Q: At what level of WBC, Platelet and Hematocrit count,  pseudohyperkalemia is expected

Answer: Pseudohyperkalemia is usually a laboratory artifact rather than a real biological abnormality.

Beside common causes of pseudohyperkalemia like hemolysis, excessive tourniquet time or a delay in the processing of the blood specimen, it can also occur in specimens from patients with abnormally high numbers of

• platelets (>500,000/mm³),
• leukocytes (> 70 000/mm³), or
• erythrocytes (hematocrit > 55%)