Transcutaneous bilirubinometry in the newborn infant: state of the art.

Hyperbilirubinemia in the newborn infant continues to challenge physicians. Clinical evaluation and treatment have evolved well-established principles over the past decade. This review examines neonatal bilirubin metabolism and focuses on a recently developed clinical diagnostic tool, the transcutaneous bilirubinometer. In spite of some limitations, the transcutaneous bilirubinometer can be best applied as a screening tool to identify healthy full-term infants who require serum bilirubin determination. With proper application, this device can eliminate most invasive diagnostic testing. Optimal use of the instrument requires the relationship between the serum bilirubin concentration and the transcutaneous bilirubinometer index to be determined for each device, institution, and population.