Liver ultrasonography is generally harmless. The most important thing is to have a good understanding of the patient’s needs. However, some patients may be allergic to the contrast agent, such as localized fever and some erythema or itching of the skin, and other minor allergic symptoms. The clinical probability of allergy to contrast media is generally very low, about 1 in 1,000. The most important thing to remember is that the patient’s health and medical history will determine whether or not to have a liver ultrasound, so the patient must be truthful about his or her previous medical history or family history.
Patients who need liver imaging need to fast for 8-10 hours before having liver imaging, and their diet needs to be as light as possible before the test to avoid spicy and irritating foods and to ensure adequate rest. The liver is a very important part of the body.