Pseudohyperkalemia: A Critical Nursing Alert in Clinical Practice

Abstract

Pseudohyperkalemia is a laboratory artifact characterized by falsely elevated serum potassium levels due to in vitro release of potassium during or after blood collection. It is a clinically significant issue that may lead to misdiagnosis and inappropriate treatment if not recognized promptly. This article explores the causes, mechanisms, and clinical implications of pseudohyperkalemia, with a special emphasis on nursing responsibilities and alerts during blood sampling and patient care. Key causes include hemolysis, prolonged tourniquet application, fist clenching, thrombocytosis, leukocytosis, and improper sample handling. Clinical differentiation from true hyperkalemia relies on the absence of symptoms, normal electrocardiographic findings, and inconsistency with the patient's condition. Nurses play a vital role in minimizing pre-analytical errors by adhering to proper venipuncture techniques, ensuring appropriate sample handling, and recognizing suspicious laboratory results. The findings highlight that improved nursing awareness and adherence to evidence-based practices can significantly reduce the incidence of pseudohyperkalemia. Incorporating nursing alerts into routine clinical practice enhances patient safety, prevents unnecessary interventions, and promotes accurate clinical decision-making.