Can I drink Water before an Abdominal Ultrasound? If you are having an abdominal scan, you are allowed to have clear fluids such as water and black coffee. You Might Also Like Can liver disease be detected on an abdominal ultrasound? 25/01/2022 What does red mean on an abdominal ultrasound? 25/01/2022 What can an abdominal ultrasound Detect? 25/01/2022