title: Correlation between umbilical cord hemoglobin and rate of jaundice requiring phototherapy in healthy newborns.
abstract: BACKGROUND
  Delay of umbilical cord clamping by at least 1 min is recommended for newborns not requiring resuscitation in the International Liaison Committee On Resuscitation-Consensus on Science with Treatment Recommendations (ILCOR-CoSTR) 2010 guidelines. The delay in clamping improves iron status through early infancy but may increase the likelihood of jaundice requiring phototherapy. The present study investigated the relationship between umbilical cord hemoglobin and the rate of jaundice requiring phototherapy in healthy Japanese newborns.
  
  
  METHODS
  Cord hemoglobin was measured in healthy newborns and the rate of infants receiving phototherapy for jaundice and other data were obtained from medical records.
  
  
  RESULTS
  Jaundice requiring phototherapy mostly occurred in association with high cord blood hemoglobin, which is increased by delayed cord clamping.
  
  
  CONCLUSIONS
  Higher cord hemoglobin may increase neonatal jaundice in newborns in Japan, therefore the present results support the Japan Resuscitation Council guideline 2010, which does not recommend delay of umbilical cord clamping by at least 1 min, in contrast to the ILCOR guidelines.
authors.affiliation: Department of Pediatrics, St Luke's International Hospital, Tokyo, Japan.
authors.forename: Machiko
authors.initials: M
authors.lastname: Nakagawa
authors.affiliation: Department of Pediatrics, St Luke's International Hospital, Tokyo, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Ishida
authors.affiliation: Department of Pediatrics, St Luke's International Hospital, Tokyo, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Nagaoki
authors.affiliation: Department of Developmental Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan.
authors.forename: Hidenobu
authors.initials: H
authors.lastname: Ohta
authors.affiliation: Department of Pediatrics, St Luke's International Hospital, Tokyo, Japan.
authors.forename: Rinshu
authors.initials: R
authors.lastname: Shimabukuro
authors.affiliation: Department of Pediatrics, St Luke's International Hospital, Tokyo, Japan.
authors.forename: Michio
authors.initials: M
authors.lastname: Hirata
authors.affiliation: Department of Integrated Women's Health, St Luke's International Hospital, Tokyo, Japan.
authors.forename: Michiko
authors.initials: M
authors.lastname: Yamanaka
authors.affiliation: Department of Pediatrics, St Luke's International Hospital, Tokyo, Japan.
authors.forename: Isao
authors.initials: I
authors.lastname: Kusakawa
mesh_terms: D005260:Female; D005312:Fetal Blood / Q000378:metabolism*; D005500:Follow-Up Studies; D006454:Hemoglobins / Q000378:metabolism*; D006801:Humans; D015994:Incidence; D007231:Infant, Newborn; D007564:Japan / Q000453:epidemiology; D007567:Jaundice, Neonatal / Q000097:blood* / Q000453:epidemiology / Q000628:therapy; D008297:Male; D010789:Phototherapy / Q000379:methods*; D012016:Reference Values; D012189:Retrospective Studies; D013997:Time Factors; D014470:Umbilical Cord
chemical_list: D006454:Hemoglobins
keywords: delayed umbilical cord clamping; neonatal jaundice; newborn; phototherapy