Which gas condition results from holding your breath while on compressed air?

Holding your breath during ascent while using compressed air can lead to serious gas-related conditions, particularly pneumothorax and air embolism.

When a diver ascends without exhaling, the air in their lungs expands due to decreasing pressure. This expansion can cause the lungs to overinflate and potentially rupture, leading to pneumothorax, where air escapes into the chest cavity, causing difficulty in breathing and other serious complications.

Simultaneously, if the expanding air creates high pressure in the pulmonary vessels, it can result in an air embolism. This occurs when air bubbles enter the bloodstream and can travel to vital organs, such as the brain or heart, causing severe and potentially life-threatening issues.

Thus, both pneumothorax and air embolism are conditions that directly relate to the consequences of holding your breath while diving, making that answer the most comprehensive and accurate choice regarding the dangers associated with breath-holding during ascent.