Can you eat before having a B-ultrasound?
Jun 25, 2024
Source: Cainiu Health
Dr. Zhao Xiaodong
Introduction
A "B-ultrasound" refers to a B-mode ultrasound examination. If the ultrasound is performed on areas other than the abdomen, eating is generally allowed; however, for abdominal ultrasounds, fasting is required. To avoid affecting the examination results, it is recommended to consult the hospital or doctor in detail about specific dietary requirements when scheduling the ultrasound appointment. If there are special circumstances, such as hypoglycemia requiring regular meals, inform the doctor in advance.
B-ultrasound refers to a B-mode ultrasound examination. If the ultrasound is performed on areas other than the abdomen, eating is generally allowed; however, if it is an abdominal ultrasound, fasting is required. If abnormalities are detected, timely treatment is recommended. The details are as follows:
1. Eating is allowed
If the ultrasound examination is performed on areas outside the abdomen—such as the breasts, thyroid, or blood vessels of the limbs—eating normally before the exam is usually permitted, as food intake has minimal impact on the results.
2. Eating is not allowed
For abdominal ultrasounds, such as those examining the liver, gallbladder, pancreas, spleen, or pelvic organs in gynecology, fasting is typically required. After eating, increased gas and food residue in the gastrointestinal tract can interfere with the penetration of ultrasound waves, obscuring the organs being examined and reducing diagnostic accuracy. In such cases, fasting for 6–8 hours prior to the exam is generally recommended to ensure optimal imaging quality.
If there are special circumstances, such as hypoglycemia or other medical conditions requiring regular meals, patients should inform their doctor in advance. Additionally, staying calm and avoiding excessive anxiety during the waiting period can help achieve more accurate results.
