Which of the following is a cause of positive Hennebert's sign-
Ans. is 'a' i.e., Congenital Syphilis False positive fistula test (Hennebert sign)o False positive fistula test refers to a positive fistula test without the presence of a perilymph fistulao It can be due to:-i) Congenital syphilis Stapes footplate is hypermobile, so even small pressure changes in ear cause excessive movement of stapes footplate and excessive stimulation of utricular macula.ii) Meniere's disease (25% of cases) Fibrous bands connecting utricular macula to footplate of stapes.False negative fistula testo False negative fistula test refers to a negative fistula test in the presence of perilymph fistulao Causes are1) Dead labyrinth (dead inner ear)As the labyrinth is dead, there will be no response even if a perilymph fistula is present.2) Cholesteatoma covering the site of fistula It does not allow pressure changes to be transmitted to the labyrinth.
Congenital Syphilis
Fenestrstio0n nsurgery
Cholesteatoma
Dead labyrinth
Assessment of Vestibular Function