Q: Give at least 7 reasons of pseudo-hyperkalemia?

Answer:

1. Excessive vacuum of the blood draw (hemolysis)
2. A collection needle that is of too fine a gauge (hemolysis)
3. Excessive tourniquet time or fist clenching during phelobotomy, which leads to efflux of potassium from the muscle cells.
4. A delay in the processing of the blood specimen.
5. Thrombocytosis (Platelet count >500,000/mm³), 
6. Leucocytosis  (WBC count > 70 000/mm³), 
7. Erythrocytosis (hematocrit > 55%).