Key Concepts
Introduction
Scenario setup A client with HF develops orthopnea and frothy sputum. RR 32/min, SpOโ 86% on 5 L, BP 190/110 mmHg, HR 122/min, crackles bilaterally. This is acute pulmonary edema / severe HF decompensation until treated. Priorities: oxygen, positioning, IV access, medications per order (e.g., diuretics, nitroglycerin), and continuous monitoring. Canada RN: choose urgent interventions over routine tasks; use metric values carefully. This case-study format is intentional: boards reward trajectory thinkingโwhat changed, what is unstable, and what you do next for the role named in the stem. For NCLEX-RN (Canada), read the assignment line before you eliminate answers. Slow read: re-scan the stem for vitals trends, oxygen settings, allergies, and time since onsetโcase items often hide the decisive clue in a single line. On the exam, writers often pair stable-sounding options with unstable dataโnotice the mismatch before you commit. If the stem names a license or role, reread that line; scope errors are classic trap answers even when the clinical topic is familiar. Run a 60-second scan: breathing work and oxygenation, perfusion and end organs, neuro baseline, likely infection sources,...