Which of the following is NOT a type of decompression sickness (DCS)?

Decompression sickness (DCS) occurs when a diver ascends too quickly, leading to nitrogen bubbles forming in the body due to reduced pressure. Understanding the types of DCS helps identify risks associated with diving.

Arterial Gas Embolism (AGE) is a serious condition that can result from a rapid ascent when nitrogen bubbles enter the arterial circulation. This condition is well recognized as a type of DCS because it directly involves gas bubbles affecting blood flow.

The choice indicating Tension Pneumothorax is not a type of decompression sickness. A tension pneumothorax is a medical emergency involving air trapped in the pleural space, which compresses the lungs and can occur due to trauma, certain medical conditions, or improper breathing techniques during diving, but it is not classified as DCS.

Cardiopulmonary symptoms can occur as part of DCS, often result from gas bubbles affecting the heart and lungs. Mediastinal emphysema involves air in the mediastinum and is also associated with diving injuries but can occur due to other causes as well. Both of these conditions fit within the spectrum of decompression sickness symptoms.

Understanding these distinctions is critical for divers and dive supervisors to identify the risks associated with diving and respond