PT - JOURNAL ARTICLE AU - Markowitz, Morri E. AU - Weinberger, Howard L. TI - Immobilization-Related Lead Toxicity in Previously Lead-Poisoned Children DP - 1990 Sep 01 TA - Pediatrics PG - 455--457 VI - 86 IP - 3 4099 - http://pediatrics.aappublications.org/content/86/3/455.short 4100 - http://pediatrics.aappublications.org/content/86/3/455.full SO - Pediatrics1990 Sep 01; 86 AB - In the late 1970s more than half a million children younger than 7 years of age had elevated blood lead concentrations (>1.45 µmol/L, or 30 µg/dL, the clinical cutoff for an elevated lead level at that time.1 Despite a declining incidence of new cases since then, a large reservoir of previously exposed children must exist. (Sedlis M. 1989. Personal communication). More than two thirds of a child's lead burden is contained in the skeleton.2 In one experimental model, a small fraction of the bone lead content is in a readily exchangeable pool with blood and soft tissues.3 The majority of the lead in bone is believed to be metabolically inert in most circumstances.