Which therapy is considered definitive potassium removal but is not first-line due to time delay?

Which therapy is considered definitive potassium removal but is not first-line due to time delay?

• A. Inhaled Beta-Agonist
• B. Kayexalate
• C. Hemodialysis
• D. IV Calcium Gluconate

Answer: (C)

Definitive removal of potassium from the body is achieved by hemodialysis, which physically clears potassium from the blood. It isn’t used first-line in acute hyperkalemia because setting up dialysis takes time and resources, so there’s a delay before it can be started. In the meantime, other measures are used to protect the heart and move potassium into cells or bind it in the gut. Calcium gluconate stabilizes the heart but doesn’t lower potassium levels. Insulin with glucose, and beta-2 agonists like albuterol, shift potassium into cells temporarily. Kayexalate binds potassium in the gut but acts slowly and isn’t reliable for urgent removal. Thus, dialysis is considered the definitive method for removing potassium, reserved for when rapid elimination is needed or when other treatments aren’t sufficient.

Definitive removal of potassium from the body is achieved by hemodialysis, which physically clears potassium from the blood. It isn’t used first-line in acute hyperkalemia because setting up dialysis takes time and resources, so there’s a delay before it can be started. In the meantime, other measures are used to protect the heart and move potassium into cells or bind it in the gut. Calcium gluconate stabilizes the heart but doesn’t lower potassium levels. Insulin with glucose, and beta-2 agonists like albuterol, shift potassium into cells temporarily. Kayexalate binds potassium in the gut but acts slowly and isn’t reliable for urgent removal. Thus, dialysis is considered the definitive method for removing potassium, reserved for when rapid elimination is needed or when other treatments aren’t sufficient.