According to the frequency of uterine contraction, the fetal heart monitoring chart can be divided into: normal (observation for at least 30 minutes, average 10 minutes? 5 times), too strong (observation for at least 30 minutes, average 10 minutes >; 5 times). The uterine contraction curve indicates the intrauterine pressure, which will increase during uterine contraction and then remain at around 20mmHg. The observation of uterine contraction curve plays a very important role in judging deceleration (refers to the deceleration of fetal heart rate during uterine contraction). Fetal heart deceleration is divided into multiple times (at least half of contractions decelerate within 20 minutes) and intermittent times (contractions decelerate less than half within 20 minutes). According to the relationship between fetal heart rate and uterine contraction, it can be divided into three categories: early deceleration, variant deceleration and late deceleration.
There are two main lines of fetal heart monitoring. The above is the fetal heart rate, which normally fluctuates between 120- 160. When the fetus is young (less than 20 weeks), the fetal heart rate is relatively fast (it can be 160- 180 beats/min) and relatively slow. The difference between each beat of fetal heart is called short-term variability. The normal variation range is 5-25 times/minute, and the fetal heart fluctuates 3-8 times in one minute, which belongs to normal short-term variability. However, after fetal movement, the fetal heart rate can temporarily increase, which is higher than 160 beats/min, but it immediately returns to normal, which is a sign of good fetal health. If the fetal heart beats more than 160 times per minute, or less than 120 times, or the heartbeat is irregular, fast and slow, jumping and stopping, and there is a gap in the middle, it is abnormal. The next explanation is that the intrauterine pressure will only increase when the uterus contracts, and then it will remain at around 20mmHg.
How to read the fetal heart monitoring chart For the fetal heart monitoring chart, expectant mothers must first understand several basic concepts and the meaning of each concept. The main mastery includes the following aspects:
Within 1 and 20 minutes, the baseline of fetal heart rate is 120 to 160 times, and no fetal movement is the best. If the full score is greater than 160 or less than 120, points will be deducted as appropriate.
2. Amplitude is the fluctuation amplitude of fetal heart baseline when there is no fetal movement. 10 or above is full score, and after 5-9 times, it is 1.
3. The frequency of fetal heart rate rising during fetal movement is more than 15 times, from the starting point to the highest point.
4. The duration of fetal heart rate rising during fetal movement is longer than 15 seconds, from the starting point to the highest point.
5. The number of fetal movements is more than 3 times in 20 minutes.
Full marks indicate that the fetus is in good condition in the uterus within one week, and there is no sign of hypoxia. If it is 8 to 7 points, it means that the fetus is suspected of hypoxia. If it is lower than 7 points, it means that the fetus is hypoxic in the uterus. If you see fetal movement, the fetal heart rate drops significantly. At rest, the fetal heart returned to normal and the suspicious umbilical cord wrapped around the neck. The abscissa represents time and the ordinate represents times. The top line of the atlas represents the trend of fetal heart rate, and the bottom line represents intrauterine pressure. General intrauterine pressure is 20. If the intrauterine pressure exceeds 50 times three times in a row within 10 minute, it means that the pregnant mother is in labor, and those who have not yet reached the expected date of delivery should pay attention to abortion. At the same time, don't do it after 1 1, because hungry pregnant mothers will also affect the results.
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