Osmosis and Diffusion (Fluids & Electrolytes) integrates university-level fluid, electrolyte, and acid-base nursing with RN practice: pathophysiology, causes, assessment, relevant ECG and lab interpretation, priority interventions, IV/medication management, safety risks, and NCLEX-style case reasoning. Canadian items may reference SI units, Canadian lab reporting, and institutional IV fluid protocols; F&E judgment logic matches NCLEX-RN. Pathway context (RN, Canada). Continue with related lessons from the pathway lesson hub. Learning objectives - Apply pathophysiology, causes, assessment findings, ECG when relevant, labs, priority interventions, medication/IV management, safety risks, NCLEX traps, and case-based reasoning for this topic. - Match fluid tonicity and electrolyte correction rate to the underlying disorder before selecting interventions. - Integrate ABG interpretation and compensation when acid-base balance is in the stem.