Multiple venipunctures in hospitalized children result in physical and emotional distress. Recently, we have found that blood sampling via peripheral venous catheter used for fluid administration in children significantly reduces pain and, except for glucose, can replace venipuncture for determining complete blood count and basic chemistry analytics, including white and red blood cell counts, hemoglobin and hematocrit levels, mean corpuscular volume, mean corpuscular hemoglobin level, red blood cell distribution width, platelet count, mean platelet volume, and sodium, potassium, chloride, and urea levels (Berger-Achituv S, Budde-Schwartzman B. Ellis MH, Shenkman Z. Erez I. Blood Sampling through Peripheral Venous Catheters for Selected Basic Analytes in Children. Pediatrics. In press).