Pregnancy and Birth: How to Correctly Interpret General Obstetric Ultrasound Reports

As indicated in the title, this is the interpretation of the general obstetric ultrasound report, which does not include [large malformation screening]. I will specially write popular science articles on three other hot ultrasound topics: [large malformation screening] [umbilical cord around neck] [low placenta], please pay attention.

When visiting the outpatient department, many expectant mothers will have many problems and perplexities after each ultrasound examination: can the baby give birth naturally even if the biparietal diameter is relatively large? What about the baby’s short legs? Can placental aging not supplement calcium? ……

In fact, doctors also face a lot of confusion, Ultrasound is the eye of an obstetrician, Now the resolution of ultrasonic machines is getting higher and higher. More information about the fetus can be obtained, Find more small changes that were not seen before, But at the same time, it also brings trouble in interpretation. Don’t write down these small changes, My heart is not steadfast. Write it down. Obstetricians do not know how to explain it to expectant mothers, because the clinical significance of many small changes is not very clear. Therefore, everyone sighs that if they know too much, they will not become doctors. If they did not know so many details before, they will not be as painful as they are now.

Everyone has considered too much. In fact, it is not so complicated or so serious. Please listen to me.

How many ultrasound times do you need during pregnancy?

Under normal conditions, 5 ultrasound examinations are required.

(1) Ultrasound dating for 6-7 weeks: mainly confirms the gestational age to see whether it is intrauterine pregnancy or ectopic pregnancy, single or twin (chorionic) or multiple, and whether the embryo is dead or alive.

(2) NT scan at 11-14 weeks: mainly to check NT and draw blood for Down’s screening in early pregnancy.

(3) Systematic ultrasound scan at 20-24 weeks: mainly screening for fetal malformation (detailed in another article).

(4) About 32 weeks of growth scan: mainly monitoring the growth and development of the fetus

(5) Examination for about 37 weeks: mainly to estimate the fetal weight and confirm the delivery mode (not all hospitals do this).

Do you want to do three-dimensional color ultrasound and four-dimensional color ultrasound?

Under normal circumstances, three-dimensional ultrasound and four-dimensional ultrasound are not required, In the hands of experienced ultrasound doctors, Two-dimensional ultrasound is sufficient for screening large malformations. Only in some special cases, For example, three-dimensional ultrasound examination is only needed when more intuitive examination of fetal facial abnormalities is needed. Four-dimensional ultrasound is even more gimmicky. It is only a time axis added to the three-dimensional imaging, and dynamic three-dimensional imaging can be seen in real time. It is only used in a few cases.

Frequently Asked Questions for Obstetric Ultrasound Reports:

(1) Does a large biparietal diameter mean that cesarean section is required instead of vaginal delivery?

You worried God had thought of it for a long time. He arranged that the baby’s cranial suture was not closed, When the birth canal is squeezed, the baby’s cranial suture can overlap (adults can’t), so the biparietal diameter will shrink and it is easy to pass through the birth canal. Therefore, the baby’s biparietal diameter is too large or can be delivered through vagina. During delivery, the baby’s head shape changes from round to long, and after a few days, it will recover from long to round again.

(2) The baby’s legs are short, which is very worrying:

Oriental baby’s legs are short, It is meaningless for ultrasound and obstetricians to casually say that the baby’s legs are somewhat short. If it is really short limbs, The ultrasound doctor had to write it down in black and white, It is to reach the 2.5 th% lower than the standard value. Friends who have seen my real person all know that my legs are not long. Fortunately, B-ultrasound is very rare when my mother is pregnant with me. Otherwise, irresponsible ultrasound doctors and obstetricians will tell my mother that the child’s legs are short and cannot be taken, so abort it. Then there is no Duan Tao to write popular science for you to see.

(3) Can placental aging not supplement calcium?

Placental grading has nothing to do with perinatal prognosis or calcium supplement. In fact, it is not necessary to write it down. Even if the ultrasound doctor writes it down, you don’t need to pay attention to it at all.

(4) Why is it that sometimes the amniotic fluid volume is written on the report and sometimes the amniotic fluid index is written?

The general practice is to write the depth of only one amniotic fluid pool if the amniotic fluid volume is normal. If there is too much or too little amniotic fluid, the amniotic fluid index of the four amniotic fluid pools added up must be written.

Author: Duan Tao

The article was reprinted by Clove Garden authorized by the author, and the original text was published on WeChat Public Number [Dr. Duan Tao].