Cochlear Implant Evaluation -- Promontory Stimulation Test
erc at cinenet.net
Fri Sep 1 15:41:16 EST 1995
Does anyone reading this know anything about the promontory
In addition to wanting general information about it, I also have
some specific questions about it:
1. If the test causes a poking sensation, as if someone were poking
something inside the ear canal, does that imply that a cochlear
implant would cause the same sensation? The poking sensation
was directly associated with the signal. That is, the sensation
of sound and the sensation of poking would happen simultaneously.
2. What is the significance of "adaptation?"
3. What is the significance of not being able to reach uncomfortable
loudness? In other words, the UCL is beyond the maximum of the
machine. Does that imply that there might be a loose connection
or something? Or is it common?
In this particular case, the poking sensation was in one ear and the
lack of UCL was in the other. The poking sensation itself was the
limiting factor in ear it happened in. In the ear without UCL, the
loudest signal did sound loud, just not uncomfortably loud.
4. Why would the test cause a distortion of the sense of balance?
Can the local anesthesia cause that, or would it more likely be
caused by the signal stimulating the wrong nerves? The effect
lasted for about an hour after the test was over, and caused
seasickness, which gradually got worse during that hour, even
though the effect itself didn't get worse.
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