80% Oxygen during Surgery?

High FiO2 is recommended by the WHO to reduce surgical infections. Concern exists however re the growing evidence of the potential harms and adverse or worse outcomes from too much oxygen in many settings like MI, stroke, lung injury, brain injury and ACLS leading to important recommendations to limit oxygen based on adequate SpO2 values. ( blog link ) This current paper fails to find harm from high FiO2 in terms of atelectasis, cardiovascular events, ICU admission or death.

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Numerous critiques of the WHO recommendation exist eg.

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