Diagnostic test monitoring (ABGs, CBC, chemistry panels, INR)
Expect normal-range recognition and trend interpretation: ABG (pH 7.35–7.45, PaCO2 35–45, HCO3 22–26, PaO2 80–100), CBC (Hgb, WBC, platelet thresholds for risk), BMP/CMP (sodium, potassium, BUN/creatinine, glucose), INR (target 2–3 for most warfarin indications, 2.5–3.5 for mechanical valves). Critical values require provider notification.
Pitfall: Candidates pick the closest-to-normal answer instead of the most clinically significant abnormal — NCSBN wants the value that drives action.