Why do you want to have an empty stomach?

summary

Physical examination is a major event related to one's own body. It can detect the hidden diseases in the body in advance, and carry out an early prevention and treatment. For physical examination, most people should have experienced it. Generally, when we go for physical examination, the doctor will tell us in advance that we should have it on an empty stomach. In view of this restriction, some people may have some doubts about it. Why should we have it on an empty stomach?

Why do you want to have an empty stomach?

Physical examination is required to be printed on an empty stomach. If you eat, different ingredients in the food will affect all parts of the body, thus affecting the best examination results. For example, in the blood collection, food decomposition will enter the blood, resulting in fluctuations in the results of various indicators in the blood. Therefore, generally in the physical examination, it requires fasting, which can ensure the scientific and correct test data.

Fasting refers to 12 to 14 hours without eating, generally if the next morning to physical examination, fasting the night before. And fasting physical examination is not simply do not eat it, in the physical examination before 3 days to pay attention to diet, ensure diet light. Some people think that fasting means that you can't eat or drink water. In fact, it's not entirely right. You can't eat during fasting, but it's OK to take a small amount of water. However, it's important to note that you should not drink drinks or tea products, and it should not exceed 200ml.

All test items in the laboratory will have a reference range, and to judge whether the result is abnormal or not is to compare the personal result with the reference range. If it is beyond the reference range, it will be considered as abnormal. The establishment of reference range is mostly based on the test results of fasting blood drawn from healthy people, which is calculated through scientific statistical analysis.

matters needing attention

In the case of emotional excitement, people will secrete some substances, leading to changes in blood pressure, lactose and other contents in the body, which will affect the final test results. Menstruation will affect the blood test results, so it is best not to have physical examination during menstruation. High calorie and high fat diet, will make the body's blood lipid, blood sugar content increased, so generally in the first three days of physical examination to avoid high calorie and high fat food intake, had better not drink.