Can I drink water before physical examination?

There are many precautions before physical examination, such as not drinking the day before physical examination, fasting before physical examination, wearing loose clothes before physical examination, and stopping using some drugs before physical examination. The main reason for fasting is that eating a lot will affect the results of physical examination, so can I drink water before physical examination?

Can I drink water before physical examination?

Can I drink water before physical examination? Yes, but in moderation, about 200ml.

Generally, people who come to make an appointment for a physical examination will be told that they can't eat after 8 pm on the first day, and they can't drink water after 12 pm. Generally, normal physical examinations are arranged in the morning. Many people have to wait in line when they come to the hospital for physical examination, sometimes 1 1 or even 12. If you don't eat all morning because of physical examination, some people can hold back, but don't drink water all morning. I think many people can't stand it. In fact, it is wrong to think that drinking a glass of water usually affects blood tests. Our human body is running all the time, and it can't run without water. So it is correct to drink some water in moderation. On the morning of the physical examination, you can drink about 200 ml of water (a cup of ordinary water) after getting up, which will not affect the physical examination results.

Some people have a wrong understanding of physical examination and blood test, and think that drinking water before examination will dilute the substances in the blood. For example, drinking water will dilute red blood cells and detect anemia. Is that really the case? Think about it. Under normal circumstances, we have sufficient water supply. If we don't drink water one night and one morning, then our body will be in a state of water shortage. The blood is not diluted, but it will be concentrated, so the test result may be high. Even if all the water we drink enters the blood, the blood of our normal people is about 5L, and with 200ml of water, its dilution effect is very small, not to mention that only a small part of the water we drink remains in the blood. On the morning of the physical examination, you can drink 200ml of water (a glass of water of normal size) after getting up, which will not affect the physical examination results. The water you drink has long been absorbed by participating in human metabolism and will be excreted through urine and sweat. The influence of a glass of water on human body is extremely limited.

However, it is necessary to pay attention. Drinking more water still has an impact, and drinking a glass of water normally is appropriate. It is not advisable to drink sugary and alcoholic beverages, and it is not advisable to drink high-protein and high-fat beverages such as milk. Just drink boiled water. Especially when blood sugar needs to be checked, drinking sugary drinks on an empty stomach will raise blood sugar.

Tips: It is wrong to think that drinking water before examination will dilute the substances in the blood, for example, drinking water will dilute red blood cells and detect anemia. But remember not to eat, drinking water is also drinking boiled water, and the amount should not be too large, preferably within 200ml.

Can I eat before the physical examination?

Can I eat before the physical examination? No, it will affect the physical examination results.

People's blood pressure and laboratory indicators will change with people's activities, diet and other factors within 24 hours a day, especially within 2 hours after meals, blood sugar will increase, gallbladder will contract, and intestinal gas will increase after activities, which will affect the development of pancreas and kidney. These factors will affect the physical examination results, so the physical examination must be carried out in the morning and need an empty stomach.

The doctor told the patient to have a blood test on an empty stomach, not to let the patient be hungry, not to mention the test results after being hungry for more than ten hours. Because if the body is hungry, the number of functional indicators in the body will change, which will lead to the collection of blood samples different from usual. Therefore, even if the results of such tests are "normal", they cannot accurately reflect the real situation of patients.

Hunger has a particularly obvious impact on diabetic patients, because long-term hunger will lead to hypoglycemia shock, cold sweat and even fainting. Finally, it is necessary to inject or take glucose orally to get out of danger. Even if there is no shock, because the fasting time is too long, the blood sugar test result is very low, and it is easy to be mistaken for good blood sugar control, which not only harms oneself, but also misleads doctors. There are also some diabetics who are extremely sensitive to their own blood sugar regulation. When they are hungry for a long time, they will immediately mobilize their glycogen for emergency use. At this time, their blood sugar level is much higher than usual, and this result is incorrect, which will mislead doctors and add trouble to treatment. Therefore, diabetic patients must eat dinner overnight before testing fasting blood sugar.

So, what is an empty stomach? The specific requirements are: the night before blood drawing, patients should maintain their usual living habits and eat normally; Food should be light, don't drink; Don't drink coffee or strong tea after meals; Have a good rest. After getting up the next morning, don't eat breakfast, drink less or no water, don't do morning exercises, and wait calmly for blood collection in the hospital. Such a blood sample is a good sample to reflect the real situation. Some patients' triglycerides are so high that serum affects the accuracy of other blood ester test results like milk. At this time, the doctor will ask them to be vegetarian for a few days, not to eat fat, let the serum clear, and then do blood tests on an empty stomach.

Can I take medicine before physical examination?

Can I take medicine before physical examination? You have to stop using some drugs before the physical examination, otherwise it will affect the physical examination results.

Experts say that there are three situations that need to be stopped:

1. Don't take antibiotics before urine test and blood test.

Because antibiotics may increase the concentration of uric acid in blood, and after taking sulfonamides, urine bile will be turbid, which will affect the judgment of test results. Therefore, if patients have urine tests and blood tests, do not take these drugs 48 hours before seeing a doctor. These drugs will not affect the test results after being diluted in the body for 48 hours.

2. Stop using analgesic and anti-inflammatory drugs 72 hours before physical examination.

This kind of drugs can easily lead to the increase of amylase content in blood and urine, and its effect reaches its peak after 3 ~ 4 hours of administration.

3. Stop using diuretics 24 hours before blood test.

They will reduce the content of potassium ions in blood, leading to changes in blood electrolyte results. However, it should be reminded that even if you want to stop using the above drugs, you must get the doctor's consent. Especially for patients with diabetes and hypertension, drugs for lowering blood sugar and blood pressure should not be stopped casually, otherwise accidents will easily occur, and you must consult in detail before physical examination.

It should be reminded that even if you want to stop using the above drugs, you must get the doctor's consent. Especially for patients with diabetes and hypertension, drugs for lowering blood sugar and blood pressure should not be stopped casually, otherwise accidents will easily occur, and you must consult in detail before physical examination.

Can I smoke before physical examination?

Can I smoke before physical examination? I can't.

Physical examination is to take the initiative to go to a hospital or a special physical examination center to check the whole body when you are healthy. The main purpose is to find out whether there are potential diseases through inspection, so as to take preventive and therapeutic measures in time. Many middle-aged people who think they are healthy are not optimistic. More than 50% middle-aged people suffer from various diseases, such as hyperglycemia, hyperlipidemia, hypercholesterolemia and hypertension.

About the common sense of physical examination, you should know that one week before the physical examination, it is best to quit smoking and drinking, and eat light food instead of spicy food, because these activities will cause the state of blood, cardiovascular and cerebrovascular diseases and their instability, leading to inaccurate physical examination indicators. This is because different cigarettes will release different chemicals when lit, but the main chemicals are tar and carbon monoxide.

Harmful substances produced by cigarette ignition can be roughly divided into six categories:

(1) Aldehydes, nitrides and alkenes can stimulate respiratory tract.

(2) Nicotine can stimulate sympathetic nerve and cause intimal injury.

(3) Amines, cyanide and heavy metals are all toxic substances.

(4) Radioactive substances such as phenylpropyl pyrene, arsenic, cadmium, methylhydrazine and aminophenol. These substances are carcinogenic.

⑤ Phenolic compounds and formaldehyde, etc. It has the effect of accelerating cancer.

(6) Carbon monoxide will reduce the ability of red blood cells to transport oxygen to the whole body.

As can be seen from the above, smoking is not allowed before physical examination, otherwise it will affect the real physical examination results, and smoking is also harmful to the body.