Certified Hyperbaric Technologist Practice Test

What can cause otic barotrauma?

1. Only diving at excessive depths

2. Swelling in the eustachian tube due to allergies or an upper respiratory infection

3. Infections in the outer ear

4. Rapid ascents without equalization

The correct answer is: Swelling in the eustachian tube due to allergies or an upper respiratory infection

Otic barotrauma occurs when there is a discrepancy between the pressure in the middle ear and the external environment. This pressure difference can lead to damage to the structures of the ear. Swelling in the eustachian tube, often caused by allergies or an upper respiratory infection, can restrict the normal function of the tube, which is responsible for equalizing pressure in the ear. When the eustachian tube does not open properly, it prevents air from entering the middle ear during changes in external pressure, leading to a buildup of negative pressure and potential barotrauma. Understanding the underlying mechanisms of otic barotrauma emphasizes the importance of maintaining clear eustachian tubes for safe diving practices. Proper equalization techniques and addressing any underlying conditions such as allergies can help mitigate the risks of otic barotrauma during pressure changes in diving or flying situations.