[Comparison of Doppler examination and non-stress test in the prediction of intrauterine fetal hypoxia].

OBJECTIVE: To assess the predictive value of intrauterine fetal hypoxia by Doppler examination and non-stress test (NST). METHODS: The normal value of the peak-systolic and diastolic ratio (S/D), pulse index (PI), resistance index (RI), fast volume ratio (FVR) of different gestational age was created according to 4 326 normal pregnancy. S/D, PI, RI, FVR and NST was performed for 2 873 normal pregnancy at the last trimester. Fetal outcomes were recorded within 7 days of birth. RESULTS: (1) S/D, PI, and RI decreased with the gestational age advancing, but FVR didn't. When S/D, PI, RI, FVR or NST appeared abnormal, the ratio of intrauterine fetal hypoxia was 62.0%, 60.7%, 63.3%, 27.0% and 75.7% respectively, as these normal, the ratio of intrauterine fetal hypoxia was 12.8%, 13.9%, 13.0%, 15.7%, 7.5% respectively. There was significant difference (P < 0.01). (2) Logistic regression showed that the predictive value of RI and NST to intrauterine fetal hypoxia was significant (P < 0.05). CONCLUSIONS: The predictive value of NST and RI to intrauterine fetal hypoxia was stronger than other parameters. Multi-parameter may predict more accurately than any single index for intrauterine fetal hypoxia.