This study conducted on 100 cases divided into two groups the study
group included 60 patients with mean age 68.48% + 8.8, the control
group included 40 persons with mean age 33.90% + 7.77 years. all of
them subjected to pure tone nurtiometery, immitancemetery and transient
evoked otoacoustic emission (TEOAE). All patients showed diminusion of
hearing at all frequencies. all patients had normal tympanogram (Type A)
except 20% showed negative middle ear pressure (Type C). 55.75% of the
patients showed absent acoustic reflex. The study group showed absent
50% of TEOAE at 1, 2. 3 and 4 KHz with decreased amplitude and wave
reproducibility. We concluded that TEOAE response decreased substantially
with age and there was a good correlation between band reproducibility
and pure tone audiometery also between band reproducibility and
acoustic reflex at 1 KHz and there was a good relationship between absence
of acoustic reflex and absence of TEOAE at 1, 2 and 4 KHz. |
