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Anonymous users2024-02-12Nowadays, B ultrasound is a more commonly used detection method in hospitals, which can detect diseases, and can also be used in ** examinations, to detect whether you are pregnant, and to observe whether the fetus is healthy according to the images and data displayed by B ultrasound during pregnancy tests, etc., when it comes to a certain month, you can also identify the sex of the fetus, so how many weeks of pregnancy do you need to do B ultrasound?
Under normal circumstances, in the first trimester of pregnancy (about 12 weeks of pregnancy), pregnant mothers should have a B-ultrasound examination. Pregnant mothers should avoid doing ultrasound too early, or doing ultrasound multiple times. Doing ultrasound too early may lead to fragile, newly formed embryos, which is not conducive to embryonic development.
In the first trimester of pregnancy, ultrasound is done to determine whether there is pregnancy and the number of days of gestation, to provide a reliable basis for determining the expected date of delivery, and to detect whether the embryo development is abnormal in time.
The second ultrasound examination is generally arranged in the second trimester of pregnancy (about 20 weeks of pregnancy), when the intrauterine amniotic fluid is relatively large, the fetal size is relatively moderate, and there is a large space for movement in the uterus. More obvious malformations, such as congenital heart disease, anencephaly, hydrocephalus, spina bifida, abdominal wall defects, short limbs, polycystic kidneys, gastrointestinal atresia, etc., are easy to find. If necessary, the pregnancy can be carried out in a timely manner** or terminated.
The third ultrasound examination should be scheduled in the third trimester of pregnancy (about 28 weeks of pregnancy) to understand the development of the fetus in utero and to recheck the fetus for malformations. Because there are some diseases in the second trimester, ultrasound may not be detected in time.
If the pregnant mother has not delivered two weeks after the due date, the doctor may recommend another ultrasound to understand the placenta, amniotic fluid, fetal position, etc., and help the doctor decide which delivery method is safe.
If the pregnant mother suffers from certain diseases, ultrasound examination is more important. The number and time of ultrasound examinations during pregnancy should be arranged by the doctor according to the pregnancy situation.
For pregnant mothers, ultrasound can detect the status of fetal development, so for ordinary people, what can ultrasound detect? Let's find out!
1. B ultrasound can check the size, position and shape of the uterus and ovaries, whether there is abnormal development, whether there is a tumor, and the relationship between the tumor and the uterus and ovaries; may detect abnormal fluid accumulation in the pelvis; The presence or absence of a foreign body in the uterine cavity.
For obesity, abdominal wall tension, especially unmarried women or infants and young children, when the pelvic condition cannot be identified, B-ultrasound can be used for examination.
2. B ultrasound can quickly detect changes in the size and shape of liver, gallbladder, bile duct, spleen, pancreas, kidney, adrenal gland, bladder, prostate and other organs; whether it is in a normal position; Whether it has been compressed by surrounding tumors or organs.
At the same time, the location of the abdominal mass and the relationship with the surrounding organs can be accurately determined; Able to accurately distinguish whether the mass is solid or combined with a fluid cyst, hematoma and abscess; It can also distinguish whether the tumor is benign or malignant.
3. B ultrasound can accurately determine whether there is ascites in the abdominal cavity, even if a small amount of ascites can be detected with B ultrasound; Enlarged lymph nodes of more than 1 cm in the abdomen and pelvis can be detected; The contraction of the gallbladder can be observed and the function of the gallbladder can be determined.
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