Read the finding
Respiratory · Pattern recognition
Respiratory failure
4 findings. Cover the answers and work down the list — then flip it and predict the finding from the diagnosis.
Low O2, normal/low CO2 (pneumonia, PE, oedema)Type 1 — high-flow oxygen 94-98%
High CO2 from hypoventilation (COPD, opioids)Type 2 — controlled oxygen 88-92%
COPD with persistent respiratory acidosisType 2 — add NIV (BiPAP)
Cardiogenic pulmonary oedema (type 1)CPAP