What is defined as the extracorporeal elimination of undissolved gas from body fluids?

The term that refers to the extracorporeal elimination of undissolved gas from body fluids is decompression. This process is necessary in medical scenarios, particularly in cases such as decompression sickness, where nitrogen bubbles formed in the body's tissues must be eliminated from the bloodstream to prevent serious complications. Decompression typically involves the use of specialized equipment, such as hyperbaric chambers, or procedures that create a controlled environment to safely expel the gas from the body.

In this context, dehydration refers to the loss of water from the body rather than gas elimination. Detoxification pertains to the removal of toxins or harmful substances from the body, not specifically the removal of gases. Filtration usually involves the separation of particles from fluids, such as blood filtration, but it does not specifically address the removal of undissolved gas. Thus, the most appropriate choice that directly relates to the extracorporeal elimination of gas is decompression.