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BELSE Medical: Uncover the 7 little secrets of gynecological B-ultrasound

04-09-2020

Usually there are two types of gynecological B-ultrasound: transabdominal B-ultrasound and vaginal B-ultrasound. Many women are confused about gynecological B-ultrasound such as "What are the advantages and disadvantages of transabdominal B-ultrasound and vaginal B-ultrasound", "Why do you need B-ultrasound to hold your urine"... Below we will answer them one by one.


Confusion 1 What is the difference between transabdominal ultrasound and vaginal ultrasound?


Transabdominal B-ultrasound is troublesome because it needs to hold back the urine, while vaginal B-ultrasound is relatively simple. The instrument used is actually the same as that used by abdominal B-ultrasound. The difference is a unique probe. Put on a layer of film (usually condoms are used), and then insert the probe into the vagina for inspection to explore the pelvic cavity. Although this examination is simple, it is not suitable for everyone. If there is heavy bleeding (menstrual period), vaginal ultrasound is not suitable.


The two inspection methods actually have different "advantages and disadvantages": the transvaginal B ultrasound uses a high-frequency probe, which is close to the uterus and ovaries, and the image is clear and high-resolution, so the inspection results are more accurate. It is especially suitable for examining the endometrium The size of pathological changes and the detection of follicular development; and transabdominal ultrasound is suitable for a larger range. Generally speaking, combining the two will achieve the best diagnostic effect.


Confusion 2 What is the best way to hold back urine?


You need to drink about 6 to 8 cups of water half an hour to 1 hour before the examination. Generally speaking, it is best to hold the urine to the point of urination. This is not like many people "rumors" that it is best to hold it to the limit. Because an over-filled bladder will compress the pelvic organs and cause them to shift and deform, some subtle lesions are often covered up, such as small uterine fibroids and ovarian cysts.


The signs of pregnancy (fetal sac, germ) are also unclear due to compression and flattening. Therefore, holding too much urine is the same as holding too little urine, which will cause diagnostic difficulties and errors.


So how can we calculate the right amount of urine? The sign of good filling is: when the subject is lying supine, the lower abdomen is slightly bulging in a shallow arc, and it can sink under pressure and can be tolerated. If the abdomen bulge is very high, the belly is hard, and the slight pressure is unbearable, it means holding back too much urine and overfilling.


Confusion 3 Why do you want to hold back your urine?


The uterus and ovaries are deep inside the pelvic cavity, and the small intestine often sags into the pelvic cavity. Do abdomen B overtime, the peristalsis of the intestine and its contents will interfere with the image of the uterus and ovaries, causing it to be unclear. Therefore, it is necessary to drink a lot of water before the examination to fill the bladder and push the bowel upward.


If the bladder is not full, ultrasound examination will cause the gas in the bladder to overlap with the gas in the uterus, causing misdiagnosis and missed diagnosis. However, not all gynecological transabdominal B-ultrasound needs to hold urine. It is not necessary at all in the following cases: after 8 weeks of pregnancy, the uterus grows and rises into the abdominal cavity, and the intestinal tube is naturally pushed upwards, and there is amniotic fluid in the uterine cavity. At this time, observing the fetus no longer needs to hold back urine.


Confusion 4 What do you drink will speed up holding back urine?


Want to fill the bladder faster, drinking white water is too slow. And if you switch to coffee and tea and other beverages containing caffeine, it will be quicker, because it has a diuretic effect on the body and makes the body water more likely to lose.


Therefore, if you want to speed up the process of holding back urine, you need not only drink white water, but also drink more coffee and tea. And after the B-ultrasound examination, some white water should be added, because the diuretic effect of strong tea, coffee, etc., will affect the body's water balance and cause cell dehydration.


In addition to beverages containing caffeine, you can also choose some fruit juices, which also have a certain diuretic effect, such as strawberry juice, watermelon juice, and apple juice. In addition, if you stand up and move more while drinking water, or take a walk, it is more conducive to faster urine production.


Confusion 5 color Doppler ultrasound VS black and white B ultrasound


Ordinary B-ultrasound is black and white, is color ultrasound a color? In fact, color Doppler ultrasound is not color, it is only based on black and white B ultrasound, plus color Doppler blood flow imaging, that is, red and blue can be displayed at the same time as B ultrasound, to show the difference Direction and velocity of blood flow. Generally, the blood flow away from the probe is displayed in blue, and the blood flow toward the probe is displayed in red.


Compared with a single black-and-white B-ultrasound, the color B-ultrasound has more functions, more ways to diagnose diseases, and a clearer diagnosis of diseases. Its image resolution is also better than ordinary black-and-white B-ultrasound, especially for the diagnosis of some malignant tumors. In gynecological examinations, doctors will recommend the use of color ultrasound for ectopic pregnancy, but for general gynecological examinations, uterine fibroids or B-ultrasound screening before artificial abortion, ordinary B-ultrasound is sufficient.


Confusion 6 Is B-mode ultrasound safe?


Fundamentally speaking, the reaction of B-ultrasound to the human body is a physical effect. When ultrasonic waves propagate in the human body, it will have an effect on biological tissues. Part of its energy will be converted into heat energy, which will increase the temperature of the human body; At the same time, the mechanical effect produced by the large-scale ultrasonic wave may cause the fracture and crushing of the tissue. Therefore, in this sense, ultrasound is not absolutely safe for biological tissues.


The key to whether B-ultrasound is safe for the human body is the ultrasound dose, which is the product of the ultrasound intensity and the irradiation time. High-intensity and long-term ultrasound can cause damage to the human body or fetus. Generally speaking, regular B-ultrasound equipment has strict control over the output power of ultrasound, and doctors always control the ultrasound dose. Under such conditions, B-ultrasound is safe for gynecological examinations.


So far, normal B-ultrasound has not produced any obvious adverse reactions, and there have been no reports of fetal malformations caused by ultrasound examination. But this does not mean that the B-ultrasound can be done at will, or it does not matter how long or how many times it is done.


Confusion 7 Why are the B-ultrasound results different?


Many people have this experience. Why is the position of the uterus different in the two B-ultrasound examinations, the front position for a while, and the back position for a while. Is this B-ultrasound inaccurate or is the uterus really moving?


In fact, the position of the uterus is divided into anterior, middle and posterior positions, which are all normal. Generally speaking, the anterior uterus has more chances of conception, but the posterior uterus has less chance of conception. If there is no infection or adhesion of the tissue around the uterus, the position of the uterus will move. 

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