Oxytocin challenge test

The oxytocin challenge test is a trial that uses oxytocin to induce contractions and to observe changes in fetal heart rate and uterine contractions, and then to speculate on placental function. Principle: It is the use of oxytocin to induce contractions, and to observe the relationship between fetal heart rate and uterine contractions, and then speculate on the test of placental function. Indications: Anyone who may have low placental function (such as high-risk pregnancy, IUGR), NST non-responsive type are their indications. Basic Information Specialist classification: maternity check check classification: biochemical examination Applicable gender: whether women are fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: 1. The fetal heart rate baseline variability is normal, or the fetal heart rate is accelerated after fetal movement. 2. By 3 contractions every 10 minutes, lasting ≥ 40, no late deceleration occurred. Positive: 1. Repeated deceleration after repeated contractions, or multiple severe variability deceleration. 2. The baseline variation of fetal heart rate decreases or disappears, or there is no fetal heart rate acceleration after fetal movement. Tips: Twins, uterine mouth loose, early rupture of membrane, previous cesarean section, placenta previa, and placental function height reduction should not be done this check. Normal value 1. The fetal heart rate baseline variability is normal, or the fetal heart rate is accelerated after fetal movement. 2. By 3 contractions every 10 minutes, lasting ≥ 40, no late deceleration occurred. Clinical significance Abnormal results: Positive 1. Repeated deceleration after repeated contractions, or multiple severe variability deceleration. 2. The baseline variation of fetal heart rate decreases or disappears, or there is no fetal heart rate acceleration after fetal movement. Suspicious results: 1. Abnormal fetal heart rate baseline rate, such as bradycardia or tachycardia. 2. Intermittent deceleration occurs at intervals. 3. There is a sporadic variability deceleration, or frequent early deceleration. Excessively strong uterine contractions are too strong, and every 1 minute appears 1 or lasts for ≥90 seconds, and there is a late deceleration. Positive positives suggest a decrease in placental function, and about 50% of the fetuses have a late-stage deceleration or a 5-minute low Apgar score after birth. People who need to be examined: Anyone who may have low placental function (such as high-risk pregnancy, IUGR), pregnant women. Precautions Taboo before inspection: 1. Placenta previa or unexplained prenatal bleeding. 2. Scar uterus. 3. Multiple pregnancy. 4. Too much or too little amniotic fluid. 5. Premature birth and cervical relaxation. 6. Suspected that the fetus has severe intrauterine distress. Requirements for inspection: Check your relaxation and actively cooperate with the inspection. If abnormal uterine contractions or fetal heart abnormalities are found, immediately reduce the number of drops or stop the test. 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 the crowd Inappropriate people: twins, uterine mouth loose, early rupture of membrane, previous cesarean section, placenta previa, and placental function height reduction. Adverse reactions and risks There are no related complications and hazards.