How long should I fast before physical examination?

Don't eat or drink the day before physical examination, especially after 8 pm, don't drink, strong tea, coffee, and don't eat too sweet, salty or greasy food, otherwise it will affect blood sugar, blood lipid and liver function. Secondly, go to bed early at night to avoid strenuous exercise and emotional excitement, otherwise it will also affect the accuracy of physical examination.

Finally, blood should be collected within the specified time, and it should not exceed 10 am at the latest, otherwise it will be affected by hormones and the blood state will change. In addition, women should avoid menstruation, do not wear makeup, do not wear dresses, pantyhose, necklaces and other accessories. If you have had surgery, you should bring relevant medical records and related materials.

Extended data:

Several items requiring fasting examination:

1, blood lipid: the blood lipid level is closely related to diet, and it is significantly higher after meals than before meals, so fasting blood must be checked.

2. Liver function: Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) reflecting liver metabolism, and total protein (TPO), albumin (ALB) and globulin (GLO) reflecting protein metabolism are greatly influenced by diet, which requires fasting (drinking water and eating after two and a half tests for hepatitis B).

3. Renal function (including uric acid): Urea nitrogen (BUN), creatinine (Cr) and uric acid (UA) are greatly influenced by diet and exercise, so fasting is needed.

4. Blood biochemistry: including potassium (k), sodium (Na), chlorine (C 1), calcium (ca), magnesium (Mg), phosphorus (p), etc. Eating will affect your grades, so it is necessary to have an empty stomach.

People's Network-Does the physical examination need an empty stomach? Remember the precautions before physical examination.

People's Network-Be prepared before the physical examination, and don't let these medical examination misunderstandings let go of the disease.