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PIPB function test?

Paul D Dybala dybala at utdallas.edu
Wed Jul 23 18:16:05 EST 1997

What we commonly do here at the Callier Center with our
adults is instead of testing at 35 SL we test discrim at
80 HL.   If the discrim is below 80% then we will go up 10 dB
and or drop 10 dB to see if there is a change.
Of course in some cases you need to test at 90 due to a greater
amount of loss.  The 80 dB level works for most cases.
Because for most cases patients will be hitting their peak at
about 80 dB HL.
If you can test at a the louder level and get decreased discrim
(checking to see if it is signifcantly different using the
Thorton and Raffin Tables)  You have rollover which of
course is consistent with retrocochlear pathology.

If you test at the softer level and get improved dicrim scores
then your rollover occurs at 80 dB HL and is consistent with
retrocochlear pathology.
If you get normal discrim scores 80% or better, then you have
"taxed" the system and do not need to present additional lists.
Take a look in the new KATZ text at the Rush Hughes articulation function
for W-22 Lists and you will see what I mean.
Of course, taking a look at the case history will also give you some clues
on wether you need to due lists at multiple intensities.  Tinnitus, recent
change in hearing, asymmetry etc!
Paul Dybala

MHamila (mhamila at aol.com) wrote:
> I would like to know if any of you still use the PIPB function test?  I
> was told by the audiologist that I work with that noone uses that test
> anymore.  However I still use it.  Any thoughts would be greatly
> appreciated.
> Debbie  

Thank you for your support,
Paul Dybala
dybala at utdallas.edu

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