B-type ultrasound, commonly known as "B ultrasound", is a medical examination program that patients often come into contact with when they visit the doctor.
In clinical practice, it is widely used in the diagnosis of cardiology, gastroenterology, urology, and obstetrics and gynecology. As a doctor in the auxiliary department, I found that patients have a lot of unclear places on the ultrasound, now I will talk to you about the abdominal "ultrasound" examination of the small knowledge.
CT, nuclear magnetic **** vibration must be better than ultrasound? The answer is no. As an important part of the diagnostic imaging technology, ultrasound has many features that are superior to CT and MRI.
First of all, it is not only able to find the abdominal organs of the lesions, and can be coherent, dynamic observation of the movement and function of the organs; can track the lesions, show three-dimensional changes, and is not subject to the limitations of its imaging stratification. For example, ultrasonography is now recognized as the examination method of choice for diseases of the biliary system.
Second, ultrasound can also monitor blood flow and direction in combination with Doppler technology for organs other than the substantial organs (liver, pancreas, spleen, kidneys, etc.) to identify the nature and extent of damage to the organs. For example, doctors can visualize the various structures within the heart and whether there are any abnormalities through cardiac ultrasound.
Third, ultrasound equipment is easy to move, non-traumatic, for patients with limited mobility can be diagnosed at the bedside. Fourth, it is inexpensive.
The cost of ultrasound examination is generally 35-150 yuan / times, is 1/10 of the CT examination, nuclear magnetic **** vibration of 1/30. This is for most working-class people, is more affordable.
"Ultrasound" is therefore often used for health checks. But all this does not mean that "ultrasound" is better than CT, MRI **** vibration in all aspects? Not really.
For example, B ultrasound in the clarity, resolution, etc., significantly weaker than the latter, and the cavity organ lesions easy to miss, the results of the examination is also susceptible to the influence of the physician's clinical skills. The first thing you need to do is to get your hands on some of the best products and services in the world, and then you'll be able to get your hands on them. The first step is to make sure that you have a good understanding of what you are doing.
The day before the examination of the dinner, should be light and less residue food, food fasting overnight. On the morning of the examination, breakfast and water should be prohibited to ensure that the morning examination in the case of fasting.
This is mainly to reduce the interference of gastrointestinal contents and gas on the ultrasound beam, and to ensure that the gallbladder and bile ducts are sufficiently filled with bile. In some patients, even after dietary abstinence, there is still a large amount of gas in the gastrointestinal tract.
This part of the patient should be 1-2 days before the examination oral flatulence tablets (dimethyl bisiloxane tablets), the elimination of intestinal gas has a certain effect. 2, two days before the "ultrasound", should be avoided gastrointestinal barium meal imaging and cholangiography.
For patients with digestive disorders, sometimes the doctor will prescribe barium meal fluoroscopy and ultrasound at the same time, and it is better for the patient to have an ultrasound examination first, and then a barium meal imaging. Because if there is barium in the gastrointestinal tract, it not only affects the ultrasound image of the gallbladder and pancreas, but is also prone to misdiagnosis.
3, the urinary system ultrasound, especially the ureter and bladder dirty ultrasound, should be 1-2 hours before the examination, drink warm water 400-600 ml, to be full of bladder before the examination. If the patient has to receive a digestive, urinary examination, it is best to check the day of the morning urine, so do not have to drink water to achieve the purpose of bladder filling.
Is color ultrasound better than black-and-white ultrasound? Color ultrasound refers to "color Doppler diagnosis". It uses modern technology to convert Doppler signals into color signals and superimpose them on a two-dimensional black-and-white acoustic image to achieve color blood flow imaging, which makes it possible to observe and evaluate the intravascular space and blood flow status in vitro.
Visible color ultrasound is mainly used for heart disease examination and blood flow detection of the main blood vessels inside and outside the human organs. For example, in the diagnosis of digestive and urological diseases, the blood flow information of portal vein, hepatic artery and renal artery is obtained by color ultrasound.
If the lesions have not yet reached the above blood vessels, but only for the biliary system, pancreatic diseases, it is not necessary to do ultrasound, so as not to increase the economic burden. Can ultrasound examine the gastrointestinal tract? Because the air content in the gastrointestinal tract is more, it is easy to interfere with the ultrasound beam, so that the structure of the display is not clear, and the use of ultrasound to do gastrointestinal examination of the preparatory work is complicated, coupled with barium meal, gastrointestinal diagnostic accuracy of gastric and intestinal diseases and higher than the ultrasound, so the general ultrasound is not as a diagnosis of gastrointestinal diseases of choice method.
