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The technique of eustachian tube
Eustachian tube obstruction separates the middle ear cavity from the outside environment, trapping air and creating a negative pressure that pulls the eardrum inward, along with the accumulation of fluid in the middle ear cavity, increasing the pressure, causing the patient to often experience pain and hearing loss. Eustachian tube ventilation is a procedure that pumps air through the tube to help clear the Eustachian tube.
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Cardiology Pediatrics Orthopedics