How to view system B-ultrasound: comprehensive analysis and hot topics
In recent years, systematic B-ultrasound has attracted much attention as an important examination method during pregnancy. This article will combine the hot topics and hot content on the Internet in the past 10 days to provide you with a detailed analysis of the system B-ultrasound examination methods, precautions and related data to help expectant mothers better understand this examination.
1. Basic concepts of system B-ultrasound
System B-ultrasound, also known as fetal system ultrasound examination, is a method of comprehensive examination of the fetus through ultrasound technology. It is mainly used to evaluate the growth and development of the fetus, whether the organ structure is normal, and the status of accessory structures such as the placenta and amniotic fluid.
2. System B-ultrasound inspection time
According to clinical guidelines, the best time for systematic B-ultrasound examination is between 20 and 24 weeks of pregnancy. At this time, the fetal organs have basically developed and formed, and the amount of amniotic fluid is moderate, making it easy to observe.
| Gestational age | Check content |
|---|---|
| 11-13 weeks | NT examination (measurement of nuchal translucency thickness) |
| 20-24 weeks | Systematic B-ultrasound (comprehensive fetal structural screening) |
| 28-32 weeks | Growth ultrasound (to assess fetal growth and development) |
3. System B-ultrasound examination contents
System B-ultrasound mainly checks the following contents:
| Check site | Specific content |
|---|---|
| head | Skull integrity, ventricular structure, cerebellum, etc. |
| face | Lip continuity, eye sockets, etc. |
| spine | Continuity and arrangement |
| chest | Four-chamber section of the heart, connection of great blood vessels, etc. |
| Abdomen | Gastric alveoli, kidneys, bladder, abdominal wall integrity, etc. |
| limbs | Long bone development, hand and foot morphology, etc. |
| appendages | Placenta position, amniotic fluid volume, number of umbilical cord blood vessels, etc. |
4. Recent hot topics
1.Can system B-ultrasound 100% rule out fetal malformations?
A hotly debated topic recently is the accuracy of system B-ultrasound. Experts say that although systematic B-ultrasound can detect most structural abnormalities, about 20-30% of malformations may still be missed due to technical limitations and fetal position and other factors.
2.Is 3D/4D B-ultrasound better than 2D?
Many expectant mothers are concerned about whether they need a three-dimensional or four-dimensional B-ultrasound. In fact, system B-ultrasound is based on two-dimensional ultrasound, and three-dimensional/four-dimensional ultrasound is mainly used for auxiliary diagnosis and image retention, and is not required for examination.
3.Will the long system B-ultrasound examination time have any impact on the fetus?
In response to this concern, experts pointed out that the ultrasonic energy used by B-ultrasound is very low and the examination will not cause harm to the fetus within a reasonable time. However, it is recommended that a single inspection time be controlled within 30 minutes.
5. Precautions for system B-ultrasound inspection
| Things to note | Description |
|---|---|
| Preparation before inspection | No need to fast, you can eat appropriately; it is recommended to wear loose clothing |
| Check timing | Choose a time period when the fetus is more active to facilitate observation |
| Mental preparation | Keep a calm mind, the test results need to be interpreted by a professional doctor |
| Check fit | Change body positions according to doctor's instructions, which may require multiple examinations |
6. How to interpret the system B-ultrasound report
1.Normal report interpretation
Normal reports usually describe "no obvious abnormalities" in each part and give measurements of fetal size, fetal heart rate, amniotic fluid and other indicators.
2.Exception report handling
If the report indicates abnormalities, do not be overly alarmed and should consult a professional doctor. Further examination or consultation may be required.
3.Explanation of common terms
| Terminology | meaning |
|---|---|
| BPD | Biparietal diameter reflects the size of the fetal head |
| HC | Head circumference |
| AC | Abdominal circumference |
| FL | femur length |
| AFI | amniotic fluid index |
7. The difference between system B-ultrasound and other examinations
| Check type | main purpose | best time |
|---|---|---|
| NT check | Early screening for risk of chromosomal abnormalities | 11-13 weeks |
| System B-ultrasound | Fetal structural malformation screening | 20-24 weeks |
| sugar sieve | Gestational diabetes screening | 24-28 weeks |
8. Summary
Systematic B-ultrasound is an important abnormality examination during pregnancy. Expectant mothers should conduct examinations on time and correctly understand the examination results. Recent hot spots show that the public's attention to the safety, accuracy and application of new technologies continues to increase. It is recommended to plan a reasonable prenatal check-up plan under the guidance of a professional doctor to ensure the health of mother and baby.
Finally, we remind you that the development of each fetus is different, and the examination results should be combined with a comprehensive clinical assessment to avoid over-interpretation of a single indicator. Maintaining a good attitude and regular prenatal check-ups are the keys to ensuring health during pregnancy.
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