The following are the different methods of assessing Eustachian tube patency:
Bedside test: Put some dye/ear drops e.g. chloromycetin in the ear. If the bitter taste in mouth occurs in case of perforation, the tube is patent.
Eustachian tube catheterization
– During the ostoscopy, patient is asked to swallow with closed nose and mouth, thus creating a negative pressure causing retraction of TM if the tube is patent.
-Politzer ‘s bag with nozzle is inserted into the nostril and both nostrils are compressed
The patient takes a sip of water in his mouth and is asked to swallow
Press the bag as he swallows and air enter the middle ear with the feeling of popping up sensation
By injecting radio-opaque dye and xray
Eustachian tube endoscopy
-Close the mouth and the nose →Move the togue up to the palate → One can hear the click and movement of TM can be appreciated if ET is patent.