Expectant mother during pregnancy allows you to understand ultrasound

Release date: 2014-08-20

Ms. Wu was pregnant for 12 weeks. The doctor opened an ultrasound checklist and asked her to have an ultrasound examination. She took the ultrasound into her ultrasound room with a sly mood: the baby in the belly did not Do you know how well it is? Are the limbs sound? Do you know that the fetal position is not correct? BB doesn't know how big it is? Will this ultrasound check hurt me and my baby? Presumably, pregnant mothers who entered the B-ultrasound examination room with a complex mood like Miss Wu are not a minority. Knowing how much ultrasound examination during pregnancy, now let you know more, so that you can do ultrasound examination during pregnancy.

Understanding ultrasound

Ultrasound is a non-invasive imaging technique that uses the principle of ultrasound to image the human body. So what is ultrasound? The highest threshold for sound waves that we humans can hear is 20 kHz, and this ultrasonic wave is the sound that exceeds the higher frequencies that our human ears can hear. It has the same penetrating power as the sound wave of the sound. When it encounters an object, it will produce a reflected wave. The frequency of the echo of different objects is different. So the machine collects these echoes and converts it into corresponding images through the computer and displays them on the screen. It is like a doctor's eye, it can be provided to the doctor's internal structure, which helps doctors make a diagnosis.

Is ultrasound necessary during pregnancy?

I don't know if you belong to one of these two groups of people: some pregnant mothers are very nervous about the development of their babies in the stomach, and they are always worried that there will be such a problem of poor development. When they learn that ultrasound can detect the baby early. When abnormal development, I often go to the hospital to ask the doctor to open an ultrasound checklist. I want to use such a technique to seek psychological affirmation. Some pregnant women think that pregnancy is a natural thing. Previously, the ancestors were I haven't had an ultrasound examination during pregnancy, and I have not given birth to a child. So they refused to do any ultrasound examination during pregnancy.

In fact, these two groups of people are extreme and the practices are not correct. China advocates prenatal and postnatal care, in which ultrasound diagnosis is an important measure to ensure prenatal and postnatal care. Domestic prenatal diagnostic experts suggest that the number of ultrasound examinations during pregnancy should be determined on a case-by-case basis, but there are three key opportunities. The three ultrasound examinations were the first ultrasound examination at 11 to 13+6 weeks of pregnancy, the second time at 22 to 24 weeks of pregnancy, and the third ultrasound examination at 28 to 32 weeks of pregnancy. Every ultrasound examination has its special meaning and purpose: the first examination is mainly to look at the fetus, to see if it has been formed, to determine whether it is single or multiple, to determine whether it is pregnant in the uterus to rule out ectopic pregnancy. Possibly, as well as the measurement of the posterior cervical transparent layer for Down's syndrome screening; the second examination is a very important examination, mainly to screen for fetal fatal malformations: no brain, severe brain swelling, severe openness Spina bifida, severe chest and abdominal wall defects and visceral eversion, single-chamber heart, fatal cartilage dysplasia; the third examination is in the third trimester, this time the main check is to understand the fetal growth and development, determine the fetal position, look at the size of the fetus, understand Placental maturity, look at the condition of the amniotic fluid umbilical cord, conduct a final prenatal evaluation, and prepare for fetal production. However, if pregnant women have diabetes, high blood pressure and other diseases, or have a bad birth history, abnormal fetal development, abnormal vaginal bleeding, etc., you need to increase the number of ultrasound examinations under the guidance of a doctor.

Will ultrasound have an effect on the health of pregnant women and the fetus?

This issue is one of the most frequently asked questions for pregnant women and their families. It is also a problem that everyone is most concerned about. To answer this question, we must first return to the essence of the ultrasound examination mentioned above. Sound waves are basically harmless to the human body. This is a fact that everyone knows, then what about ultrasound? If the ultrasound is continuously irradiated to the same site for a long time, it may have a thermal effect, which may have a puffing effect on the cells, but the ultrasonic waves we use during the examination are very low doses, and The exposure time in one part will not be very long. So far, many experts all over the world have done research on the safety of ultrasound, but there is no affirmative conclusion that this ultrasound is harmful to the human body. There have been reports of embryonic death or fetal malformation due to ultrasound examination, and China has adopted a more rigorous attitude toward ultrasound examination. As long as ultrasound examination is allowed within the allowable range, it will not cause any harm to pregnant women and fetuses. There are more and more reports on various fetal malformations and dysplasia by means of ultrasound diagnosis. Therefore, at present, ultrasound is a non-invasive technique that is widely accepted by the public.

Ultrasonic examination through the vaginal cavity is terrible, will it cause miscarriage?

