In recent years, due to the advancement of science and technology, it has been used in B-ultrasound (obstetric ultrasound) and developed into 3D and even 4D forms. However, the \”incomplete prenatal examination\” in the news reports has made many pregnant women feel panic, thinking that with such advanced technology, why did they not know that the baby was defective until after giving birth? What information can pregnant mothers get after having a B-ultrasound? What are the conditions of babies that B-ultrasound (prenatal ultrasound) cannot take care of? Let me tell you~
B-ultrasound is not a panacea
From the moment she finds out she is pregnant, a pregnant mother\’s biggest wish is for her baby to be healthy. Therefore, every time she checks, she has to ask the doctor whether the baby\’s limbs are healthy? Or do you have congenital heart disease? etc. Dean Sun Sanyuan said that as doctors, we all understand mothers’ concerns, but ultrasound is indeed not a panacea. For a professional OB/GYN, I really don\’t know where to start with answering a question like this. It\’s hard to say. It will be considered by pregnant women as shirking responsibility; the answer is absolutely no problem! How can we ensure that the baby is fine until the moment he is born? Dean Sun Sanyuan regretfully said that in the era before ultrasound, doctors did not have such big worries!
The development of ultrasound
The development of ultrasonic technology began during World War I, when the British Navy used ultrasonic waves to measure the depth of the seabed and detect German submarines that threatened Britain in active waters. After World War II, some people believed that the fetus was in amniotic fluid. Like a submarine in the ocean, the idea came up to apply ultrasound to fetal scanning. The earliest medical literature was published in 1958 by a British doctor.
Ultrasound is an early detection of treatable fetal anomalies
The pictures displayed by the two-dimensional B-ultrasound must be professionally trained medical staff to see clearly what is going on, which also aroused my mother\’s doubts. Dean Sun Sanyuan said that when pregnant women undergo prenatal ultrasound examinations, the doctor will explain while taking pictures, so that the pregnant women can feel involved and feel more at ease. Often, however, pregnant women can only be told that these are hands and feet. Or maybe it’s my brother’s little ball. But I can\’t tell pregnant women for sure that the fingers are all 5 fingers and not connected together. President Sun Sanyuan pointed out that ultrasound examination can help doctors understand the condition of the fetus in the womb, but it cannot know whether the fetus\’s intelligence, vision or hearing and other physiological functions are normal. In addition, there is no way of knowing if the disease is caused by genetic and chromosomal abnormalities. The purpose of prenatal ultrasound is to detect treatable fetal abnormalities as early as possible and to provide appropriate prenatal counseling.
What problems can B-ultrasound check for the fetus?
Dean Sun Sanyuan pointed out that in 2003, the United States formulated guidelines for the use of obstetric ultrasound, which are divided into four categories, which are briefly described as follows:
[Ultrasound examination in the first week after delivery (before 12 weeks)] includes ruling out ectopic pregnancy, confirming fetal heart rate, estimating the number of weeks of pregnancy, assessing whether there are uterine or ovarian tumors, and determining whether there are multiple pregnancies.
[The second time (12-24 weeks) or the third timeThree perinatal ultrasounds (after 24 weeks) continue the first week of fetal growth assessment, amniotic fluid measurement, placental position and fetal position confirmation, and fetal anatomy examination. Details of the fetal anatomy examination include:
1. Neck: Ventricles, choroid plexus, septum pellucidum.
2.Thorax: Four-chamber heart diagram.
3. Abdomen: The junction of the stomach, kidneys, bladder, umbilical cord and abdominal wall.
4. Spine.
5. Limbs: Whether there are arms and legs.
6. Gender: No need to check.
[Examination with limited role] In the emergency department, if a pregnant woman has vaginal bleeding, the obstetrician-gynecologist can use ultrasound to determine whether it is a miscarriage or other reasons; or if fetal position is suspected, use B-ultrasound to determine the fetal presentation site, such as: breech position is Butt comes out first.
[Special inspection (expert inspection)] A special scan performed when there are questions about the basic inspection. For example: heart scan, advanced scan, Doppler blood flow test, etc.