In diving DCS, when does DCS typically occur and what is the standard therapy?

In diving DCS, when does DCS typically occur and what is the standard therapy?

• A. DCS occurs during mission; rapid ascent is recommended.
• B. DCS occurs after mission; chamber treatment is standard.
• C. DCS occurs before mission.
• D. DCS resolves without treatment.

Answer: (B)

DCS most commonly presents after surfacing from a dive, with symptoms often appearing hours later. This happens because nitrogen absorbed under pressure during the dive can come out of solution as bubbles when ambient pressure drops during ascent, leading to joint, skin, neurologic, or chest symptoms. The standard treatment is recompression in a hyperbaric chamber with 100% oxygen. Recompression increases ambient pressure to shrink the gas bubbles and accelerates nitrogen elimination from tissues, while 100% oxygen helps maximize oxygen delivery to tissues and speeds off-gassing. Treatment is guided by established decompression tables to determine the appropriate pressure and duration, and supportive care (rest, hydration) is provided as needed.

DCS most commonly presents after surfacing from a dive, with symptoms often appearing hours later. This happens because nitrogen absorbed under pressure during the dive can come out of solution as bubbles when ambient pressure drops during ascent, leading to joint, skin, neurologic, or chest symptoms.

The standard treatment is recompression in a hyperbaric chamber with 100% oxygen. Recompression increases ambient pressure to shrink the gas bubbles and accelerates nitrogen elimination from tissues, while 100% oxygen helps maximize oxygen delivery to tissues and speeds off-gassing. Treatment is guided by established decompression tables to determine the appropriate pressure and duration, and supportive care (rest, hydration) is provided as needed.