PADI Divemaster Certification Practice Exam

What is a potential risk if fluids can't fill the middle ear quickly enough during ascent?

1. Increased hearing capability

2. Painful pressure in the ear

3. Spontaneous rupture of the eardrum

4. Balanced pressure in the ear

The correct answer is: Spontaneous rupture of the eardrum

The situation described pertains to the equalization process during a scuba dive, specifically during ascent. As a diver ascends, the pressure in the water decreases, affecting the pressure within the middle ear. If the fluids (typically air) in the middle ear cannot equalize quickly enough to match the reduced pressure outside, this creates a pressure differential. When this pressure differential occurs, the pressure inside the middle ear can become significantly higher than that of the external environment. If the body’s natural mechanisms for equalization (like the Eustachian tube opening to allow air in) fail or are insufficient to balance this pressure, it can lead to discomfort and pain in the ear region. In severe cases, a significant build-up of pressure can result in a spontaneous rupture of the eardrum. This rupture occurs as the eardrum cannot contain the pressure anymore, leading to potential injury and complications, such as hearing loss or infection. Understanding this process highlights the importance of equalization techniques during both descent and ascent while diving. Divers should be vigilant in equalizing their ears regularly to prevent such painful experiences or injury.