To what extent does B-ultrasound hold urine

Do double kidney, ureter, bladder B ultrasound examination, or female uterine accessories B ultrasound examination, need to hold urine, the more adequate urine hold, the more accurate the examination results. The degree of holding urine is in urgent urine, but when pressing the abdomen does not show urinary incontinence, to this extent you can go to the B ultrasound room to do B ultrasound examination. In order to achieve the urine volume required for inspection as soon as possible, it is necessary to pay attention to drinking more water in advance of B. In the short term, a large amount of drinking water can promote the increase of urine volume, or the method of oral diuretic is used to promote the urine volume required for inspection.