Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Zurich, University of Zurich, Switzerland.
Department of Neuroradiology, Clinical Neuroscience Center, University Hospital Zurich, University of Zurich, Switzerland.
Otol Neurotol. 2022 Oct 1;43(9):e984-e991. doi: 10.1097/MAO.0000000000003658. Epub 2022 Aug 26.
To determine the prevalence of endolymphatic hydrops (EH) in cochlear implant (CI) candidates with idiopathic profound sensorineural hearing loss (SNHL) and its influence on the preservation of audiovestibular function after cochlear implantation.
Prospective case series.
Tertiary referral center.
CI candidates with idiopathic progressive SNHL, but without classic EH-associated symptoms.
Delayed intravenous gadolinium-enhanced inner ear fluid-attenuated inversion recovery magnetic resonance imaging as well as pure-tone audiograms, video head impulse tests, and vestibular evoked myogenic potentials before and 4 weeks after cochlear implantation.
Prevalence of EH before cochlear implantation, audiovestibular function before and after surgery in hydropic and nonhydropic ears.
Thirty-two ears in 16 CI candidates were included. Nine ears (28%) with EH were detected. Although preoperative hearing thresholds, utricular function, and semicircular canal function were not different between the two groups, saccular function was reduced in hydropic ears. Ten subjects received a unilateral CI. Of these, 3 (30%) showed EH on the implanted side. There was no difference regarding postoperative hearing loss between the two groups, but the results point toward a higher vulnerability of hydropic ears with respect to loss of otolith function after cochlear implantation.
This is the first study showing that EH can be assumed in about one third of CI candidates with idiopathic profound SNHL, but no classic EH-associated symptoms. Preliminary results suggest that EH has no influence on the preservation of cochlear function but could be a risk factor for loss of otolith function after cochlear implantation.
确定特发性进行性感音神经性听力损失（SNHL）患者中内淋巴积水（EH）的患病率，以及其对人工耳蜗植入后听觉前庭功能的保留的影响。
前瞻性病例系列。
三级转诊中心。
特发性进行性 SNHL 但无经典 EH 相关症状的人工耳蜗植入候选者。
延迟静脉内钆增强内耳液体衰减反转恢复磁共振成像以及纯音听力图、视频头脉冲试验和前庭诱发肌源性电位，在人工耳蜗植入前和植入后 4 周进行。
人工耳蜗植入前 EH 的患病率、积水耳和非积水耳手术前后的听觉前庭功能。
共纳入 16 名人工耳蜗植入候选者的 32 只耳朵。9 只耳朵（28%）发现 EH。尽管术前听力阈值、壶腹功能和半规管功能在两组之间无差异，但积水耳的椭圆囊功能降低。10 名受试者接受了单侧人工耳蜗植入。其中 3 只（30%）植入侧显示 EH。两组术后听力损失无差异，但结果表明，EH 耳在人工耳蜗植入后，耳石功能丧失的风险更高。
这是第一项研究，表明 EH 可假定为约三分之一的特发性进行性 SNHL 患者但无经典 EH 相关症状的人工耳蜗植入候选者。初步结果表明，EH 对耳蜗功能的保留没有影响，但可能是人工耳蜗植入后耳石功能丧失的危险因素。
