Acid-Base Balance and Electrolyte Emergencies

Big Picture

• Acid-base disorders often show up as changes in breathing pattern, mental status, and perfusion.
• Electrolyte problems can cause weakness, arrhythmias, confusion, or seizures.
• On NCLEX, the question is usually not the lab value by itself - it is the symptom that follows it.

High-Yield Connections

• Potassium affects cardiac rhythm and muscle function.
• Calcium affects neuromuscular excitability.
• Sodium affects fluid balance and neurologic status.
• Magnesium affects neuromuscular and cardiac stability.

Safety Cues

• New arrhythmia, muscle weakness, confusion, and tetany are not routine findings.
• If the patient is unstable, prioritize assessment and immediate intervention over waiting for repeat labs.