Simplification of thermal vestibular test with special reference to OGI test |
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Authors: | S C Mishra Harsh Sharma and A K Mehrotra |
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Abstract: | The vertigo and nystagmus are the results of vestibular stimulation and effected by ocular fixation. This study was conducted
in twenty five cases each of peripheral and central vestibulopathy for oculagyric illusion based, caloric (OGI) test and 20
cases for OGI and Isothermal Binaural Simultaneous Caloric Irrigations (Brookler test). Duration of induced nystagmus was
60 to 200 seconds on caloric test and 84 to 260 seconds on OGI caloric test. Brocher test revealed pathological DP in 2 eases
which had CP and DP of more than 13% on OGI test. The response of caloric test appear similar though the nystagmography is
more sensitive test followed by the culmination beat wider Frenzel glasses and best being OGI. The reliability of OGI was
highest in comparison to caloric test under Frenzel glasses and ENG in eases of albinos. The relevance of these findings were
discussed. |
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