Associate professor ENT Nodal Officer Cochlear Implant Program SMS Medical College and Hospital Jaipur Which investigation Pure tone audiometry Auditory brainstem Evoked Response Speech Discrimination Score rarely used ID: 913069
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Slide1
Hearing disability
Dr
Mohnish Grover
Associate professor ENT,
Nodal Officer, Cochlear Implant Program,
SMS Medical College and Hospital, Jaipur
Slide2Which investigation?
Pure tone audiometry
Auditory brainstem Evoked Response
Speech Discrimination Score (rarely used)
Slide3How to calculate
Consider the better ear only
Calculate average of hearing loss (dB) in speech frequencies
Use that average for calculating the disability
Slide4How to calculate
Category
Type
of impairment
PTA of better ear
(dB)
Speech discrimination
score of better ear
Percentage of disability
I
Mild
26-40
80-100%
<40%
IIa
Moderate
41-60
50-80%
40-50%
IIb
Severe
61-70
40-50%
51-70%
IIIa
Profound
71-90
<40%
71-99%
IIIb
Total
>91
Very poor
100%
Slide5What next?
Please do not stop at giving certificates only.
If a congenitally deaf child comes to you who is hearing and speech challenged please refer him for cochlear implant to higher
centres
Slide6THANK YOU