system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Not a test for Eustachian tube patency ?
assistant
The correct answer is  Ans. is 'a' i.e., Tympanometry Tests for Eustachian tubepatency Valsalva test Methylene blue test Sonotubometry Politzer test Toynbee test Frenzel maneuver Catheterization Inflation - Deflation test