Do you need to hold your urine for a B-scan?

In clinical B-ultrasound examination of urinary system, patients are often required to hold urine. The purpose of holding urine is to fill the bladder, so that the shape and structure of the bladder can be better displayed under B-ultrasound, and the pathological changes of the bladder can be more easily found. In addition, the determination of residual urine in the bladder before and after urination is also of great significance for the diagnosis of obstructive diseases of the lower urinary tract. Therefore, patients are often required to hold urine during B-ultrasound examination of urinary system. B-ultrasound is widely used in urology, B-ultrasound is safe, no trauma, no radiation, and can be used as the preferred screening method for many diseases. For example, B-ultrasound can detect renal space-occupying lesions, such as renal cysts, kidney stones, etc. It is also of great significance for the diagnosis of ureter, bladder and other diseases.