Oxygen toxicity, quantified.

Estimate CNS oxygen-toxicity load and pulmonary oxygen toxicity units (OTU) from pressure, time, and oxygen fraction — using the published NOAA / Repex model.

Pressure (ATA)

Time (minutes)

FiO₂ (%)

CNS toxicity

—

of the single-exposure limit

Pulmonary (OTU)

—

oxygen toxicity units this exposure

PO₂ = ATA × FiO₂. CNS % from NOAA single-exposure O₂ limits; OTU via the Repex power-law (PO₂ > 0.5 ATA). Estimate only — clinical protocols include air breaks and physician oversight. · Learn more