Why do we need oxygen during fetal heart monitoring? What should we do if the fetal heart monitoring is abnormal?

Pregnant mothers who have done fetal heart monitoring know that they need to breathe oxygen when doing fetal heart monitoring. So, why do you need to breathe oxygen when doing fetal heart monitoring? What should I do if the fetal heart monitoring value is abnormal? Let's learn about it together~

Why is oxygen needed for fetal heart monitoring?

Generally, when the fetal movement is obvious or decreases or increases, it is a case of fetal hypoxia, and oxygen therapy should be performed. The results of fetal heart monitoring are more accurate. Fetal heart monitoring uses the principle of ultrasound to monitor the condition of the fetus in the uterus, and is the main means of correctly evaluating the condition of the fetus in the uterus. You can understand the reaction of the fetal heart during fetal movement and uterine contraction to infer whether the fetus in the uterus is hypoxic. The normal fetal heart rate is 120 to 160 beats/minute. If the fetal heart rate is above 160 beats/minute or continues at 100 beats/minute, it indicates fetal intrauterine hypoxia and should be treated in time, that is, pregnant women need oxygen to improve fetal intrauterine hypoxia.

If the fetal heart rate does not increase when the baby moves, or if it does not move once in 40 minutes, the result is "non-responsive." An unresponsive fetal heart rate monitoring does not mean that the situation is definitely abnormal, it just means that the monitoring did not provide enough information, and you may need to do another test in 1 hour or do another test, such as a fetal biophysical assessment or a uterine stress test.

However, an unresponsive fetal heart rate monitor may indicate intrauterine hypoxia or placental problems. If the doctor thinks your baby is not doing well in the uterus, you may be advised to have an induced labor or a cesarean section. If the fetal heart rate monitor slows down, you can consider oxygen inhalation twice a day, combined with B-ultrasound examination. If the placenta and amniotic fluid are normal, you can recheck the fetal monitor after 3-7 days.

Normal values ​​of fetal heart rate monitoring

There are two lines on the fetal heart rate monitoring chart. The upper one is the basic fetal heart rate line, which is generally a wavy straight line. When fetal movement occurs, the heart rate will rise, showing an upward protruding curve, and will slowly decrease after the fetal movement ends. The lower line represents the intrauterine pressure, which will only increase during uterine contractions and then remain at around 2.66kPa (20mmHg).