Brackmann D E, Hitselberger W E
Laryngoscope. 1978 Feb;88(2 Pt 1):286-97. doi: 10.1288/00005537-197802000-00011.
Excellent exposure of the cerebellopontine angle is obtained by an approach through the mastoid posterior to the labyrinth. Since the major portion of the dissection is extradural, this approach is associated with a very low morbidity. The retrolabyrinthine approach has been used for several years for selective partial section of the posterior root of the trigeminal nerve in cases of trigeminal neuralgia. Complete relief of pain has been accomplished in 25 of 28 cases, and the other 3 patients had partial relief of pain. The only complications in these patients were partial hearing impairment in 2, and 1 partial abducens nerve paralysis which subsequently recovered completely. Two patients required secondary closure of cerebrospinal fluid leaks. This approach has also been used for exploration and biopsy of cerebellopontine angle tumors and for treatment of other cranial nerve problems. We conclude that the retrolabyrinthine approach is the preferred route to the cerebellopontine angle in a variety of clinical conditions.
通过经迷路后方的乳突入路可很好地显露桥小脑角。由于大部分手术操作是在硬膜外进行，所以该入路的发病率极低。迷路后入路多年来一直用于三叉神经痛病例中三叉神经后根的选择性部分切断术。28例中有25例疼痛完全缓解，另外3例疼痛部分缓解。这些患者仅有的并发症是2例出现部分听力损害，1例出现展神经部分麻痹，但随后完全恢复。2例患者需要二次封闭脑脊液漏。该入路也已用于桥小脑角肿瘤的探查和活检以及其他颅神经问题的治疗。我们得出结论，在多种临床情况下，迷路后入路是到达桥小脑角的首选途径。