Some pregnant women in the early pregnancy, through the vaginal ultrasonography, that is, through the vagina in the body for ultrasound examination, this sounds creepy, do this ultrasound examination, will it cause miscarriage? In fact, vaginal ultrasonography is not as terrible as imagined. In the early pregnancy, because the uterus has not increased, too much can not be seen through the abdomen, and vaginal ultrasound is by gently inserting the probe of the size of the fingernail. In the vagina, before insertion, the doctor will apply a film to the detector and apply a lubricant. Compared with abdominal ultrasound examination, vaginal ultrasonography can detect fetal sac earlier, early detection of ectopic pregnancy, diagnosis and treatment can be done in the case of ectopic pregnancy, reducing the risk of internal bleeding, and vaginal ultrasound Checking for a short diagnosis time will not increase the risk of miscarriage, so don't worry too much.

Ordinary B-ultrasound and color ultrasound, which one is more suitable for pregnant women to do?

Many pregnant women have been exposed to the terms of black and white B-ultrasound and color ultrasound when they are doing the check-up. Sometimes doctors will open black and white B-ultrasound, and sometimes open color ultrasound. Then, ordinary B-ultrasound and color ultrasound, pregnant women choose which is more suitable. What? In general, you should choose color ultrasound, because color ultrasound has higher resolution than black and white B-ultrasound, it can help doctors to see the whole blood supply of the fetus, clearly understand the blood supply of the placenta and umbilical cord, and more advanced For example, three-dimensional and four-dimensional color ultrasound can show the structure of the fetus more clearly. The three-dimensional and four-dimensional color ultrasound are observed by ordinary color ultrasound, and then the observed planar image is converted into three-dimensional and four-dimensional stereoscopic images through the conversion software in the instrument. The resolution is higher than that of a general color Doppler ultrasound system, and thus is widely used for prenatal fetal malformation screening.

Is color ultrasound a color ultrasound?

Some pregnant women or their families may ask this question: Is the doctor, color ultrasound a color ultrasound? This is not the case. The full name of color Doppler ultrasound is color Doppler ultrasound, also known as D-mode ultrasound. It is an ultrasonic diagnostic method for detecting blood flow and organ activity. By quantitatively measuring the flow of blood in the lumen, it is determined whether the blood vessel is unobstructed or not. Whether it is stenosis, occlusion, and lesions. Compared with ordinary B-mode ultrasound, the resolution of color-adjusted instruments is higher, so it can better improve the diagnosis rate of diseases. For example, in prenatal ultrasound examination, when a U-shaped or W-shaped impression is found behind the fetal neck, if color Doppler ultrasound is applied, it is possible to determine whether there is an umbilical cord around the neck and the umbilical cord around the neck for several weeks. Diagnosis.

When do you need an ultrasound to check your urine? When do you need to urinate?

Some people need ultrasound examination after urinating. Many pregnant women come in without urinating. Sometimes, doctors say that this ultrasound examination does not require urinating, and many pregnant women are confused. I don’t know when to lick. Urine, when do not need to hold urine. In general, ultrasound examination before the three months of pregnancy (ie 12 weeks), because the uterus has not increased, still in the pelvic cavity, then this time we need to urinate, through the bladder after the urine, the bladder Better to see the uterus; after 12 weeks of gestation, generally this is no longer necessary to check urine, but if the doctor suspects that she has a placenta previa, pregnant women still need to look at the position of the placenta by urinating at this time. In addition to this situation, under normal circumstances, ultrasound examination after 12 weeks of pregnancy does not require urine.

What should I do if the ultrasound finds an abnormality?

If you are diagnosed with a fatal malformation by ultrasound, doctors generally recommend that pregnant women induce labor; there are some deformities, such as congenital heart disease, but after the fetus can be corrected by surgery, the doctor will generally give the situation to pregnant women. And the family said clearly, as for the stay, the choice is still handed over to pregnant women and their families; there are some minor abnormalities, and these abnormalities can slowly return to normal within the pregnancy, such as patent foramen ovale, etc. Then, the doctor will advise the pregnant woman to come back for a period of time to see how it changes, whether it is a good side, or a worse aspect, and then decide what to do next.

Is ultrasound able to detect all the symptoms? Is there a condition that cannot be detected by ultrasonography?

Regrettably: the answer is --- ultrasound examination can not find the symptoms. Severe malformations are often easily detected, but some conditions may be overlooked or may not be visible during ultrasound examinations. Studies have shown common severe morphological and structural abnormalities such as spina bifida, limb insufficiency, and severe abdominal problems. The discovery rate is 90%, the rate of heart disease discovery is about 25%, and functional lesions are not found by ultrasonography.

Source: Family doctor online

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