Causes of Hyperkalemia in Hemodialysis Patients

Hemodialysis is not a disease—it is a modern medical procedure. Patients who rely on this treatment to survive actually suffer from a condition called “uremia.” So, what causes hyperkalemia (elevated blood potassium levels) in hemodialysis patients? Below, we address this question.

Causes of Hyperkalemia in Hemodialysis Patients

1. Excessive Potassium Intake: Typically, patients with end-stage renal disease lose the kidney’s ability to excrete potassium. During the interdialytic interval, consuming potassium-rich foods—such as fruits, seafood, and vegetables—can lead to hyperkalemia.

2. Concurrent Infection: Systemic or localized infections accelerate tissue and cellular catabolism, thereby increasing serum potassium levels. Similarly, trauma or surgical procedures may also predispose patients to hyperkalemia and thus warrant close attention.

3. Medication Effects: Patients with chronic kidney disease often take antihypertensive agents such as ACE inhibitors (ACEIs) or angiotensin receptor blockers (ARBs). These medications can impair potassium excretion and elevate serum potassium levels. Therefore, in uremic patients—especially those with a history of hyperkalemia—potassium-retaining drugs should be avoided whenever possible.

4. Inadequate Dialysis: Due to the high cost of dialysis, some patients undergo irregular treatments—sometimes only once per week or even just one to two sessions per month—because of financial constraints. Such suboptimal dialysis significantly increases the risk of hyperkalemia.

The above outlines the primary causes of hyperkalemia in hemodialysis patients. We hope this information is helpful to you.