(Normal range: 4.32-5.24 mg/dl (1.08-1.3 mmol/L
Comment: Ionized calcium reflects the physiological active function of total calcium. Increased in primary hyperparathyrodism, excess intake of vitamin D ectopic PTH-producing tumors. Elevation maybe seen even when total Ca is normal. Decreased in hypoparathyrodism, vitamin D deficiency and magnesium deficiency
Sample: Heparin, vacationer, send immediately