Department of Otolaryngology, University of Florida, Gainesville, FL, USA.
Department of Radiology, University of Florida, Gainesville, FL, USA.
Acta Otolaryngol. 2020 Nov;140(11):889-892. doi: 10.1080/00016489.2020.1800815. Epub 2020 Aug 17.
Perilymph gusher (PLG) is a rare complication of otologic surgery attributed to a communication between the cochlea and the internal auditory canal (IAC). Subtle patency between the cochlear basal turn and IAC has recently been identified on computed tomography (CT) as a risk factor, specifically when the defect is > 0.75 mm.
Investigate the prevalence of radiographic cochlear basal turn patency.
Patients with CT of the temporal bones and inner ears interpreted as "normal" were included. An otologist and a radiologist independently reviewed CTs to measure radiographic dehiscence in an oblique plane along the interface of the cochlea and IAC. Known PLGs were excluded.
Two hundred and ten ears were included (88 conductive or mixed hearing loss, 62 sensorineural hearing loss, 41 audiometrically normal ears). 71 ears (33.8%) were radiographically patent. Mean defect width was 0.41 mm (0.15-0.7 mm). Defect width was not associated with type of hearing loss, age, or gender. No defects were wider than 0.75 mm.
Radiographic patency of the cochlear basal turn may be present in patients with hearing loss and normal hearing, but patency > 0.75 mm (i.e. risk for PLG) is rare.
迷路漏（PLG）是耳科手术的一种罕见并发症，归因于耳蜗和内听道（IAC）之间的沟通。最近在计算机断层扫描（CT）上发现耳蜗基底转和 IAC 之间存在细微的通透性是一个危险因素，特别是当缺陷>0.75mm 时。
调查耳蜗基底转影像学通透性的发生率。
纳入颞骨和内耳 CT 解读为“正常”的患者。一名耳鼻喉科医生和一名放射科医生独立地对 CT 进行了评估，以测量在耳蜗和 IAC 界面处的斜平面上的影像学裂隙。排除已知的 PLG。
共纳入 210 只耳朵（88 只传导或混合性听力损失，62 只感音神经性听力损失，41 只听力正常）。71 只耳朵（33.8%）存在影像学通透性。平均缺陷宽度为 0.41mm（0.15-0.7mm）。缺陷宽度与听力损失类型、年龄或性别无关。没有缺陷大于 0.75mm。
听力损失和听力正常的患者可能存在耳蜗基底转的影像学通透性，但大于 0.75mm（即 PLG 风险）的通透性很少见。
