title: Effect of position changing on bilirubin levels during phototherapy.
abstract: OBJECTIVE
  Turning of infants during phototherapy for hyperbilirubinemia is practiced in many nurseries. However, there is little research evidence in support of this practice. This study examined the effect of turning on serum total bilirubin concentration and on the duration of phototherapy.
  
  
  METHODS
  We first conducted a pilot study in term infants requiring phototherapy using transcutaneous bilirubinometry in order to determine the time required to clear the skin of bilirubin. This "blanching time" was found to be approximately 150 minutes. We then conducted a randomized study comparing turning the baby during phototherapy with care in the supine position only.
  
  
  RESULTS
  Thirty term infants were enrolled in the study (turned - 14; supine - 16). No differences were found between the groups in baseline data, such as birth weight, gestational age, age at start of phototherapy, or type of feeds. Infants in the supine group showed a significantly larger drop in serum total bilirubin concentration and required a shorter duration of phototherapy.
  
  
  CONCLUSIONS
  We conclude that infants should be nursed supine during phototherapy. Based on these results, we propose a modification to the traditional model of bilirubin kinetics during phototherapy.
authors.affiliation: Kaplan Medical Center, Rehovot, Israel.
authors.forename: E S
authors.initials: ES
authors.lastname: Shinwell
authors.forename: Y
authors.initials: Y
authors.lastname: Sciaky
authors.forename: M
authors.initials: M
authors.lastname: Karplus
mesh_terms: D001663:Bilirubin / Q000097:blood*; D001942:Breast Feeding; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010789:Phototherapy / Q000379:methods*; D016683:Supine Position
chemical_list: D001663:Bilirubin