Walsted A, Salomon G, Olsen K S
Københavns øre-, naese- og halsafdelingen, Amts Sygehus i Glostrup.
Ugeskr Laeger. 1993 Sep 20;155(38):3009-11.
Audiological tests were conducted on 34 patients before and after undergoing an operation in spinal anaesthesia. One of these patients developed a considerable unilateral hearing loss in the low-frequency range, which persisted until an epidural blood-patch was given. Unexpectedly, we also found a general small but significant threshold shift at 500 Hz, which has never before been described in the literature. The biological mechanism is discussed, and the results suggest that the explanation of the hearing loss could be a condition similar to endolymphatic hydrops, resulting from perilymphatic hypotension due to loss of liquor during and after the spinal anaesthesia.
对34例接受脊髓麻醉手术的患者进行了听力测试。其中一名患者在低频范围内出现了相当严重的单侧听力损失，这种情况一直持续到进行硬膜外血贴治疗。出乎意料的是，我们还发现在500Hz处普遍存在一个虽小但显著的阈值变化，这在以前的文献中从未有过描述。文中讨论了其生物学机制，结果表明听力损失的原因可能是一种类似于内淋巴积水的情况，这是由于脊髓麻醉期间及之后脑脊液流失导致外淋巴低血压所致。
