Eustachian tube function is best assessed by:
High-Yield Explanation
Ans: A. Tympanometry(Ref Dhingra 7/e p62-63, 6/e p59)Assessment of eustachian tube function:Tympanometry & Politzer test.Tympanometry better than Politzer test.Tympanometry:Positive & negative pressures created in external ear canal.Patient swallows repeatedly.Normal tubal function:Ability of tube to equilibrate positive & negative pressures to ambient pressure.Done both in patients with perforated or intact tympanic membrane.