[Application of intrapartum fetal oxygen saturation rate monitoring].
OBJECTIVE
To study the accuracy of the application of the intrapartum fetal oxygen saturation (FSO2) monitoring in predicting fetal acidosis and diagnosing intrauterine fetal distress.


METHODS
Continuous FSO2 monitoring as well as internal and external fetal heart rate monitoring were applied respectively in 60 women in labor during active phase of the first stage and the second stage. All the monitoring methods were validated with standard sensitivity, specificity, positive predictive value, negative predictive value, and accuracy on the bases of Apgar score and cord artery blood analysis.


RESULTS
The mean FSO2 in the active phase of the first stage were significantly higher than in the second stage of labor. FSO2 correlated with pH, PO2, PCO2, and base excess (BE) of cord blood to a significant degree. There was linear correlation between FSO2 and cord artery blood pH. Using 30% cutoff diagnosing intrauterine fetal distress, the sensitivity, specificity, and accuracy were 80%, 100% and 98.3%, respectively.


CONCLUSIONS
FSO2 monitoring is an effective method diagnosing intrauterine fetal distress.
Han
Feng-zhen
FZ
Department of Obstetrics and Gynecology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
Bian
Xu-ming
XM
Gai
Ming-ying
MY
Liu
Jun-tao
JT
Yang
Jian-qiu
JQ
D000138:Acidosis / Q000175:diagnosis; D001034:Apgar Score; D005260:Female; D005312:Fetal Blood / Q000737:chemistry*; D005316:Fetal Distress / Q000097:blood / Q000175:diagnosis*; D005323:Fetal Monitoring / Q000379:methods; D006340:Heart Rate, Fetal; D006801:Humans; D008991:Monitoring, Physiologic; D010092:Oximetry / Q000379:methods; D010100:Oxygen / Q000097:blood*; D010313:Partial Pressure; D011247:Pregnancy; D011296:Prenatal Diagnosis
D010100:Oxygen