Electrolyte Emergency Patterns

Two electrolyte patterns demand especially fast recognition. Excess potassium destabilizes the electrical activity of cardiac muscle; falling sodium draws water into brain cells and can produce cerebral edema. The number matters, but it is not the whole emergency: the ECG, neurological findings, speed of onset, kidney function, and rate of correction determine what comes first. When potassium is dangerous, the sequence is to protect the myocardium, move potassium temporarily into cells, and then remove it from the body. When sodium is dangerously low, the immediate goal is to relieve severe neurological symptoms without correcting so quickly that osmotic demyelination occurs. A patient with chronic hyponatremia may be harmed by a treatment that would be appropriate for a rapid, symptomatic sodium fall. For an RPN in Canada, assessment, monitoring, preparation, and escalation must remain within provincial scope and the employer's policy, authorized order, or medical directive. Ontario's 2024 Advanced Life Support Patient Care Standards provide one Canadian protocol example and clarify a salbutamol dose for hyperkalemia; they do not replace the requirements of the RPN's own practice setting. A potassium result...