Cochlear blood flow in sudden deafness

耳蜗血流障碍可能是突发性耳聋的病理生理学因素之一。本文对9例疑有外淋巴瘘的突发性聋患者进行了耳蜗血流测定。在探索性鼓膜切开术中，将激光多普勒探头的尖端连接到圆窗龛前部附近的岬上。增加了激发光纤和接收光纤之间的距离，以提高最大深度灵敏度。在所有9名患者中，观察到对应于ECG的激光输出的平行移动。我们试图测量二氧化碳对耳蜗血流的影响，如吸入卡波琴和呼吸停止。然而，在大多数情况下，这些程序没有观察到耳蜗血流的显着变化。

Impairment of cochlear blood flow may be one of the factors implicated in the pathophysiology of sudden deafness. Cochlear blood flow in sudden deafness was measured in nine patients who were suspected of having perilymphatic fistulas. During exploratory tympanotomy, the tip of a laser-Doppler probe was attached to the promontory near the anterior portion of the round window niche. The distance between the exciting and receiving optic fibers was increased to elevate the maximum depth sensitivity. In all nine patients, pulsatory movement of the laser output that corresponded to ECG was observed. We attempted to measure effects of carbon dioxide on cochlear blood flow, such as inhalation of carbogen and cessation of respiration. In almost cases, however, no significant change of cochlear blood flow was observed by these procedures.