Do you want to hold urine when doing hepatobiliary and splenic ultrasound?

If only the color Doppler ultrasound examination of the upper abdomen is done, it is not necessary to hold urine, but it needs to be fasting, because the gallbladder will secrete bile after eating, which will affect the effect of B-ultrasound examination. What needs to hold urine is to check the bladder or pelvis. If there is abnormality in B-ultrasound examination, further CT examination is needed to confirm the diagnosis.