1, avoid excessive fasting. In order to ensure the accuracy of blood test results, many blood tests require patients to have an empty stomach. However, excessive fasting will also affect the test results. If the fasting time is more than 18 hours, some tests will have abnormal results, such as serum bilirubin may increase due to the increase of fasting time, and blood sugar may decrease to hypoglycemia due to the long fasting time.
The fasting standard is: the night before blood drawing, try to maintain the usual living habits and eat normally; Food should be light, don't drink; Don't drink coffee or strong tea after meals. After getting up the next morning, don't eat breakfast, drink less or no water, don't do morning exercises, and calmly go to the hospital to wait for blood collection.
2. Avoid drawing blood too late. During the day, people's metabolism always fluctuates, and the metabolic rate is not at the same level. Therefore, the physical examination requires blood to be drawn on an empty stomach at 7: 30 ~ 8: 30 in the morning, and it cannot exceed 12: 00 at the latest. It's too late, because of the influence of physiological endocrine hormones in the body, the test value will be distorted.
3. Avoid mood swings. Stress and emotional excitement can affect neuroendocrine function, leading to the increase of serum non-esterified fatty acids, lactic acid and blood sugar. Therefore, before the physical examination, you should control your emotions, keep your emotions stable before the exam, don't walk around, don't eat cold drinks, and don't smoke.
4. Avoid strenuous exercise. Exercise will cause changes in blood and body fluid components, even a slight activity will lead to an increase in physiological blood sugar and changes in endocrine hormone levels, thus affecting performance. So don't do strenuous exercise two days before physical examination, and don't do light activities such as walking before 1 hour.
5, avoid greasy diet. Diet is the most important factor affecting blood lipids. Blood lipids should be checked after fasting 12 hours. Generally, after dinner, don't eat other food except water. In addition, in order to ensure the objective and accurate results of the physical examination, the subjects must eat less or not eat high-fat food and drink alcohol within 3 days before the physical examination.
6. Avoid the physiological period. Women's menstrual period, pregnancy and other physiological conditions will affect the blood test results, so women should not do gynecological examination, blood routine examination and liver function examination before and after menstruation. Breast infrared examination is also best chosen one week after menstruation is clean.
7. Don't stop taking drugs blindly. Blood collection should be on an empty stomach, but patients with chronic diseases should be treated differently. For example, some patients with hypertension have to take antihypertensive drugs every morning. Stopping drugs or delaying taking drugs rashly will lead to a sharp rise in blood pressure, which is dangerous. Therefore, patients with hypertension should take antihypertensive drugs as usual before receiving physical examination. If you are taking antibiotics, vitamin C and diet pills, you should wait for 3 days after stopping taking them.
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/mcq . people . com . cn/m/CQ/news . cqr 300？ Num = 7657911"target =" _ blank "title =" People's Daily Online-Nine Precautions before Physical Examination "> People's Daily Online-Nine Precautions before Physical Examination.