All patients with unilateral hearing loss in group B, except for one patient who did not undergo the caloric test
, had ipsilateral vestibular dysfunction associated with CP, but the patients with same condition in group A had no unilateral vestibular dysfunction (Table 3).
An air caloric irrigator is essential for doing the caloric test
in patients with perforation or operated mastoid cavity.
In patients who have a complete unilateral vestibular loss secondary to vestibular neurectomy or labyrinthectomy, the reported sensitivity and specificity of the HIT both reached the area of 100% when the ENG/VNG caloric test
results were used as a reference.
The caloric test
identified 7 (29.2%) subjects with normal reflexes, 8 (33.3%) with unilateral hyporeflexia or areflexia, 3 (12.5%) with bilateral hyporeflexia and 6 (25%) with bilateral vestibular areflexia (AVB).
Conclusion: It does not seem that o-VEMP and v-HIT tests can replace the caloric test
to detect vestibular hypofunction.
In these patients, the most frequent abnormal test result was found in the rotatory chair ; interestingly, findings in the rotatory chair test correlate well with the caloric test
performed with air stimulation .
Compared to caloric test
, Stepping Test was considered as unreliable for peripheral vestibular asymmetry screening.
A caloric test
, in which water at different temperatures is poured into the ear to check on the vestibular apparatus.
The caloric test
was reported to be the only examination that can stimulate individual vestibular systems .
Firstly, the group with definite peripheral vertigo will have positive signs with some of the following tests: Dix Hallpike test, lateral semi-circular canal (SCC) test, caloric test
, HIT, and DVAT.
The vestibular test panel (also performed the day before surgery) consisted of caloric test
with bithermal irrigation and quantified according to slow phase velocities (Aqua Stim; Interacoustics, Middelfart, Denmark).
Initial symptoms, duration from initial symptoms to the diagnosis, hearing thresholds, audiogram patterns, and caloric test
results were collected and analyzed for each patient.