Intrasubject test-retest variability in clinical electrocochleography

Peter S. Roland, Jeff Rosenbloom, Wende Yellin, William L. Meyerhoff

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Seventeen healthy volunteers without a history of auditory or vestibular difficulty and with normal screening audiometry had bilateral (34 ears) electrocochleography performed repeatedly at 1-week intervals. Each subject had from four to seven electrocochleograms performed on each ear. Measurements were made in the external auditory canal using a gold-foil “TIPtrode.” Amplitude and latency for the summating potential (SP) and action potential (AP) were measured and SP/AP ratios were calculated. Averages and standard deviations for amplitude, latency, and SP/AP ratios were computed. The average SP/AP ratio was 0.22 with a standard deviation of 0.06. The range was 0.04 to 0.50, The average difference between the highest and lowest SP/AP ratio for a given individual was 0.155 (i.e., the range 0.03 to 0.31) with a standard deviation of 0.07. These normative data are useful in assessing the results of dehydration electrocochleography and in establishing how much test-retest variation is required to suggest pathology.

Original languageEnglish (US)
Pages (from-to)963-966
Number of pages4
Issue number9
StatePublished - Sep 1993

ASJC Scopus subject areas

  • Otorhinolaryngology


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