Mixed Acid Base Disorders (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. US NCLEX-RN items test fluid compartment shifts, IV fluid tonicity, electrolyte emergencies, ABG interpretation, compensation, and priority nursing actions in management-of-care vignettes. Pathway context (RN, United States). 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.