The blood routine is a blood system examination that is more commonly done in the clinic. The standard blood collection tube is within 2-5ml, which can basically meet the blood requirements of the clinical laboratory for routine examinations of 2-5ml, and can also basically diagnose diseases and achieve a more standard blood volume. However, some special blood tests require relatively more blood, for example, for the need to cultivate the blood system for infection, it may be necessary to take the blood for routine blood sampling, which may reach 10ml or more, so how much blood is drawn for routine blood is relatively fixed around 3ml to meet the requirements, for some special blood tests, the amount may be slightly more, this and the disease requirements or This is closely related to the requirements of the disease or the test required.