What describes CNS involvement in DCS?

What describes CNS involvement in DCS?

• A. N2 bubbles trapped in brain or against the spinal cord; common symptoms include visual disturbances, headaches, partial paralysis, the inability to hear or speak, and loss of orientation
• B. N2 bubbles in joints
• C. N2 bubbles in lungs causing cough
• D. N2 bubbles along nerve tracts causing paresthesia

Answer: (A)

When decompression sickness affects the central nervous system, nitrogen bubbles form in or migrate to the brain and spinal cord. These bubbles obstruct vessels and trigger local inflammation, leading to neurologic deficits. That’s why CNS involvement presents with symptoms like visual disturbances, headaches, partial paralysis or weakness, speech or hearing difficulties, and loss of orientation—signs that originate from brain or spinal cord dysfunction rather than from joints or lungs. Bubbles trapped in joints cause musculoskeletal pain and limited movement, not central neurologic signs. Bubbles in the lungs produce pulmonary symptoms such as cough and chest tightness. Bubbles along nerve tracts can cause paresthesias, but that reflects peripheral or localized nerve involvement rather than the brain/spinal cord dysfunction characteristic of CNS DCS. So the description of nitrogen bubbles in the brain or around the spinal cord with the listed neurologic symptoms best describes CNS involvement.

When decompression sickness affects the central nervous system, nitrogen bubbles form in or migrate to the brain and spinal cord. These bubbles obstruct vessels and trigger local inflammation, leading to neurologic deficits. That’s why CNS involvement presents with symptoms like visual disturbances, headaches, partial paralysis or weakness, speech or hearing difficulties, and loss of orientation—signs that originate from brain or spinal cord dysfunction rather than from joints or lungs.

Bubbles trapped in joints cause musculoskeletal pain and limited movement, not central neurologic signs. Bubbles in the lungs produce pulmonary symptoms such as cough and chest tightness. Bubbles along nerve tracts can cause paresthesias, but that reflects peripheral or localized nerve involvement rather than the brain/spinal cord dysfunction characteristic of CNS DCS. So the description of nitrogen bubbles in the brain or around the spinal cord with the listed neurologic symptoms best describes CNS involvement.