How to have an ultrasound with urine quickly? To have a urinary ultrasound, you need to hold your urine to make your bladder fully filled before you can perform a urinary ultrasound. But sometimes there is no urine in the bladder and you need to have urine quickly, you can use the following methods: 1. you can drink a lot of mineral water. 2. if there are conditions, you can eat some diuretic fruits, such as watermelon, sugar cane, etc., which can produce urine in a short time. 3. if you are in the hospital, you can ask the doctor to prescribe a tachypnea, after the tachypnea injection, it can produce a lot of urine in a short time. urine.