Can I drink water before the employment physical examination? How much can I drink?

Employees are generally required to undergo a health examination before joining the company, and can only take up their posts after obtaining a health certificate. Routine physical examinations generally include blood tests, urine tests, liver function tests, X-rays, internal medicine examinations, electrocardiograms, etc. Blood and urine tests are best performed on an empty stomach, so it is best to go to the testing agency as soon as possible after getting up in the morning for the pre-employment physical examination. Remember not to eat breakfast before that, and there are also restrictions on drinking water.

Do not drink water before the physical examination

It is necessary not to eat before the physical examination, but many people are not very clear about whether they can drink water. In fact, in this case, don't deliberately not drink water. You can drink a small glass of water (about 200 ml) after getting up on the day of the physical examination to ensure the necessary water for the human body. There is still some time before you arrive at the physical examination center. The human body can completely absorb the water, which will not affect the results of the physical examination. However, you cannot drink water after arriving at the physical examination institution, because the physical examination includes routine blood and urine tests, and drinking water will have some impact on the results of these tests. You can drink water and eat after completing all the fasting examination items.

Reasons for not drinking water before a physical examination

1. Drinking water before a physical examination will affect liver function tests because drinking water will increase blood volume and cause an increase in blood volume blood pressure. 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.

2. Because functional activities and metabolism are slow at night. Generally, physical examinations are done in the morning. If you drink water in the morning, it will speed up your metabolism, which will affect the accuracy of the physical examination results.

You cannot eat before the physical examination. If possible, try not to drink water to avoid affecting the results of the physical examination.

It should be noted that in addition to not eating breakfast and drinking water on the day of the physical examination, you should also start to maintain a light diet and a regular schedule three days before the physical examination, especially avoid high-fat foods, and stop eating after dinner the day before the physical examination. Try not to eat dinner too late to ensure that the dinner eaten the day before can be completely digested by the time of the physical examination. It usually takes 8 hours to digest food.