title: Postoperative hearing recovery in a case of delayed hearing loss after acoustic neurinoma removal.
abstract: Delayed postoperative hearing loss after acoustic neurinoma removal is seldom observed. The presented case illustrates the phenomenon of delayed postoperative hearing loss which was observed 4 days after removal of a large acoustic neurinoma. Intraoperative brainstem auditory evoked potentials (BAEP) revealed a gradual loss of wave V with preservation of wave I. In animal experiments a dissociated loss of BAEP has been associated with impairment of microcirculation due to secondary edema. Vasoactive treatment was initiated and after 11 days a partial hearing recovery could be documented. Transient disturbance in microcirculation of vasa nervorum of the cochlear nerve is assumed to be responsible for postoperative hearing fluctuation.
authors.affiliation: Neurochirurgische Klinik, Universität Erlangen-Nürnberg.
authors.forename: C
authors.initials: C
authors.lastname: Strauss
authors.forename: R
authors.initials: R
authors.lastname: Fahlbusch
authors.forename: M
authors.initials: M
authors.lastname: Berg
mesh_terms: D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold / Q000502:physiology*; D001933:Brain Stem / Q000503:physiopathology; D003911:Dextrans / Q000008:administration & dosage; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology*; D005260:Female; D006313:Hearing Loss, Central / Q000503:physiopathology*; D006438:Hemodilution; D006801:Humans; D008875:Middle Aged; D016343:Monitoring, Intraoperative; D009464:Neuroma, Acoustic / Q000503:physiopathology / Q000601:surgery*; D011183:Postoperative Complications / Q000503:physiopathology*; D013067:Speech Perception / Q000502:physiology
chemical_list: D003911:Dextrans