At 33 weeks pregnant, is there a slight decrease in middle cerebral artery impedance?

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Hello doctor,
I am 33 weeks pregnant. I did a Doppler ultrasound, the doctor concluded that there was a slight decrease in the impedance of the middle cerebral artery. The doctor asked me if I have a slight decrease in middle cerebral artery impedance at 33 weeks pregnant? What is the cause and how to fix it? Please advise, thank you doctor.
Nguyen Phuong Linh (1984)
Answer
Answered by Master, Doctor Le Nhat Nguyen - Department of Obstetrics and Gynecology, Vinmec Da Nang International General Hospital.
Hello,
With the question “33 weeks pregnant, is there a slight decrease in middle cerebral artery impedance? ", the doctor would like to answer as follows:
Doppler middle cerebral artery is considered an indicator of fetal hypoxia. It is associated with poor pregnancy outcomes and the infant's mental development after birth manifesting at 2 years of age. Valuable to reflect fetal health status.
However, measuring impedance of the middle cerebral artery has good specificity but not high sensitivity.
Causes of hypoxia of pregnancy:
Birth defects. Infection, viral infection, toxicosis, multiple pregnancy, especially twin-twin transfusion syndrome. Abnormalities in the uterus, the mother has diseases that cause chronic hypoxia, the mother has high blood pressure, diabetes, etc. The mother uses and is exposed to toxic substances such as smoking, alcohol abuse, using heroin use,... Placenta, umbilical cord, abnormal amniotic fluid. However, a middle cerebral artery impedance index is not enough to diagnose hypoxic pregnancy, you need to be examined under the guidance of a doctor.
During this time, you must have a rest regime, limit heavy labor, eat properly during pregnancy and have regular antenatal checkups.
If you still have questions about mitigating middle cerebral artery impedance, you can go to a hospital of Vinmec Health System for further examination and advice. Thank you for trusting and sending questions to Vinmec. Wishing you lots of health.
Best regards!