How to see the system B-ultrasound
Systematic B-ultrasound (systematic ultrasound examination) is one of the important prenatal examination methods during pregnancy. It is mainly used to evaluate fetal growth and development, structural abnormalities, placenta, amniotic fluid, etc. Many expectant mothers have questions about the examination process and indicator interpretation of the system B-ultrasound. This article will combine recent hot topics and structured data to provide you with a detailed analysis of the inspection points of system B-ultrasound.
1. System B-ultrasound examination time and purpose
Systematic B-ultrasound is usually performed between 20 and 24 weeks of pregnancy, when the fetal organs are well developed and it is easy to observe structural abnormalities. The following are the main inspection purposes of system B-ultrasound:
| Check items | Specific content |
|---|---|
| fetal growth assessment | Measure head circumference, abdominal circumference, femur length, etc. |
| Organ structure screening | Examine the brain, heart, spine, limbs, and more |
| Placenta and amniotic fluid | Assess placental position, maturity and amniotic fluid volume |
2. Interpretation of key indicators of system B-ultrasound report
The system B-ultrasound report contains a number of professional data. The following are common indicators and their normal ranges:
| Indicator name | normal range | Exception prompt |
|---|---|---|
| Biparietal diameter (BPD) | Approximately 4.7cm at 20 weeks of pregnancy and 6.0cm at 24 weeks of pregnancy | Too big or too small may indicate developmental abnormalities |
| Amniotic Fluid Index (AFI) | 8-18cm | If it is less than 5cm, it is oligohydramnios, if it is more than 24cm, it is too much amniotic fluid. |
| placental maturity | The second trimester should be level 0 | Premature maturation may affect fetal nutritional supply |
3. Summary of recent popular issues
According to the search data of the entire Internet in the past 10 days, the following discussions about system B-ultrasound are the most frequent:
| Popular questions | Expert answers |
|---|---|
| Can system B-ultrasound rule out malformations 100%? | The detection rate is about 70%-80%, and minor abnormalities may be missed. |
| What should I do if the fetus does not cooperate during the examination? | You can recheck after eating or doing activities, and if necessary, check again every other day. |
| Is 3D/4D B-ultrasound better than system B-ultrasound? | System B-ultrasound is the basis, and three-dimensional/four-dimensional imaging only supplements surface imaging. |
4. Inspection precautions
1.Make a reservation in advance:B-ultrasound in the tertiary hospital system requires an appointment 1-2 months in advance.
2.Dress loosely:It is recommended to wear separate clothing to expose the abdomen.
3.No need to fast:Before the examination, you can eat normally and take appropriate activities to stimulate fetal movement.
4.Mental preparation:If abnormalities are found, further non-invasive DNA or amniocentesis is required.
5. Summary
Systematic B-ultrasound is an important checkpoint to protect the health of the fetus. Expectant mothers should pay attention to the examination results but not be overly anxious. Based on recent hot discussions, it is recommended to fully communicate with doctors about the clinical significance of abnormal indicators and avoid blind comparison of online cases. Regular prenatal check-ups and scientific interpretation of reports are the key.
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