Tone decay test and SISI test are used to detect:
A. Cochlear and retrocochlear pathology respectively
B. retrocochlear and cochlear pathology respectively
C. Cochlear pathology
D. Retrocochlear pathology
E. functional HL
The
Answer is. B. retrocochlear and cochlear pathology respectively
These are special test of hearing. They
are used in patients with sensorineural hearing loss to further differentiable
a cochlear or a retrocochlear cause.
Special test of hearing include
|
Cochlear tests
|
SISI Test
ABLB test
|
|
Retrocochlear tests
|
Tone decay test
Speech discrimination score
|
SISI (Short Increment
Sensitivity Index) is designed to test the ability to recognise 1 dB increase
in intensity during a series of bursts of pure tones presented 20 dB above
threshold. The SISI test differentiates between cochlear and retrocochlear
disorders. A patient with a cochlear disorder will be able to perceive the increments
of 1 dB, a patient with a retrocochleardisorder will not.
Tone
Decay Test:
the sounding of a continuous tone at threshold for 1 min; if the intensity must
be increased by more than 5 dB for continued perception, it is indicative of a
neural hearing loss