2. Principle of ultrasound
B ultrasound B ultrasound is a new discipline, in recent years, the development of rapid, it has become an indispensable diagnostic method in modern clinical medicine.
Diagnostic ultrasound originated in the 40's. In the early 50's, A-type ultrasound diagnostic method was applied to the clinic, and soon B-type, M-type and D-type ultrasound were introduced, in the 70's, B-type rapid imaging technology emerged, and in the early 80's, pulsed and color D-type ultrasound was successfully developed.
And now the success of color imaging, so that the heart, arteries and veins, lymphatic vessels, bile ducts and other sonograms more realistic, at a glance. In recent years, interventional ultrasound is gradually popularized, the application of body cavity probes and intraoperative probes, expanding the scope of diagnosis, but also improve the level of diagnosis and treatment.
For example, esophageal probes, gastric and duodenal probes, abdominal probes, *** probes, uterine probes, as well as rectal and urethral probes and so on. Ultrasound is painless, non-invasive, non-radioactive, and reusable, making it popular with doctors and patients.
In terms of clinical application, B ultrasound can clearly show the organs and surrounding organs of various cross-sectional image, because the image is rich in solid sense, close to the real structure of the anatomy, so the application of ultrasound can be early and clear diagnosis. For example: ophthalmology diagnosis of non-metallic foreign body, in the case of vitreous clouding, can show the retina and behind the ball lesions.
The non-immersion detection of congenital heart disease, rheumatic heart disease, and mucous disease of the heart has specificity and can replace most of the cardiac catheterization. It can also be used for the determination of the passage of small blood vessels, the direction of blood flow, speed can be widely used.
Early detection of hepatic space-occupying lesions has reached the 1-cm level. It can also clearly show the common bile duct of the gallbladder, the hepatic duct, the extrahepatic bile duct, the pancreas, the adrenal glands, the prostate gland, and so on.
Ultrasound can detect the presence or absence of space-occupying lesions, and is particularly accurate in the physical characterization of fluid and cysts, as well as their number and volume. The detection rate of various intracanalicular stones is higher than that of traditional methods.
For obstetrics, it solves many difficult problems that were difficult to detect in the past. For example, it can locate the placenta, measure amniotic fluid, and make early diagnosis of single and multiple fetuses, fetal development, and whether there are malformations and hyperemesis gravidarum, etc.
These are the most common problems in obstetrics.
However, ultrasound also has its current limitations that are difficult to overcome. First of all, its penetrating power is weak, it is difficult to reach the bones, air and other deep, so it is difficult to detect the air-containing organs, such as lungs, stomach and intestines, etc., and the diagnosis of the adult cranium and brain is inferior to X-ray and CT.
The current instrumentation, it is not easy to detect tumor tissues around 1 cm, so ultrasound is negative; it does not exclude the existence of tumor foci around 1 cm. Secondly, due to the occurrence of multiple repeated reflections in the reflection method as well as the pseudo-reflection phenomenon of side discrimination interference, it is sometimes easy to cause misdiagnosis.
Preparation and precautions for ultrasound Ultrasound is painless, non-invasive and non-radioactive for the examinee, so there is no need to worry. 1, when checking the heart, you should take off your shoes and lie down on the examination bed after a few moments of rest, unbutton your shirt, expose your chest, and let the doctor check it; 2, when detecting deep organs that are susceptible to interference by digestive gases, you need to fasting examination or make strict intestinal preparation.
Such as the abdominal cavity of the liver, gallbladder, pancreas, the detection of the best 3 days before the ban on milk, soy products, sugar and other easy to ferment gas-producing foods, 1 day before the examination of the night to eat a light diet, the day of the need to fasting fasting, no food, no water; 3, the patient, such as at the same time to be made of the gastrointestinal, biliary X-ray imaging, ultrasound should be carried out in the X-ray imaging before, or in the above imaging 3 days later; 4, such as the inspection of the pelvic cavity of the uterus and its attachments, bladder, prostate and other organs, bladder urine needs to be retained before the examination, you can drink about 1000 ml of boiled water 2 hours before the examination, and do not urinate 2-4 hours before the examination. .
