Another term you might hear for this test result is a categorization of 1, 2, or 3. A non-stress test monitors a fetus without triggering contractions. A contraction stress test, on the other hand, monitors the fetus` response to contractions. During CST, slight contractions are induced by nipple stimulation or medication. If your baby`s heart rate drops during contractions, it could be a sign of problems. Your doctor may suggest other tests. Sometimes early delivery is the best option. Electronic fetal monitoring creates a display on a computer screen or paper graph that records the heart rate and contractions of the fetus. In the image above, you can see the fetal heart rate marked with the blue indicator. The contractions are red. If you smoke, stop for 2 hours before the test.
Smoking can reduce your baby`s activity and heart rate. Some women who have complications during pregnancy need a CST, although the test is much less common than before. Most often, you will receive a non-stress test or biophysical profile. If these results indicate a potential problem, your doctor may suggest CST as follow-up. If the results are negative or inconclusive, your doctor may want to repeat the test weekly or twice a week until birth. You may be asked not to eat or drink for 4 to 8 hours before the test. Empty your bladder before the test. This test may be recommended if a non-stress test or biophysical profile (BPP, an ultrasound performed with a non-stress test) indicates a problem. It can determine if the baby`s heart rate remains stable during contractions. During the test, your doctor will place two straps on your abdomen – one to measure contractions, the other to measure fetal heart tones.
Your doctor will give you pitocin (artificial oxytocin) to trigger contractions. Alternatively, you can stimulate your nipples by rubbing them, which can also lead to contractions. To perform the test, your doctor will induce slight contractions. An external fetal monitor attached to your abdomen during the test tracks the strength of contractions and your baby`s heart rate. CSE results last one week. If your test is negative and your pregnancy goes beyond a week since your previous TSC, your doctor may want to repeat the CST in a few days to a week. Your baby`s heart rate and contractions are recorded for 10 minutes. Your blood pressure and other vital signs are also recorded. Rarely, during a non-stress test, a baby`s heart rate problems are detected that require additional monitoring or treatment. An MBPP is also an NNT with ultrasound. Ultrasound examines only the amount of amniotic fluid present. The MBPP test takes less time than a BPP.
Your doctor may think that the MBPP test is enough to check the baby`s health without doing a full BPP. A fetal monitor is used. You are given oxytocin (pitocin), a hormone that constricts the uterus. The contractions will be like the ones you will have during labor, but softer. If the baby`s heart rate slows down after a contraction instead of accelerating, the baby may have problems during labor. A non-stress test is usually done at your doctor`s office. An abnormal stress-free test or a modified biophysical profile usually needs to be further evaluated by a contraction stress test or a complete biophysical profile. Further treatment should then be based on the results of the contraction stress test or biophysical profile, gestational age, degree of oligohydramnios (if assessed) and maternal condition. During the non-stress test, you lie on a sun lounger. You will have your blood pressure measured at regular intervals during the test.
A contraction stress test can be performed after 34 weeks or later. Ambiguous-hyperstimulating. Fetal heart rate delays that occur in the presence of contractions that are more frequent than every two minutes or last more than 90 seconds. Sometimes it`s easier to read the prints by looking at them from the side. Typically, a stress-free test takes 20 minutes. However, if your baby is inactive or sleeping, you may need to extend the test for another 20 minutes – hoping your baby will become active – to get accurate results. Your doctor may try to stimulate the baby by placing a noise-generating device on your stomach. In some clinics, while the baby is being monitored, you may be advised to perform a slight stimulation of the nipple. This stimulation often causes your body to release small amounts of oxytocin, causing the uterus to contract. The baby`s heart rate is monitored during the resulting contractions. As a general rule, a non-stress test is recommended if the baby is believed to be at increased risk of death.
A non-stress test can be performed after 26 to 28 weeks of pregnancy. Some stress-free test results may indicate that you and your baby need special monitoring, testing, or care. In the absence of obstetric contraindications, delivery of the fetus with an abnormal test result can often be attempted by induction of labor with continuous monitoring of heart rate and fetal contractions. If repeated delays are observed, caesarean delivery is usually indicated. The heart rate of a healthy baby increases from time to time. During the non-stress test (NNT), your provider will monitor whether the baby`s heart rate goes faster at rest or in motion. You will not receive medication for this test. The results of the stress-free tests shall be classified as reactive or non-reactive. Different definitions of responsiveness were used.
Most often, the non-stress test is considered reactive or normal if there are two or more fetal heart rate accelerations in a 20-minute period, with or without fetal movement recognizable by the woman according to ACOG. .