title: Umbilical cord blood pH and Apgar scores as an index of neonatal health.
abstract: In an effort to determine the clinical usefulness of Apgar scoring and cord pH in neonatal management, specimens of umbilical cord blood were obtained after 257 of 329 consecutive deliveries at a community-based hospital. A notable number of babies who were born in a vigorous state were in fact acidotic (umbilical arterial pH greater than 1 SD below mean). Seventy-two percent of acidotic babies had an Apgar score greater than 7 at 1 minute, and 92% had an Apgar score greater than 7 at 5 minutes. Correlation coefficients of Apgar scores at 1 and 5 minutes and arterial pH with the health status of newborn infants were poor. A chi 2 analysis of arterial pH and Apgar scores at 1 and 5 minutes indicated that a larger number of sick babies had an Apgar score less than 7 and acidosis than expected by pure chance. However, the sensitivity values of the Apgar score at 1 minute (0.48) and 5 minutes (0.24) and the arterial pH (0.40) for predicting sick children limit the clinical usefulness of these tests. While technically feasible in a community hospital, routine cord pH measurements add little to neonatal evaluation and management.
authors: Department of Family Practice, Malcolm Grow United States Air Force Medical Center, Andrews Air Force Base, Maryland.
authors: B E
authors: BE
authors: Josten
authors: T R
authors: TR
authors: Johnson
authors: J P
authors: JP
authors: Nelson
mesh_terms: D000136:Acid-Base Equilibrium; D000138:Acidosis / Q000175:diagnosis; D001034:Apgar Score; D001238:Asphyxia Neonatorum / Q000175:diagnosis; D005312:Fetal Blood / Q000032:analysis*; D006262:Health; D006304:Health Status; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007231:Infant, Newborn; D011446:Prospective Studies; D013997:Time Factors; D014469:Umbilical Arteries; D014471:Umbilical Veins