6James L S, Weisbrot I M, Prince C E, et al. The Acid-BaseStatus of Human Infants in Relation to Birth Asphyxia and the Onset of Respiration[J ]. J Pediatr, 1958, 52(4):379-394.
7Fetus C O. American Academy of Pedaitrics,and Committee on Obstetric Practice, American College of Obetetricians and Gynecologists.Use and Abuse of the Apgar Score[ J ]. Pedi- attrics, 1996, 98(1):ldl-ld2.
8Kotaska K, Urinovska R, Klapkova E, et al. Re-Evaluation of Cord Blood Arterial and Venous Reference Ranges for pH, pO2, pCO2, According to Spontaneous or Cesarean De- livery[J ]. J Clin Lab Anal, 20t0, 24(5):300-304.
9Thorp J A, Rushing R S. Umbilical Cord Blood Gas Analysis [J ]. Obstet Gynecol Clin North Am, 1999, 26(4):695-709.
10I Longo L D, Bartels H. Respiratory Gas Exchange and Blood Flow in the Placenta [M]. Bethesda: National Institute of Child Health and Human Development, 1972:402-405.
