Do I need to hold my urine when doing color ultrasound? Preparations for color Doppler ultrasound

Many color ultrasounds require holding urine. The most familiar example is that women need to hold urine when doing color ultrasounds after pregnancy. Many gynecological examinations also require holding urine. However, general color ultrasounds for men do not require holding urine, except for prostatitis examinations.

1. In fact, not all color ultrasound examinations require holding urine. For example, in male color ultrasound, men only need to hold urine when undergoing prostatitis examination. As for gynecology, there are more color ultrasound items that require holding urine, mainly gynecological examinations.

2. The uterus and ovaries are located deep inside the pelvic cavity, and the small intestine often hangs down into the pelvic cavity. When performing an abdominal B-ultrasound, the peristalsis of the intestines and their contents will interfere with the image of the uterus and ovaries, causing them to appear unclear. Therefore, you need to drink plenty of water before the examination to fill your bladder and push your intestines upward. If an ultrasound examination is performed when the bladder is not full, the gas in the bladder and the gas in the uterus will overlap, causing misdiagnosis or missed diagnosis. However, not all gynecological transabdominal B-ultrasounds require holding urine. It is not necessary in the following situations: After 8 weeks of pregnancy, the uterus grows and rises into the abdominal cavity, pushing the intestines naturally upwards. There is amniotic fluid in the uterine cavity, so there is no need to hold urine to observe the fetus.

3. When asked about holding urine during color ultrasound , many people always ask "how long is the best to hold it?" Generally speaking, you need to drink about 6 to 8 cups of water half an hour to an hour before the examination. It is best to hold your urine until you feel the urge to urinate. This is not like what many people "rumor" say, that you need to hold your urine to the limit, because an overfull bladder will compress the pelvic organs, causing them to shift and deform, and some subtle lesions are often covered up, such as small uterine fibroids, ovarian cysts, etc., which will not be shown. The signs of pregnancy (gestational sac, embryo) are also not clear due to being flattened by pressure. Therefore, holding urine for too long, just like holding urine for too little, can cause diagnostic difficulties and errors.

The sign of good filling is that when the subject lies flat, the lower abdomen is slightly raised in a shallow arc shape, which sinks when pressure is applied and is tolerable. If the abdomen is bulging very high, the belly is very hard, and a little pressure is unbearable, it is because you have held your urine too much and are overfilled.