[The influence of internal fetal monitoring on pregnancy outcome and survey of uterine contraction].

Pregnancy outcome of 30 primigravida receiving internal fetal monitoring (IFM) was studied with 52 cases without IFM as control. Intrauterine pressure was measured in IFM patients during active phase and second stage of labor. The occurrence of fetal distress, neonatal morbidity and the positive isolation rate of bacteria in amnionic fluid and aspirate from the throat of newborns was 56.7%, 23.3%, 50.0% and 45.5% respectively in the IFM group. The occurrence of fetal distress and neonatal morbidity were significantly higher than those of the control group. The intrauterine pressure, duration, frequency and intensity of uterine contractions during active phase and second stage of labor were observed. The characters of uterine contraction in IFM and external fetal monitoring were different, and a kind of false fetal heart rate deceleration was described in the paper.