Validity of Transcutaneous Bilirubin Monitoring in Preterm Infants

TcB measurements will be obtained within approximately 30 minutes of the TSB being drawn before initiation of phototherapy, approximately 24 hours after the initiation of phototherapy and approximately 24 hours after completion of phototherapy. The TcB measurement will involve lightly pushing three times at each site which will yield an average transcutaneous bilirubin value. This will be calculated for the interscapular, buttock and sternal automatically by the bilirubinometer. While on phototherapy a measurement of the diapered, non-exposed buttock area will be obtained at approximately 24 hours to coincide with the standard of care serum bilirubin measurement.