Silverstein H, Wanamaker H H, Rosenberg S I, Crosby N, Flanzer J M
Am J Otol. 1994 Jan;15(1):101-7.
The ability of promontory testing (PT) to differentiate a retrocochlear from a cochlear lesion in a group of 88 patients having unilateral sensorineural hearing loss was assessed. Promontory stimulation was performed, using the Nucleus Promontory Stimulator (model Z10012, Cochlear Corporation, Melbourne, Australia), by placing a needle electrode transtympanically on the basal turn of the cochlea. Patients with measurable hearing gave inconsistent results. Patients who had undergone eighth nerve section or translabyrinthine removal of acoustic neuroma were used as controls. They had no perception of sound in response to electrical stimulation, and were unable to perform any part of the PT. Of nine patients with anacusis secondary to an acoustic neuroma, six were unable to perceive sound in response to electrical stimulation or perform any aspect of the PT. Of the three patients able to perceive sound, only one could perform the temporal difference limen (TDL) and gap detection (GAP) test. In patients with total deafness from other causes, 80 percent (24/30) were able to perceive sound with electrical stimulation, 46 percent (14/30) performed TDL, and 70 percent (21/30) performed the GAP tests. In patients with unilateral total deafness, promontory testing may aid in differentiating retrocochlear from cochlear lesions and help identify patients at risk for acoustic neuroma.
评估了岬刺激试验（PT）在88例单侧感音神经性听力损失患者中区分蜗后病变和耳蜗病变的能力。使用Nucleus岬刺激器（型号Z10012，澳大利亚墨尔本耳蜗公司），通过经鼓膜将针电极置于耳蜗基底转进行岬刺激。听力可测的患者结果不一致。接受过第八神经切断术或经迷路切除听神经瘤的患者用作对照。他们对电刺激无声音感知，且无法完成PT的任何部分。在9例继发于听神经瘤的全聋患者中，6例对电刺激无声音感知或无法完成PT的任何方面。在3例能够感知声音的患者中，只有1例能够进行时间辨别阈（TDL）和间隙检测（GAP）测试。在其他原因导致全聋的患者中，80%（24/30）能够通过电刺激感知声音，46%（14/30）进行了TDL测试，70%（21/30）进行了GAP测试。在单侧全聋患者中，岬刺激试验可能有助于区分蜗后病变和耳蜗病变，并有助于识别有听神经瘤风险的患者。
