Videonystagmographic (VNG) evaluation,
bithermal caloric test, positional tests, and other tests such as head-shaking, clinical head impulse, Romberg's and sharpened Romberg's, Unterberger's stepping, and eyes open/closed tandem gait tests were performed.
(1) Standard ENG/VNG testing includes the alternate binaural
bithermal caloric test (ABBT) originally described by Fitzgerald and Hallpike.
Vestibular dysfunction of patients was evaluated by the binaural
bithermal caloric test. We used 50[degrees]C air as the warm stimuli and 24[degrees]C air as the cold stimuli.
The simultaneous binaural
bithermal caloric test elicited a type 2 response that was consistent with a reduced vestibular response (RVR) right.
During the simultaneous binaural
bithermal caloric test, a left-beating nystagmus was seen in response to the warm stimulus.
The altemate binaural
bithermal caloric test elicited a 56% reduced vestibular response (RVR) on the left, and the simultaneous binaural bithermal test yielded a type 2 response and an RVR left.
The alternate binaural
bithermal caloric test yielded a normal reduced vestibular response and directional preponderance.
The alternate binaural
bithermal caloric test elicited a normal reduced vestibular response (RVR) and directional preponderance.
The alternate binaural
bithermal caloric test showed no significant reduced vestibular response and a directional preponderance (DP) of 23% left.
The alternate binaural
bithermal caloric test elicited a 0% reduced vestibular response and a 0% directional preponderance.
The alternate binaural
bithermal caloric test showed no abnormal reduced vestibular response or directional preponderance.
The alternate binaural
bithermal caloric test elicited a significant 63% reduced vestibular response (RVR) left.