How much urine does prostate B ultrasound need to hold back?
How much urine is needed for prostate B-mode ultrasound depends on the capacity of the patient’s bladder. Some people can hold back 100 milliliters of urine, while others need about 300 milliliters, so there is generally no clear value. It’s best to do it when you feel like holding back urine for a while, but not when you urinate immediately.