Drinking water in the middle of the night is usually allowed to draw blood for examination. The results of blood test items such as blood routine, coagulation function and anemia six items are not affected by drinking water, and a small amount of drinking water will have little effect on the results.
As long as patients drink less than 200ml of water in the middle of the night, which has no obvious effect on the blood test results, they can draw blood for examination on the following day. It is recommended that patients perform renal function, liver function, fasting blood glucose, blood lipids and other tests in the fasting state, which is beneficial to the accuracy of the results; if the amount of water consumed in the middle of the night is greater than 200ml, it is not recommended to improve the above test items.
Drinking or eating in the middle of the night has no significant effect on the results of routine blood tests, coagulation function, anemia six tests, and so on, and it is possible to draw blood to improve the examination of these items.
It is recommended that patients follow the doctor’s instructions to make the relevant preparations before the test to ensure the accuracy of the test results.