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A Journal on Otorhinolaryngology, Head and Neck Surgery,
Plastic Reconstructive Surgery, Otoneurosurgery
Indexed/Abstracted in: EMBASE, Scopus
Otorinolaringologia 1998 June;48(2):63-6
Electrocochleography in CSOM: click stimulus vs tone bursts
Chauhan Jaimanti K., Mann S. B. S., Panda N. K., Gupta A. K., Raghunathan M.
From the Department of Otolaryngology Postgraduate Institute of Medical Education & Research Chandigarh, India
Electrocochleography was conducted on 30 patients with dry central perforations of the tympanic membrane. Cochlear microphonics (CM), summating potential (SP) and action potential (AP) were found to be 0.8 uV, 0.3 uV and 7.48 uV respectively in cases of CSOM with moderate degree of conductive hearing loss. The SP/AP ratio was found to be 0.11. An increase in the latency and decrease in amplitude of electrical potentials was also found. Click as stimulus was found to be better than tone bursts in a significant number of cases (p<0.01).