Otitic barotrauma results due to:
Correct Answer: Descent in air
Description: Ans. B Descent in air Ref. Dhingra 5th/ed p 74, 6th/ed p 66 Otitic Barotrauma: It this condition, Eustachian tube fails to mantain middle ear pressure at ambient atmospheric level Etiology: Rapid descent during airflight Underwater diving Compression in pressure chamber. Mechanism When middle ear pressure rises | Normal eustachian tube | Allows passage of air from middle ear to pharynx | In case if atmospheric pressure is more than middle ear pressures by > 90 mmhg | Locking of eustachian tube | Sudden negative pressure in middle ear | Retraction of tympanic membrane, hyperemia, transudation with haemorrhage | Aero otitis media Clinical Features Severe earache, deafness, tinnitus, veigo. On examination - Tympanic membrane is retracted, congested or there may be effusion in middle ear. Conductive type of hearing loss is present. Precautions Avoid traveling during upper respiratory infection. Avoid sleep during descent. Do Valsalva or swallowing or yawning during descent of flight. Treatment Middle ear ventilation should be restored by decongestants, catheterization or even myringotomy.
Category:
ENT
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now