uterine stress test

The contraction stress test (CST) is one of the commonly used monitoring methods at birth. It can be used to understand the function of the placenta and the tolerance of the fetus to transient hypoxia during contractions by changing the fetal heart rate during contractions. The safety of the fetus. If there are more than 3 consecutive decelerations in 10 minutes, the baseline rate of fetal heart rate is reduced, and the fetal heart rate after fetal movement is not accelerated to OCT positive, suggesting that the placental function is reduced; if the fetal heart rate has no late deceleration, the fetal heart rate is accelerated after fetal movement. Negative for OCT, suggesting that the placenta function is good and the fetus is not at risk of death within a week. Basic Information Specialist classification: maternity check check classification: ultrasound Applicable gender: whether women are fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: If the fetal heart rate baseline is mutated or the FHR is accelerated after fetal movement, there is no late deceleration, which is negative for OCT. Positive: If repeated deceleration occurs repeatedly after multiple contractions, the baseline variation of fetal heart rate is reduced, and there is no FHR increase after fetal movement, which is positive for OCT. Tips: Check your relaxation, check may cause physical and psychological burdens, you should face it positively, and actively cooperate with the inspection. Normal value If the fetal heart rate baseline is mutated or the FHR is accelerated after fetal movement, there is no late deceleration, which is negative for OCT. Clinical significance Abnormal result If repeated deceleration occurs repeatedly after multiple contractions, the baseline variation of fetal heart rate is reduced, and there is no FHR increase after fetal movement, which is positive for OCT. If it is positive, it suggests that the placental function is reduced. Because of the false positives, the significance is not as large as negative. You can add urine E3 value or other tests to further understand the placental function. Pregnant women in the crowd who need to be examined. Positive results may be diseases: abnormal productivity, dystocia, fetal distress Inappropriate people: pregnant women near the birth. Pre-inspection contraindications: The internal monitoring method can avoid interference, the pattern is clear, but there is the possibility of causing intrauterine infection, so strict aseptic operation is required, and antibiotics should be applied after the test. The pressure tube avoids touching the placenta. Requirements for inspection: Checking for relaxation, checking may cause physical and psychological burdens, should be actively faced, and actively cooperate with the inspection. Inspection process It is to use oxytocin for pregnant women, induce contractions, and observe changes in fetal heart rate in the case of contractions. It takes 20 minutes to record. Not suitable for pregnant women near the delivery period. Adverse reactions and risks Generally no complications occur.