[Electrocochleography possibilities in the differential diagnosis of hydrops and neural hearing loss].
Enhancement of the click-evoked summating potential causing a pathological summation to compound action potential ratio (SP/CAP) in patients with endolymphatic hydrops has been described by several groups. An increased SP/CAP ratio is found also in some patients with a tumour of the cerebellopontine angle. The study of further parameters of the SP/CAP complex, such as the CAP latency and the width of the complex, permit an electrocochleographic differentiation between both forms of hearing loss. The N2 amplitude showed no diagnostic significance.
Marangos
N
N
HNO-Klinik, Medizinischen Hochschule Hannover.
Mausolf
A
A
Ziesmann
B
B
D001300:Audiometry, Evoked Response; D003056:Cochlear Nerve / Q000503:physiopathology; D003937:Diagnosis, Differential; D004487:Edema / Q000175:diagnosis* / Q000503:physiopathology; D004710:Endolymph / Q000502:physiology; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D007761:Labyrinthine Fluids / Q000502:physiology; D008575:Meniere Disease / Q000175:diagnosis* / Q000503:physiopathology; D009464:Neuroma, Acoustic / Q000175:diagnosis / Q000503:physiopathology; D011930:Reaction Time / Q000502:physiology
Elektrokochleographische Möglichkeiten zur Differentialdiagnose zwischen hydropischer und neuraler Schwerhörigkeit.