In septic shock, what is the rationale for early oxygen therapy?

• A. Stabilizes oxygen delivery to organs.
• B. Worsens perfusion.
• C. Causes sedation.
• D. Not necessary.

Answer: (A)

The importance lies in ensuring adequate oxygen delivery to tissues to prevent cellular hypoxia in septic shock. In this condition, perfusion can be erratic and mitochondria may not extract oxygen efficiently, so tissues are at high risk for hypoxia and anaerobic metabolism. Providing oxygen early increases the amount of oxygen carried in the blood and delivered to organs, helping to maintain cellular respiration, reduce lactic acidosis, and support organ function while other treatments (fluids, vasopressors, antibiotics) are initiated. The idea isn’t that oxygen worsens perfusion or has other downsides in the short term; it’s about stabilizing oxygen delivery to prevent further tissue injury. Oxygen therapy isn’t unnecessary in septic shock when hypoxemia or risk of hypoxia is present, and it does not cause sedation.