The role of fetal heart monitoring
Fetal heart rate monitoring The fetal heart rate is regulated by sympathetic nerves and parasympathetic nerves. The curve of the monitoring graph formed by the signal trace of the momentary fetal heart rate changes can be used to understand the response of the fetal heart during fetal movement and uterine contractions, so as to predict whether the fetus is defective oxygen.
1. Normal fetal heart rate
There are mainly two lines in fetal heart rate monitoring. The upper one is fetal heart rate, which fluctuates between 110 and 160 under normal conditions. Generally, the basal heart rate line appears as a straight wave. When fetal movement occurs, the heart rate will rise and one upward will appear. The protruding curve will slowly decrease after the fetal movement is over, the rhythm is neat, the strength is moderate, just like the "ticking" sound of a clock. The fetal heart rate can be accelerated by 10-20 beats/min during fetal exercise. The bottom line indicates the intrauterine pressure, as long as it increases during uterine contraction, it will then remain around 20mmHg. In normal pregnancy, fetal heart rate monitoring will be performed once a week from the 34th week of pregnancy. If there are complications or complications, it can be performed from the 28th to 30th week of pregnancy. It should be noted whether the rhythm of fetal heart sounds is sudden or slow. Normal fetal heart sounds are 110～160 beats/min. If the fetal heart sounds are more than 160 beats/min or continuous 100 beats/min, it means that the fetus is hypoxic in the uterus. Treat in time.
2. Abnormal fetal heart rate
If the fetal heart rate continues for more than 10 minutes or >160 beats/min, it indicates that the fetal heart rate is abnormal. During fetal heart care, it is found that there is an abnormality in the fetal heart pattern, which is often used to indicate an abnormal fetal heart rate. In most cases, abnormal fetal heart rate means that the fetus has hypoxia in the uterus. The more severe the fetal heart rate is, the more severe the fetal heart rate is. However, not all abnormal fetal heart rates are caused by hypoxia.
If within 20 minutes of fetal heart rate monitoring, your baby's fetal heart rate has a relatively stable baseline, 110 to 160 beats per minute, and your baby has at least two increased fetal heart rate during activity, which is higher than that at rest. If the fetal heart rate is at least 15 beats per minute and lasts at least 15 seconds each time, then the result of fetal heart rate monitoring is normal, or it is called "fetal heart rate monitoring response type". A normal result means that your baby is currently in good condition. Before the baby is born, the doctor may ask you to do fetal heart rate monitoring once a week. If the fetal heart rate does not increase when the baby is active, or does not move even once within 40 minutes, then the result is "non-responsive". The non-responsive type of fetal heart rate monitoring does not mean that the situation must be abnormal. It only means that the monitoring did not provide enough information. You may need to do it again after 1 hour or do other tests, such as fetal biophysical assessment or uterine examination. Shrink stress test. However, the non-responsive type of fetal heart rate monitoring may also indicate that the fetus is hypoxic in the uterus or that there is a problem with the placenta.
If you are interested in this product, please feel free to contact us.
