Hyperbaric Oxygen Therapy (HBOT) Practice Exam

In HBOT, a patient inhales what percent of oxygen in what type of chamber?

21% oxygen in a standard chamber 100% oxygen at sea level pressure 50% oxygen in a pressurized chamber 100% oxygen in a pressurized chamber that is higher than normal atmosphere

Correct Answer:

100% oxygen in a pressurized chamber that is higher than normal atmosphere

Explanation:

Hyperbaric oxygen therapy relies on delivering pure oxygen under pressure greater than atmospheric pressure to markedly increase the amount of oxygen dissolved in blood and tissues. In this setting, a patient breathes 100% oxygen inside a chamber that is pressurized above normal atmosphere. That combination—100% O2 plus elevated pressure—drives higher tissue oxygen tension and supports healing and recovery. In monoplace chambers the chamber itself is filled with 100% oxygen at high pressure, while in multiplace chambers the chamber is pressurized with air but the patient still receives 100% oxygen via a hood or mask at the same elevated pressure. The other options describe breathing ambient air, lower oxygen percentages, or sea-level pressure, which do not constitute HBOT.

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