At what atmosphere pressure gradient barotraumatic otitis media occurs:
ExplanationB. On the descent, as pressure builds up between the ear canal, TM, and the nasopharynx, the Eustachian tube should function to equalize this. However, if the pressure gradient exceeds 30mm, pain will ensue. At 90mmHg gradient, the Eustachian tube cannot open, and TM hemorrhage and rupture may occur.
