Case report: two cases of hearing impairment due to intracranial hypotension.
We report two cases of spontaneous intracranial hypotension (SIH) that presented with orthostatic hearing impairment. Pure tone audiometry in case 1 and distortion-produced otoacoustic emissions (DPOAEs) in case 2 clearly revealed orthostatic low-frequency hearing impairment. The symptoms resolved with conservative therapy in case 1, but they did not resolve completely after three treatments with epidural blood patch in case 2. The orthostatic changes at low-frequency that were present in both examinations indicated a relative endolymphatic hydrops due to SIH. Both otological examinations were useful to infer the pathophysiology of hearing impairment associated with SIH.
Taki
Masakatsu
M
Department of Otolaryngology - Head and Neck Surgery, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan. taki@koto.kpu-m.ac.jp
Nin
Fumiaki
F
Hasegawa
Tatsuhisa
T
Sakaguchi
Hirofumi
H
Yamamoto
Satoshi
S
Suzuki
Toshihiro
T
Hisa
Yasuo
Y
D000328:Adult; D001301:Audiometry, Pure-Tone; D003051:Cochlea / Q000503:physiopathology; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D007022:Hypotension / Q000150:complications*; D020896:Hypovolemia / Q000134:cerebrospinal fluid; D011187:Posture; D012720:Severity of Illness Index