How to do 4D color Doppler ultrasound

Does ultrasound have any impact on the fetus? B-ultrasound is a four-dimensional color ultrasound examination device that can obtain a three-dimensional image of the fetus in real time and is an excellent examination method. The four-dimensional color ultrasound scanner has an excellent ergonomic design. It is an instrument made using the principle of ultrasound. It does not emit radiation sources such as radiation, microwaves, and radio waves, and has no effect on human health.

Because four-dimensional color ultrasound diagnosis causes little damage to the human body, can be checked repeatedly, and the diagnosis is fast and accurate, it has become the preferred imaging diagnosis method in obstetrics and gynecology, providing a more reliable basis for diagnosis and research, and has become an indispensable auxiliary diagnosis tool. B-ultrasound is a type of ultrasound that has no radiation source and only scans the body for a short period of time, so it has no adverse effects on pregnant women and fetuses.

How much does a four-dimensional color ultrasound cost? The charging standards for four-dimensional color ultrasound are different in each region, and the price ranges from 300 to 500 yuan. In addition, the prices of four-dimensional color Doppler ultrasound equipment vary greatly depending on the device. It is recommended to do a self-diagnosis B-ultrasound examination in a reliable specialist clinic. The price of four-dimensional color ultrasound is strictly in accordance with the charging standards of the local health department.

Four-dimensional ultrasound examination can be performed at any stage of pregnancy, but the best time is 20-26 weeks of pregnancy. At this time, the main internal organs of the fetus have grown and developed, the amniotic fluid flow is appropriate, and the fetus has entered the abdomen, which is conducive to the screening of fetal malformations. Moreover, because the four-dimensional color ultrasound displays information in three dimensions, it can capture the growth and development of the fetus's internal organs and even observe the fetus's condition in the pregnant mother. It can make an early diagnosis of fetal malformations (such as cleft lip, cleft palate, bone growth abnormalities, cardiovascular malformations, etc.), which is very different from previous B-ultrasound equipment.

1. Fetal system screening

Placenta grading: Thickening is divided into 3 grades on the examination report. Grade 1 is the early stage of placental maturation, with uniform echoes, and this change can be seen at 30-32 weeks of pregnancy; Grade 2 indicates that the embryo is close to maturity; Grade 3 indicates that the embryo is already mature. The closer to full term, the more perfect the embryo is, which means the more perfect the fetus's lungs are. Only when the lungs are perfect can the fetus survive after birth.

2. Fetal growth and development index values

Amniotic fluid depth: 3-7cm is normal. More than 7cm indicates excessive amniotic fluid, and less than 3cm indicates insufficient amniotic fluid. Too much or too little amniotic fluid is abnormal.

Amniotic fluid index: Taking the pregnant woman's navel as the center, it is divided into 4 areas: upper, lower, left and right. The amniotic fluid depths in the 4 areas are summed to get the amniotic fluid index. The standard value of the amniotic fluid index in late pregnancy is 8-18 (24) cm.

Biparietal diameter (BPD): The length of the longest point in the middle of the upper and lower sides of the head, also known as the "greater transverse diameter of the head". When the delivery date cannot be determined based on the brachiocephalic diameter in the early stage, the biparietal diameter is usually used for prediction; in the middle and late stages, when determining the baby's weight, it is usually necessary to accurately measure this data.

After the fifth month of pregnancy, the biparietal diameter is basically consistent with the month of pregnancy. In other words, the biparietal diameter is about 7.0cm at 28 weeks of pregnancy (July); and about 8.0cm at 32 weeks of pregnancy (August). By analogy, after 8 months of pregnancy, the average...