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Journal of the Korean Society of Neonatology 2007;14(1):53-58.
Published online May 1, 2007.
Influence of Neonatal Body Surface Area on Decline Rate of Serum Bilirubin Level in Conventional Phototherapy -Neonatal Body Surface Area and the Decline Rate of Serum Bilirubin Level-.
Sang Yoon Lee, Ju Hee Jeon, Ick Jin Song, Byeong Hee Son, Kyun Woo Lee
Department of Pediatrics, Dae-Dong Hospital, Busan, Korea. pedrics@hanmail.net
고식적 광선요법시 신생아 체표면적이 혈청 빌리루빈치 하강속도에 미치는 영향 -신생아 체표면적과 혈청 빌리루빈치 하강속도-
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Abstract
PURPOSE
Neonatal hyperbilirubinemia has benign courses in most cases, but the possibility of toxicity of hyperbilirubinemia required courses examination of every newborn infant to identify the severity of hyperbilirubinemia progress. This study aims to see how the body surface area of newborns influences the decline rate of serum bilirubin level in conventional phototherapy.
METHODS
Based on the charts of the Pediatrics Department, Dae-Dong Hospital from January 2003 to December 2006, we analyzed 168 neonates diagnosed as neonatal hyperbilirubinemia (serum bilirubin > or =15 mg/dL) in retrospective way. We excluded newborn infants under 37 weeks of gestation and under 2,500 g birth weight and classified neonates into four groups by the calculation results of body surface area:males above 75 percentile (group A), males below 25 (group B), females above 75 (group C), and females below 25 (group D).
RESULTS
Out of 168 samples, the number of group A, B, C, D was 30, 20, 20, 15 respectively. In conventional phototherapy, the mean decline rates of serum bilirubin of group B and D recording 2.09 mg/dL/day and 1.77 mg/dL/day, were significantly faster than those of group A and C recording 1.63 mg/dL/day and 1.41 mg/dL/day (P<0.01). No significant differences were found in different duration of phototherapy between groups below 25 percentile and those above 75 in both genders.
CONCLUSION
In conclusion, body surface area influences of infants the decline rate of serum bilirubin level in conventional phototherapy.
Key Words: Body surface areas, Decline rate of serum bilirubin level, Phototherapy
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