Certified Hyperbaric Technologist Practice Test

Why is flying after diving considered to pose additional risks for decompression sickness?

1. It increases body temperature

2. It causes further decompression stress

3. It reduces oxygen levels in the body

4. It decreases atmospheric pressure

The correct answer is: It causes further decompression stress

Flying after diving is considered to pose additional risks for decompression sickness primarily because it causes further decompression stress. When a diver ascends to the surface, they go through a controlled decompression process that allows gases absorbed in the body to safely dissipate. If a diver then flies shortly after diving, they are subjected to a rapid decrease in atmospheric pressure due to the altitude of the flight. As the altitude increases, the pressure surrounding the body decreases, which can exacerbate the release of nitrogen that has been absorbed during the dive. This can lead to the formation of nitrogen bubbles within the body, heightening the risk of decompression sickness. Hence, the interaction between the diving environment and the conditions experienced during flying can amplify the potential for complications related to decompression, making it critical for divers to follow recommended surface intervals before flying to mitigate these risks.