The SD value is the ratio of the systolic and diastolic blood pressures of the fetal umbilical artery, which is closely related to the blood supply to the fetus. When the SD value is relatively high, you should be vigilant. If it remains high, the fetus may be suffering from hypoxia. We know that hypoxia is an important cause of cerebral palsy, so you should remain vigilant and receive appropriate treatment in time. Pregnant women should pay more attention to nutrition to avoid causing greater harm to the baby. Will the fetus have cerebral palsy if the SD value is high? The SD value will occur at irregular intervals, perhaps when the pregnant woman is close to the due date or when she is still young. No matter when it happens, the pregnant woman must be vigilant and observe the baby's condition at all times. If she feels something is wrong, she should seek medical attention immediately. If the SD value remains high and there is no treatment, it will cause fetal hypoxia, which may cause fetal cerebral palsy. But nothing is certain, the baby may bring us surprises. However, to be on the safe side, pregnant women must go to the hospital for regular examinations in a timely manner if they find themselves feeling unwell, actively cooperate with the doctor, and actively receive treatment. Generally, if the SD value is high, oxygen can be used. In the hospital, they can breathe oxygen on time according to the doctor's instructions and maintain an optimistic and cheerful mood every day. Do not have too much psychological burden during the treatment. The psychological burden will have a great negative impact on us and will affect our treatment results and the development of the baby. What is SD valueS/D refers to the ratio of fetal umbilical artery systolic pressure to diastolic pressure. This ratio is related to fetal blood supply. When the placenta functions poorly or the umbilical cord is abnormal, this ratio will be abnormal. Under normal pregnancy conditions, as the gestational age increases, the fetal needs increase, S decreases, D increases, and the ratio decreases. When the pregnancy is close to full-term, S/D is less than 3. Generally speaking, an S/D value ≥ 3.0 is considered abnormal, indicating that the placental circulatory resistance is high and the placental blood perfusion is decreased, causing the fetus to be in a state of nutritional deficiency and hypoxia. During normal pregnancy, the S/D and RI values of the fetus tend to decrease as the pregnancy progresses. In particular, the change in the S/D value is an important indicator for understanding whether the fetal development is normal. Stage 1: If the S/D and RI values increase between 26 and 28 weeks of pregnancy (S/D should be less than 3 and RI should be less than 0.8 after 28 weeks of pregnancy), the following should be considered: Fetal malformation: Fetal congenital diseases are closely related to umbilical artery resistance and should be further examined by B-ultrasound. Umbilical cord abnormality: When the umbilical cord is entangled, too long or too short, or too thin and affects the placental circulation, the blood flow impedance index will become abnormal. If the S/D value is higher than normal and ultrasound shows abnormal conditions such as the umbilical cord around the neck, the baby should be closely observed according to the stage of pregnancy. Poor placental function: Pathological changes in the placenta can lead to a decrease in placental volume, a decrease in the total cross-sectional area of effective blood vessels, increased blood flow resistance, and a decrease in blood perfusion. Intrauterine growth retardation (IUGR): There are many reasons that cause IUGR in pregnant women. In addition to genetic nutrition, harmful contact, malformation, viruses and other factors, the proportion of IUGR caused by pregnancy appendages such as the placenta is increasing, which is manifested as increased S/D and RI values. |
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