1994 Volume 37 Issue 2 Pages 136-141
It has been known that the latency of compound action potential (CAP) from the ear with experimental endolymphatic hydrops differed from that of the normal ear when two stimulus phase, rarefaction (R) and condensation (C), were used. Based on the above finding, ABRs using two kinds of click stimulus of R and C were recorded from edght patients with low frequency sensorineural hearing loss, who were suspected as having endolymphatic hydrops.
We found that the difference between the wave I latencies of ABRs by R and C stimulus tones tended to decrease in the low frequency sensorineural hearing loss compared with normal cases, but the difference was not significant. The result may suggest that the ABR testing with this method is not accurate enough to make an objective diagnosis of endolymphatic hydrops in the low frequency sensorineural hearing loss.
