Is fasting required for a liver and gallbladder ultrasound?

Abdominal ultrasound examinations of the liver and gallbladder usually require fasting, as eating beforehand may affect the accuracy of the results.

Liver and gallbladder ultrasounds are primarily used to detect diseases affecting these organs. The assessment is based on a comprehensive evaluation of ultrasound boundaries, echoes, and the background appearance of the liver to determine whether lesions are benign or malignant. Since the liver and gallbladder are part of the digestive system, eating before the examination may stimulate gallbladder contraction and increase hepatocyte activity, which could interfere with the observation of abnormal areas. Therefore, patients are advised to undergo the examination on an empty stomach.

Liver and gallbladder diseases can be either benign—such as hemangiomas and inflammatory pseudotumors—or malignant, such as liver cancer. It is recommended that patients, after completing a liver ultrasound and confirming their diagnosis, receive targeted treatment according to the specific condition.