A patient with end-stage renal disease presents to the emergency department with profound, progressive lower extremity weakness after missing two scheduled hemodialysis sessions. An immediate electrocardiogram reveals peaked T waves and a widened QRS complex. Rapid laboratory testing confirms a serum potassium level of mEq/L.
Arrange the following pharmacologic interventions in the correct, priority-based sequential order for the acute management of this patient's life-threatening condition.
- 1Administer intravenous calcium gluconate
- 2Administer intravenous regular insulin and dextrose
- 3Administer enteral sodium zirconium cyclosilicate
Answer
The correct priority sequence is: 1) Intravenous calcium gluconate, 2) Intravenous regular insulin and dextrose, and 3) Enteral sodium zirconium cyclosilicate.
The standard sequence for treating severe hyperkalemia with ECG changes follows three phases: 1) Antagonize the membrane effects to prevent cardiac arrest (Calcium gluconate), 2) Drive extracellular potassium into the cells to rapidly lower serum levels (Insulin + Dextrose), and 3) Remove excess potassium from the body entirely (GI binders like sodium zirconium cyclosilicate).
Step-by-Step Solution
Key Concept
Stepwise pharmacologic management of severe hyperkalemia with electrocardiographic changes.