were evaluated during exploratory tympanotomy in the patients with CHL. RESULTS: Fifteen patients had stapedial fixation, 10 had fixation of the malleus or incus (MIF), and 12 had ossicular discontinuity. The positional differences between the negative and positive pressure stage of the MIF group were significantly smaller between the CHL and control groups (P = .001). The air-bone gap showed no significant difference among the CHL groups. The sensitivity, specificity, and diagnostic accuracy of the VPO for the diagnosis of MIF, with a cutoff value of 1.5% or less in terms of the movement of umbo, were 80.0%, 92.6%, and 89.2%, respectively. These findings were comparable to those of the TBCT, which were 90.0%, 85.2%, and 86.5%, respectively. CONCLUSION: The VPO is a simple, noninvasive, and accurate tool for the differential diagnosis of CHL with a normal TM.
机译：目的：评估视频气动耳镜（VPO）在诊断正常鼓膜（TM）引起的传导性听力损失（CHL）中的实用性。研究设计：前瞻性研究。单位：三级医院。研究对象和方法：包括37只CHL耳朵和9只正常TMs对照耳朵。术前对所有患者均进行了VPO。作者在所有受试者的VPO的三个阶段（静压，正压和负压阶段）中捕获了TM图像，并测量了相扑的相对位置差异量。术前进行纯音测听和颞骨计算机断层扫描（TBCT）。在探索性鼓室切开术中，对CHL患者进行了听力损失的可能原因评估。结果：15例行骨固定，10例行内踝或耻骨（MIF）固定，12例听骨不连续。 CHL组和对照组之间，MIF组负压和正压阶段之间的位置差异明显较小（P = .001）。 CHL组之间的气骨间隙无显着差异。对于MIF的诊断，VPO的敏感性，特异性和诊断准确度分别为80.0％，92.6％和89.2％，根据umbo的运动截断值为1.5％或更小。这些发现与TBCT的发现相当，分别为90.0％，85.2％和86.5％。结论：VPO是一种简单，无创，准确的工具，可与正常TM鉴别诊断CHL。

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