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ENT · Vestibular disorders: perilymph fistula
Sample itemA diver has sudden vertigo and hearing loss after a forceful Valsalva during ascent. Pressure applied in the ear canal reproduces vertigo. What is the likely diagnosis?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Perilymph fistula at the round or oval window
Barotrauma can rupture the round or oval window membrane, leaking perilymph and producing vertigo and sensorineural loss. A positive fistula test is typical. It may also follow stapedectomy, and treatment is bed rest with head up, and surgical patching if persistent.
Option by option
A. Perilymph fistula at the round or oval window (correct)
Correct. The history and fistula sign point to perilymph leak.
B. Vestibular neuritis
Neuritis has no hearing loss and no trigger.
C. Meniere disease
Meniere disease is spontaneous and recurrent.
D. Benign paroxysmal positional vertigo
BPPV is positional and not provoked by pressure.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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