Which symptom is more closely associated with Type 2 decompression sickness?

• A. Joint/muscle pain
• B. Mild swelling
• C. Neurological symptoms such as numbness or weakness
• D. Skin marbling

Answer: (C)

Type 2 decompression sickness primarily involves the nervous system and sometimes the cardiopulmonary system. When inert gas bubbles reach the brain or spinal cord, they disrupt neural function, producing symptoms like numbness or weakness, loss of coordination, dizziness, or cognitive changes. These neurological signs indicate central nervous system involvement, which is the hallmark of Type 2. In contrast, joint or muscle pain and mild swelling are typical of Type 1, which affects musculoskeletal and superficial tissues rather than the CNS. Skin marbling can occur with decompression illness but doesn’t specifically indicate CNS involvement. So, neurological symptoms point to the more severe Type 2 form because they reflect direct nervous system impact from the bubbles.