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  • Title: Transcutaneous bilirubin in exclusively breastfed healthy term newborns up to 12 days of life.
    Author: Draque CM, Sañudo A, de Araujo Peres C, de Almeida MF.
    Journal: Pediatrics; 2011 Sep; 128(3):e565-71. PubMed ID: 21873703.
    Abstract:
    OBJECTIVE: To determine the curve of transcutaneous bilirubin in breastfed term neonates up to 12 days of life. METHODS: In a prospective cohort study, we performed a 12-day evaluation of 223 healthy, exclusively breastfed, appropriate-for-gestational-age neonates who roomed-in for at least 48 hours. Each newborn had forehead transcutaneous bilirubin and body weight measured at the end of 1, 2, 3, 4, 5, 6, 8, 10, and 12 days. Regression analysis was used with bilirubin as a third-degree polynomial function of time. The 25th, 50th, 75th, 90th, and 95th percentile curves were constructed by using the residual mean square for each day. RESULTS: Patients were 46% white, 34% mixed race, and 20% black, the mean birth weight was 3260 g (range: 2560-4090 g), the mean gestational age was 39.4 weeks (range: 37.0-41.9 weeks), 51% were male, 74% were born by vaginal delivery, and 66% had been breastfed since delivery. The mean highest weight loss was 4.7% (range: 1%-12%) at the second or third day, and in most infants the weight returned to the birth weight at the fifth day. With 2007 total bilirubin measurements, bilirubin concentrations reached the 50th percentile level (5.6 mg/dL) at the third and fourth days and returned to the 24-hour level (4.8 mg/dL) at the sixth day. The 95th percentile bilirubin level was 8.2 mg/dL at 24 hours of life, reached 12.2 mg/dL on the fourth day, and declined to 8.5 mg/dL on the 12th day. CONCLUSIONS: The transcutaneous bilirubin curve represents the natural history of bilirubinemia in exclusively breastfed healthy term newborns in the first 12 days of life.
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