Do I need to hold my urine when doing 4D color Doppler ultrasound?

There is no need to hold urine when doing four-dimensional color ultrasound. The on-site sampling of four-dimensional color ultrasound is between 24-28 weeks of pregnancy. The four-dimensional color ultrasound examination is also called the major fetal malformation examination. It mainly checks whether the fetus has any deformities. Through the three-dimensional imaging of the fetus in the uterine cavity, the growth and development of the fetus's face and limbs can be observed. It can also determine whether there is anencephaly, spina bifida, abdominal defects, visceral defects, congenital heart disease, cleft lip and palate and other diseases. Any abnormalities can be confirmed through four-dimensional color ultrasound.

Holding urine during gynecological color ultrasound refers to the situation within 9 weeks of pregnancy, during which time you need to hold urine. After 9 weeks, the test tube embryo has already formed, and there is no need to hold urine during color ultrasound. Four-dimensional color ultrasound is a very important examination item during pregnancy, and you need to go to the hospital to make an appointment in advance.

The obstetrics department performs four-dimensional color ultrasound examination, which is usually carried out between 20 and 28 weeks of pregnancy. At this time, there is no need to hold urine for the four-dimensional color ultrasound examination. Four-dimensional color ultrasound examination is more widely used in clinical medicine, which is the fetal malformation examination during pregnancy, usually after 12 weeks of pregnancy. However, doing the four-dimensional color ultrasound examination too early is very likely to cause some subtle growth and development abnormalities that may be misdiagnosed, reducing the accuracy of the examination results. Doing the four-dimensional color ultrasound examination after 20 weeks, because the fetus's system structure has been fully developed, the accuracy of the examination results will be significantly enhanced, and misdiagnosis is generally less likely to occur. In order to improve the accuracy of the four-dimensional color ultrasound examination results, the fetus's full cooperation is required during the four-dimensional color ultrasound examination. If the baby is not active or the posture is not appropriate, the pregnant woman should follow the doctor's advice and take appropriate measures to induce fetal activity.

Whether using two-dimensional color ultrasound or four-dimensional color ultrasound, fasting is only required when examining some abdominal organs, such as the liver, gallbladder, pancreas, common bile duct, etc. Because the food and gas in the stomach after a meal can absorb ultrasound, ultrasound cannot reach the organs behind the stomach. In addition, if the food contains long-chain fatty acids, it will also cause gallbladder contraction and affect the diagnosis of gallbladder disease, so you need to fast before the examination. In addition, when doing urinary system examinations and gynecological examinations, you need to hold your urine to create a sound-transmitting window, so that you can clearly examine the organs of the pelvic urinary system.