fistula test

fis·tu·la test

compression or rarefaction of the air in the external auditory canal excites nystagmus when there is an erosion of the otic capsule, so long as the labyrinth remains capable of functioning.
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3,4) Vartiainen et al found that a positive vestibular fistula test was even more often negative than positive in patients with a surgically demonstrated fistula.
A fistula test in the right ear was positive, with both a mild right-beating nystagmus and a sensation of vertigo.
2) Over the years, the most frequently studied physical examination finding has been the fistula test for Hennebert's sign.
Findings on the Hallpike maneuver, the fistula test, and examination of the sinus, pharynx, and neck were also normal.