3. How much does color ultrasound cost
Hello Color ultrasound has more functions, more ways to diagnose diseases, and a clearer diagnosis of diseases.
It usually has five diagnostic ultrasound methods, including B ultrasound, M-mode, pulsed Doppler, continuous Doppler, and color Doppler flow imaging. As a result, its image resolution is also superior to ordinary black and white ultrasound.
Some superficial tissues and organs, such as the thyroid, breast, parotid gland, testicles, etc., need to do color ultrasound, especially for some mass malignant diagnosis is extremely valuable; in addition, some abdominal examination, such as tumors, obstructive jaundice, cirrhosis of the liver, ectopic pregnancy, vascular lesions, etc., the doctor will recommend the use of color ultrasound. The price of color ultrasound is at least several times that of black-and-white ultrasound.
A black-and-white ultrasound machine costs only a few tens of thousands of dollars, while a color ultrasound machine costs hundreds of thousands or even millions of dollars; the charge for doing a color ultrasound is usually about 120 yuan, and a black-and-white ultrasound usually costs about 30 yuan. The first thing you need to do is to choose a color ultrasound or a black-and-white ultrasound, or to choose a color ultrasound based on the needs of your condition. Some conditions don't require precise diagnosis, and a black-and-white ultrasound will suffice, for example, the review of general gallstones, bladder stones, kidney stones, prostatitis, liver cysts, and uterine fibroids can be done with a black-and-white ultrasound.
There are also patients with early pregnancies and those who want to abort their children, who can use only black and white ultrasound. Therefore, as long as there is no need for precise diagnosis, regular hospitals usually do black and white ultrasound first, if still can not be clearly diagnosed, and then according to the need to do color ultrasound, the cost of making up the difference between the two can be.
The "color" of ultrasound is mainly because it can show the distribution of blood flow in the tissue. And not on the image.
4. What to remember about the first pregnancy test
Down's syndrome screening Down's syndrome is a chromosomal abnormality, in order to reduce the chance of giving birth to a child with Down's syndrome, the doctor will be after the 16th week of pregnancy for the pregnant woman to amniocentesis, the extraction of amniotic fluid and separation of fetal cells, in order to check the fetus for chromosomal abnormalities.
This is especially important for pregnant women over the age of 30. The medications you used to take in the early stages of pregnancy may have an effect on the development of the fetus, in order to avoid unnecessary worries.
So before your first pregnancy test, you should inform your doctor that you may be pregnant. Of course, take a pregnancy test if you've had sex and haven't had a menstrual cycle for more than a month, just in case.
This makes it easier to take a pregnancy test. If you have not had a menstrual cycle for more than a week, you can take a home pregnancy test.
Because pregnancy tests are not very accurate, it's best to wait until the second month's cycle is over before you can be sure you're pregnant. And the first pregnancy test is also at the beginning of the fourth week of pregnancy Oh.
When asked by the physician, the mother-to-be should take the initiative to inform the physician of these elements, such as her pre-pregnancy circumference, height and weight; her or her family's history of giving birth to babies with Down's syndrome, malformed fetuses, stillbirths, and diabetes, etc. The mother-to-be should also tell the physician that she is pregnant. Or the way you or your family want to give birth, so that your doctor can conduct the appropriate tests necessary for your specific situation.
Before the first pregnancy test, if pregnant mothers know these tips in advance, it will be very helpful to your pregnancy test. This is a good way to prepare for the pre-pregnancy test, which is very favorable to the pregnant mother.
5. Need to understand the choice of black and white portable ultrasound basic knowledge, is not the higher the price of the ultrasound is better,
Ultrasound, refers to the "color Doppler diagnosis".
It is the use of modern technology to transform the Doppler signal into a color signal, and superimposed on the two-dimensional black-and-white acoustic image, to achieve color flow imaging, making it possible to observe and evaluate the intravascular space in vitro and the state of blood flow. Color ultrasound is mainly used for heart disease examination and blood flow detection of major blood vessels inside and outside of various organs of the human body.
General: the choice of color ultrasound is to see your needs. What place to use.
Color ultrasound is available from low-end to high-end. There is also a difference between high and low prices.
Myriad ultrasound dc-n2s is considered one of the more colorful Myriad ultrasound. The price has the advantage of preferred Belden.
Private clinics, chain clinics, nursing homes, rehabilitation hospitals, psychiatric hospitals, procurement of most of the last buy procurement of the dc-n2s.
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