Primary Outcome Measures:
- To evaluate the interchangeability of peripheral venous catheter and venipuncture for complete blood count and basic chemistry indices. [ Time Frame: Primary assessment will be done after data analysis of the first 20 participants, estimated to take up to 3 months. ]
Comparisons of complete blood count (including white and red blood cells, hemoglobin, hematocrit, mean corpuscular volume and hemoglobin, red cell distribution width, platelets, mean platelet volume) and basic chemistry indices (including sodium, potassium, glucose, chloride, urea) will be performed and hemolysis will be documented.
Secondary Outcome Measures:
Other: Blood sampling from peripheral venous catheter.
Venipuncture is performed on the opposite limb of the peripheral venous catheter. Within 3 minutes, a second sample is taken from existing peripheral venous catheter used for fluid administration. Intravenous fluids are then stopped for 30 seconds and a tourniquet applied proximal to the device for another 30 seconds. A 2-mL syringe is attached and 0.5 mL of blood aspirated and discarded. Thereafter, 2 mL blood is slowly drawn during about 15 seconds, into a different 2-mL syringe, to allow a gentle pumping action that may reduce vacuum in the syringe and thus hemolysis rates. Afterwards, the intravenous device is flushed with 2 mL normal saline and infusion restarted.
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).
The goal of this study is to investigate whether blood sampling via peripheral venous catheter used for fluid administration can significantly reduces pain and replace venipuncture for determining complete blood count and basic chemistry analytics in infants under 2 years of age.