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:: Volume 1, Issue 1 (4 1992) ::
aud 1992, 1(1): 7-8 Back to browse issues page
Acoustic Reflex measurements in Normal, Cochlear, and Retrocochlear lesions  -part1
Navid Shahnaz
Abstract:   (9996 Views)

The cut off points of 90th percentile of acoustic reflex thresholds were determined in the normal and sensory hearing loss.All subjects had measurable hearing(ANSI-1969≤110 dBHL) in three frequencies of 500,1000 and 2000Hz.

While hearing loss was more than 55dB, The cut off point was higher in studies that NR responses was included.

In cases that hearing loss was less than 75dB, 90th percentile can be used in diganosis of retrochochlear lesions.Since Acoustic reflexes are absent in both mentioned pathologies in greater amount of hearing loss,It would be less efficient in diffrential diganisis of cochlear and retrochochlear lesions to use acoustic reflex thresholds under the mentioned circumstances.

Keywords: Acoustic reflex measurement, sensory hearing loss, retrochochlear lesions, 90th percentile
Full-Text [PDF 1515 kb]   (1747 Downloads)    
Type of Study: Translated Article |
Accepted: 2013/08/24 | Published: 2017/09/10
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Volume 1, Issue 1 (4 1992) Back to browse issues page
شنوایی شناسی - دانشگاه علوم پزشکی تهران Bimonthly Audiology - Tehran University of Medical Sciences
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