Twenty-seven adults of both genders, aged between 19 and 57 years, with pre-lingual or post lingual severe to profound hearing impairment
, with cochlear implants participated.
Type of Noise in Two Groups of Patients Studied Type of Noise Group I Group II Total Continuous 100 (100%) 0 (0%) 100 (50%) Intermittent 0 (0%) 100 (100%) 100 (50%) Total 100 (100%) 100 (100%) 200 (100%) Table 14 Category Type of Impairment I Mild hearing Impairment II a) Moderate hearing Impairment II b) Severe hearing Impairment III a) Profound hearing Impairment
c) Total deafness Category dB Level Percentage (%) of Impairment I 26--40 dBHL in better ear Less than 40% II a) 41--60 dBHL in better ear 40% to 50% II b) 61--70 dB in better 71% to 100% III 71 to 90 dB 100% 91 dB and above in better ear
Our results further verified this point as the affected individuals of families F1 and F2 had moderate and profound hearing impairment
Ear examination and Pure Tone Audiometry was performed to rule out any profound hearing impairment
. Simple reaction time was calculated by BioPac Student Data acquisition system.
The compound heterozygosity for a mild and severe mutations leads to postlingual hearing loss, whereas the combination of two severe mutations leads to profound hearing impairment
with a prelingual onset .
Understanding minds: Early cochlear implantation and the development of theory of mind in children with profound hearing impairment
. International Journal of Pediatric Otorhinolaryngology, 78, 537-543.
The level of hearing impairment in this study was predominantly either mild or moderate; only two cases (3.9%) were found to have severe DHI and no cases of profound hearing impairment
As cochlear implantation, auditory brain stem implants and bone hearing aids are relatively expensive equipments and parents whose children face more chronic disabilities of ear are more depressed to give a hopeful life to their children with severe to profound hearing impairment
according to the above definition, are either totally without hearing or have profound hearing impairment
(greater than 90dB).
At the hospital's ENT unit, 20 of 24 patients who underwent surgery for profound hearing impairment
in the past 18 months were children under the age of seven.
A number of genes causing pre-lingual, severe to profound or profound hearing impairment
have been identified using single consanguineous family.