Abstract
To determine the ability of capillary blood lead levels to accurately reflect true blood lead levels in children at risk for lead poisoning. A correlation study in which lead levels of capillary blood specimens obtained by four different methods were compared with lead levels of simultaneously drawn venous blood specimens. A central-city pediatric primary care clinic and door-to-door home visits in one central-city neighborhood. Two hundred ninety-five children at high risk for lead poisoning aged 6 months to 6 years. Blood lead levels of simultaneously drawn capillary and venous blood specimens. Lead levels of all four capillary sampling methods were highly correlated (correlation coefficient > or = 0.96) with matched venous blood lead levels, with mean capillary-venous differences less than 0.05 mumol/L (1 microgram/dL). Capillary sampling is an acceptable alternative to venipuncture for lead-poisoning screening in young children.
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