Antepartum computerized CTG and neonatal acid-base status at birth.
OBJECTIVE
To assess the correlation between individual computerized cardiotocography (cCTG) variables and acid-base status at birth before the first breathing in uncomplicated term pregnancy delivered by cesarean section.


METHODS
A retrospective cohort study.


METHODS
Seventy singleton normal pregnancies delivered by elective cesarean section. The last antepartum cCTG performed within 4 h from delivery by the System 8002 (Oxford Sonicaid, UK) was correlated to umbilical blood gas analysis (UBGA) values (AVL compact 2 analyser). Considering blood gas analysis values as dependent and individual cCTG parameters as independent variables the best regression subsets followed by a backward stepwise linear regression was used.


RESULTS
There was no significant correlation of cCTG parameters with any of the values of blood gas analysis. However, when neonatal conditions, as expressed by arterial pH > 7.20, Becf > - 4.0 mmol/l and Apgar score at 5 min > 7, were taken as an end-point, they could be predicted by Acc15 and FM/hour (sensitivity: 35%, positive predictive value: 92%, cut-off > 7 and 67%, 92%, > 21, respectively).


CONCLUSIONS
In uncomplicated pregnancies, the prospect of a vigorous newborn seems particularly associated with the presence of Acc > 15 and FM/hour > 21.
Anceschi
M M
MM
Second Institute of Gynecology and Obstetrics, La Sapienza University, Rome, Italy. perinat@flashnet.it
Piazze
J J
JJ
Vozzi
G
G
Ruozi Berretta
A
A
Figliolini
C
C
Vigna
R
R
Cosmi
E V
EV
D000136:Acid-Base Equilibrium / Q000502:physiology*; D000328:Adult; D000773:Anesthesia, Obstetrical; D015148:Cardiotocography / Q000379:methods*; D002585:Cesarean Section; D015331:Cohort Studies; D003936:Diagnosis, Computer-Assisted; D005260:Female; D005312:Fetal Blood / Q000737:chemistry*; D006340:Heart Rate, Fetal / Q000502:physiology; D006801:Humans; D007231:Infant, Newborn; D016014:Linear Models; D016343:Monitoring, Intraoperative; D011237:Predictive Value of Tests; D011247:Pregnancy; D011256:Pregnancy Outcome; D011263:Pregnancy Trimester, Third; D011296:Prenatal Diagnosis / Q000379:methods; D012189:Retrospective Studies; D012680:Sensitivity and Specificity