Blood hemoglobin is measured daily in clinical practice. Laboratory measurement (Lab-Hb) of is the gold standard for assessment of blood hemoglobin. Recently, non-invasive monitors had been introduced. Non-invasive measurement of hemoglobin (Sp-Hb) would save time and minimize the risk of infection. Blood sampling in children is usually more difficult and stressful; moreover, it also carries the risk of iatrogenic anemia.