Can I drink water in the morning for a check up? 20. Can I drink water in the morning for physical e

You can't drink water in the morning for physical examination, and drinking water will affect the body's data.

Physical examination is the abbreviation of physical examination, which refers to the physical examination of the examinee through medical means and methods. It is a medical diagnosis and a means of diagnosis for symptoms or diseases and their related factors. The procedure of the health examination is generally to complete blood tests (including blood routine, blood biochemistry, blood immunity, tumor markers, hormones, trace elements, etc.) and abdominal ultrasound examination under the premise of fasting.

There are also clinical examinations such as internal and external, ophthalmology, otolaryngology, stomatology, ** and traditional Chinese medicine that do not require fasting, as well as auxiliary examinations such as electrocardiogram, chest fluoroscopy, bone density, transcranial Doppler, etc., of course, other items can also be selected according to the specific situation.

Many people are often troubled by fasting for 10 hours before the check-up and fasting in the morning.

In fact, it is possible to drink water before the medical examination. Many people are concerned about whether the results of blood and urine tests will be affected during the physical examination. In fact, in the early morning of the physical examination, you can drink 200 ml of boiled water after getting up, which will not affect the results of the physical examination.

The content of human blood accounts for about 7-8% of body weight, so the blood volume of a person weighing about 60 kg is about 4200-4800 ml.

If you drink 200 ml of boiled water on the morning of the physical examination, it will take half an hour to go from home to the hospital and then be collected for blood, and the water you drink has already been absorbed and has penetrated into the tissues to participate in metabolism. During this half hour, 20-40 ml of urine is produced, and some of it is excreted through breathing and sweating. Therefore, the increase in blood volume at that time will not exceed 40 ml, and the proportion will be less than 1%, and this will not have any effect on the blood index.

It's okay to drink a small amount of water.

Not only should you not drink water, but you should also ensure that you have an empty stomach for at least 10 hours before the physical examination.

The fasting physical examination is actually for several special examination items, including blood collection and laboratory tests to check liver function, measurement of blood pressure, blood lipids and blood sugar, as well as abdominal ultrasound examination to deteriorate stomach examination, these items are generally required to stop eating after dinner the day before the physical examination, to ensure that the fasting is 8 hours, so that the examination results are relatively accurate.

Precautions before the physical examination:

Try to eat less greasy things in the first 3 days, don't eat big fish and meat, and then don't lead to alcohol, or take medicine, if you have a cold and other symptoms during the examination, you should notify the department in time not to be hard, because some inconspicuous small problems will also affect the body, and it is necessary to ensure adequate sleep, do not stay up late will affect blood pressure. Please remember to refrain from eating and drinking on the morning of the medical examination. If you have had surgery before, you should bring relevant medical records and relevant information.

Resources. Can I drink water before the medical checkup? 39 Health Net [cited on 2018-4-29].

No. The items that need to be performed on an empty stomach are blood draws and abdominal ultrasounds. The main reason is that after eating, different components of food will have different degrees of influence on the results of the examination, and then interfere with the results of the examination.

For example, when abdominal ultrasonography is done, there is food in the gastrointestinal tract, which will also affect the imaging to a certain extent, making it more difficult to distinguish normal abnormalities.

If blood is collected after eating, the food will be broken down and enter the bloodstream, and the serum concentration of transaminases and triglycerides will increase, which will also affect the test results of various indicators.

If you are really thirsty after getting up in the morning, you can drink a small glass of water (no more than 200ml), which must be pure water or plain water, which has no great impact on the physical examination.

Because if you drink too much water before doing a urine routine examination, it will dilute the urine, and it will have a great impact on the pH value in the urine.

The general physical examination is laboratory blood and urine routine, blood biochemical analysis, and hepatobiliary ultrasound examination, but you cannot drink water and eat breakfast, and you need to have accurate fasting results.

The requirements for the physical examination are fasting, do not eat eight hours before the physical examination, and eat lightly the day before the physical examination. On the morning before the body, due to dry oropharynx, you can drink a small amount of boiled water, purified water, mineral water, etc., and the total amount should not exceed 100 ml.

Because the blood lipid and blood viscosity need to be fasted. Diet has a great impact on blood lipids, and the concentration of triglycerides in the blood will continue to increase within 6 hours of eating fatty foods, and will gradually fall back to a stable state after 6-8 hours. Therefore, a test of lipids requires a 12-14 hour fast.

2-3 days before the blood test blood lipids, you should try to maintain the original eating habits, avoid eating and drinking, and do not drink alcohol.

Because the blood lipid and blood viscosity need to be fasted. Diet has a great impact on blood lipids, and the concentration of triglycerides in the blood will continue to increase within 6 hours of eating fatty foods, and will gradually fall back to a stable state after 6-8 hours. Therefore, a test of lipids requires a 12-14 hour fast.