Does gallbladder sludge show up on ultrasound? Yes it does. Gallbladder sludge shows clearly on an abdominal ultrasound scan. You Might Also Like What can an abdominal ultrasound Detect? 25/01/2022 Can I have coffee before an abdominal ultrasound? 25/01/2022 Can you see gastritis on an ultrasound? 25/01/2022