Within two days before the date of the ultrasound, do not consume heavy or bloating products. On the day before the examination, you should take an agent that reduces gas accumulation in the digestive tract, eg Espumisan. The ultrasound should be performed on an empty stomach or not eaten for 6 hours before the examination. It is advisable that the bladder is full during the examination, therefore one liter of still water (4 glasses) should be drunk 1-2 hours before the ultrasound examination.