What is the primary focus of the treatment for decompression illness?

The primary focus of the treatment for decompression illness is to remove nitrogen bubbles from the bloodstream. When a diver ascends too quickly, nitrogen, which is absorbed by the body under pressure, can form bubbles as the pressure decreases. These bubbles can obstruct blood flow, cause tissue damage, and lead to various symptoms associated with decompression sickness.

The treatment often involves administering pure oxygen to the diver in a hyperbaric chamber. This method helps in dissolving the nitrogen bubbles back into the bloodstream and facilitating their elimination from the body. The process reduces the size of the bubbles and allows for safer and more effective elimination through respiration.

In contrast to other options, while increasing blood oxygen levels and relieving pressure on joints can be benefits during treatment, they are not the primary focus. Stabilizing the diver's position in the water is also not a main concern when addressing decompression illness itself, as the critical action is to safely reduce the nitrogen bubbles in the system.