2, you also need to do color Doppler ultrasound of liver, gallbladder and spleen; There are also tests of blood sugar, blood lipids and blood ions. These tests need to go to the hospital for blood test on an empty stomach, so drinking water before the test may dilute the blood and affect the test effect.
3. In addition, people usually don't eat after dinner, and they will be on an empty stomach for 8~ 10 hours the next morning. If you drink water and food accumulates in your stomach, there will be more gas in your abdominal cavity, which will affect the inspection effect.