Certified Hyperbaric Technologist Practice Test

What is the primary goal of HBO in treating DCS?

1. To reduce blood flow

2. To eliminate inert gas from the body

3. To increase body temperature

4. To support vascular health

The correct answer is: To eliminate inert gas from the body

The primary goal of hyperbaric oxygen therapy (HBO) in treating decompression sickness (DCS) is to eliminate inert gas from the body. When divers ascend too quickly, nitrogen, which was absorbed into the body at higher pressures, can form bubbles as pressure decreases. HBO therapy involves placing the patient in a hyperbaric chamber where pure oxygen is administered under pressure. The increased pressure helps to reduce the size of nitrogen bubbles and promotes their reabsorption into the bloodstream. This process facilitates the elimination of the inert gases, particularly nitrogen, from the body, thus effectively addressing the underlying issues of DCS. Other options do not accurately reflect the primary objectives of HBO treatment for DCS. Reducing blood flow or increasing body temperature may have effects on various conditions but are not targeted outcomes in the treatment of decompression sickness. Supporting vascular health, while potentially beneficial in some contexts, does not directly address the immediate concern of nitrogen bubble formation that arises in DCS.