Umbilical examination

The umbilical cord is used to check the blood supply of the fetus to see if the pregnant mom has intrauterine hypoxia and other issues. Umbilical examination is performed by Doppler, similar to B-ultrasound. Umbilical blood flow measurement is a non-invasive test to monitor the placental circulation. The abnormal increase in umbilical blood flow resistance is often related to placental function, arteriovenous diameter in the umbilical cord, resistance level, blood flow speed, etc., and it is related to fetal blood oxygen. Supply is closely related. Pregnant women with umbilical cord around the neck in the head position. When the fetal head enters the pelvis before delivery or the fetal head gradually drops during labor, if the umbilical cord around the neck is relatively short, resistance to umbilical blood flow increases, and umbilical blood flow decreases, which can cause acute fetal Ischemia and hypoxia cause fetal distress. Therefore, before delivery, when the umbilical cord blood flow measurement is performed, the fetal head has entered the pelvis, you can directly measure the umbilical cord blood flow around the neck umbilical blood flow value; for those who have not entered the pelvis, the umbilical cord blood should be measured when the fetal head drops after abdominal compression Stream value. Prenatal umbilical blood flow measurement has a prospective role in predicting fetal distress.