title: Relationship between the sonographic pattern of intrauterine growth restriction and acid-base status at the time of cordocentensis.
abstract: OBJECTIVE
  To determine whether there is a difference in acid-base status at the time of cordocentesis between fetuses with symmetric and asymmetric intrauterine growth restriction (IUGR).
  
  
  METHODS
  Non-anomalous singleton fetuses with IUGR who underwent fetal blood sampling for rapid karyotype analysis from 1992-1995 were retrospectively identified. Cases with gestational age <24 weeks, abnormal karyotype, or evidence of congenital infection were excluded. Fetuses were divided into two groups based on Head Circumference/ Abdominal Circumference Ratio (HC/AC). The asymmetric-IUGR group had HC/AC > or = 95% tile for GA, and the symmetric-IUGR group had HC/AC <95% tile. GA adjusted values of umbilical venous pH, pCO2, pO2, HCO3, hemoglobin and reticulocyte count were calculated by subtracting the mean values for GA from the observed and compared between groups.
  
  
  RESULTS
  Both symmetric-IUGR (n = 7) and asymmetric-IUGR (n = 9) had umbilical venous pH and pO2, levels lower than GA normative values. However, there were no differences between groups for any of the parameters studied.
  
  
  CONCLUSIONS
  Fetuses with symmetric and asymmetric IUGR due to UPI display a similar degree of acid-base impairment.
authors.affiliation: Department of Obstetrics and Gynecology, Hutzel Hospital, Wayne State University, Detroit, MI 48201, USA.
authors.forename: S C
authors.initials: SC
authors.lastname: Blackwell
authors.forename: J
authors.initials: J
authors.lastname: Moldenhauer
authors.forename: M
authors.initials: M
authors.lastname: Redman
authors.forename: S S
authors.initials: SS
authors.lastname: Hassan
authors.forename: H M
authors.initials: HM
authors.lastname: Wolfe
authors.forename: S M
authors.initials: SM
authors.lastname: Berry
mesh_terms: D000136:Acid-Base Equilibrium; D001639:Bicarbonates / Q000097:blood; D002245:Carbon Dioxide / Q000097:blood; D017218:Cordocentesis; D005260:Female; D005312:Fetal Blood / Q000737:chemistry; D005317:Fetal Growth Retardation / Q000000981:diagnostic imaging*; D005865:Gestational Age; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007621:Karyotyping; D010100:Oxygen / Q000097:blood; D011247:Pregnancy; D016216:Ultrasonography, Prenatal
chemical_list: D001639:Bicarbonates; D002245:Carbon Dioxide; D010100:Oxygen