K (Potassium)

LABOKLIN Service ID: 29


serum or heparin plasma 0.5 ml




1 day


  • Potassium is the most important intracellular cation.
  • Potassium levels are only significant if the serum has promptly been separated.
  • Pseudohyperkalaemia may occur due to the release of potassium from platelets, leukocytes and erythrocytes. Preanalytically, haemolysis also leads to falsely elevated levels.
  • The main causes of hyperkalaemia are oliguria and Addison’s disease.
  • The main causes of hypokalaemia are vomiting or abomasal reflux, diarrhoea, renal dysfunction, Cushing’s disease/ glucocorticosteroid therapy.
  • Cave: Even in case of absolute potassium deficiency, serum levels may stay within reference range for some time!
  • Cattle: Elevated levels of potassium may lead to reproductive disorders and recumbency if there is a relative sodium deficiency at the same time.