What effect does drinking water have on physical examination

There will be a routine physical examination before joining the company, and in formal units, there will be a physical examination plan every year. Everyone is required not to drink water or eat on the day before the physical examination, otherwise it will affect the examination results. Many people don’t know what effects drinking water will have. Drinking water will mainly affect blood routine and liver function, otherwise it will be inaccurate. This article introduces the specific reasons. If you want to know more, please take a look.

1. Can I drink water before the physical examination?

1. Do not drink too much water the night before the physical examination, otherwise you will have to go to the toilet frequently at night, which will affect your sleep quality and cause your body to become swollen to a certain extent.

2. On the morning of the physical examination, you can drink some water to ensure the body's necessary water intake, but remember that you can only drink about 200 ml of water, which is the size of a regular cup. .Because the functional activities and metabolism are slow at night. Generally, physical examinations are conducted in the morning. If you drink a lot of water in the morning, your metabolism will be accelerated, which will affect the accuracy of the physical examination results.

3. In fact, you can drink water after completing certain specific examinations, such as blood drawing, stomach examination, etc. In addition, there are some items that require appropriate amount of water. For example, when women are doing B-ultrasound, if the bladder is not full, the images of the uterus and ovaries cannot be seen clearly.

2. Does drinking water during a physical examination affect liver function?

It will have an impact, because drinking water will increase blood volume and cause blood pressure to rise. This reduces the proportion of tangible substances in the blood. Due to the presence of unabsorbed water in the gastrointestinal tract, a routine blood test becomes a low-concentration blood test. It is conceivable that the physical examination results are absolutely inaccurate. Because liver function tests require blood tests, and blood tests require fasting. The requirement for fasting is not to eat or drink water. Therefore, you cannot drink water before and during the physical examination unless blood is drawn.