Dive Supervisor Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

DCS Type 1, also known as decompression sickness or "the bends," is primarily characterized by the formation of nitrogen bubbles in the body's tissues and fluids due to a rapid ascension after diving. The common symptoms specifically associated with DCS Type 1 include pain, itching, and swelling, particularly in the joints and lymphatic system. This occurs because the nitrogen bubbles can irritate the surrounding tissues and lymph nodes, leading to inflammation and pain.

The symptom of pain is often localized, where divers may experience significant discomfort in their joints, typically resembling the symptoms of arthritis. Itching is also a classic symptom, which is believed to result from the release of inflammatory mediators or from the presence of nitrogen bubbles in the skin or surrounding tissues. Additionally, the swelling of lymph nodes is a response to the body’s attempt to filter out the nitrogen bubbles and manage the resulting inflammation.

Understanding these symptoms is crucial for a dive supervisor, as recognizing DCS Type 1 early can prompt timely treatment, significantly improving outcomes and minimizing potential complications.