Prática NBRC RT exam

A 46-year-old woman with influenza pneumonia is not intubated. She is on heated high-flow nasal cannula at 40 L/min with FiO2 0.50, and SpO2 is 91%. Lung ultrasound shows bilateral B-lines and consolidations not explained by effusion. No arterial blood gas is available. Which statement about her oxygenation criterion under the 2023 global ARDS definition is accurate?

• ASpO2/FiO2 is 182, which meets the criterion because SpO2 is 97% or less and flow is at least 30 L/min
• BAn arterial PaO2 is required, because the definition does not accept pulse oximetry values
• CShe cannot meet the definition until she is intubated and receiving PEEP of at least 5 cm H2O
• DSpO2/FiO2 is 182, which does not meet the criterion because the threshold is 150 or less