NST (nonstress test)

The course of the baby's heart rate and any contractions and movements of the baby's heartbeat for the test to observe this relationship. According to this observation, the fetus normal or distress (distress) that if it tries to figure out. NST is one of the tests for the detection of fetal well-being. The other tests to determine the well-being of the fetus ultrasound, amniotic fluid measurement, Doppler measurements, biophysical profile , OCT , such as tests. This is the most commonly used NST TESTS.

Two ends of the probe are fixed on the so-called pregnant belly. Proplardan contractions of the uterus and the other one detects the baby's heart tones. Convulsions and heart sounds are perceived by the device are transferred on a graph paper. During the test, the mother's left side lying position is required to increase blood flow to the uterus is.

During this process, which lasted about 20 minutes, pregnant women feel the movements of the hands of all the babies will be prompted to press a small button. Thus, the baby's heart rate and reactivity (pulse rate variability), the uterine contractions of the heart contractions and the baby's responses are evaluated by a physician is an indirect information about the health of your baby can be obtained.

36 pregnancies with no risk of application of NST A week after weeks of gestation, 40 After weeks of gestation is recommended to be repeated every 2-3 days. NST full before the process of saturating the mother's belly diet rich in carbohydrates is recommended. NST done because the fetus is 28 weeks in fetuses yet developed enough to give this kind of response. The test may be wrong nagatif the fetus is asleep.


NST or other methods well-being of the fetus should be considered when:
- Less hisedilmesi fetal movements
- Premature rupture of membranes (waters arrive early)
- Amniotic fluid is more or less
- IUGR (gerlişme retardation in the fetus)
- Postterm
- İzoimmnunizasyon (blood incompatibility)
- Fetal anomalies
- Multiple pregnancies
- Abnormal or irregular fetal heart rate
- Hypertension
- Diabetes
- Kidney diseases
- Collagen tissue diseases
- Heart disease
- Thyrotoxicosis (Goitre tests disorder)
- Hemoglobinopathies
- Anemia

As with all tests in the margins of error are NST. Reactive NST (Good Yield) be nonreactive (bad Yield) is a more reliable finding. Given good results, so that the reliability of reactive NST fetus 95'ir% probability of 95% is really good. But that is non-reactive NST poor results when the fetus is really bad (distress, fetal distress) to durumund rate is 40%.

Reactive NST
NST fetal heart rate during 20 minutes and 15 seconds, which lasted for at least 2 times a 15-shot acceleration does so well, this test is considered reactive. 20 minutes, 2 times during the fetal heart rate acceleration in this way shall be extended at least 40 minutes of the test. This is the second in the fetal heart rate every 20 minutes at least 2 times the acceleration test is considered non-reactive so bad. Evaluation of the outcome of the fetus as a reactive NST so good it would be in good condition shows a high probability for a period of 1 week.

Non-reactive NST
Yield as described above, deemed to be non-reactive test result, so bad, so bad for sure the fetus is said to be distressed. Non-reactive NST reliability is low. Therefore, further tests will be evaluated again with the fetus. To do this, contraction stress test (CST, OCT), biophysical profile, Doppler, ultrasound tests are used.

DESELERATİF NST
Detected fetal heart rate decelerations NST timeline. Sıkınrı the fetus (fetal distress) suggests that case. Early decelerations, late decelerations and variable decelerations decelerations, including a 3-course I am. Early decelerations followed NST kontraksiyonlardan (womb contractions) immediately before and decelerations of the fetal head are formed as a result of jam, junk decelerations, the fetus does not mean that if sıkınbtı. Variable decelerations occur independently of the kontraksiyonlardan and so important decelerations are caused by cord compression. Late decelerations occur immediately after kontraksiyonlardan and arise from failure of the placenta, the fetus is in distress (fetal distress) indicates. Decelerations very severe cases may need an emergency caesarean section.

Tachycardia
The heartbeat of the fetus timeline NST 160 / min, remain at above. Mild tachycardia to 160-180, 180-200 between the medium and severe tachycardia greater than 200 is called.
Treatment is planned for cause.
Reasons:
- Feta hypoxia, fetal distress (fetal distress Thumbnail)
- Maternal high fever
- Hyperthyroidism
- Maternal and fetal anemia
- Parasympatholytic effect drugs: eg atropine, hydroxyzine
- The effect of sympathomimetic drugs: ritodrine, terbutaline (These are medications that are given to stop preterm labor.)
- Chorioamnionitis (inflammation of the membranes of pregnancy)
- Fetus heart failure or other cardiac pathology
- Prematurity