Through coagulation, immunity, liver and kidney function, blood sugar and so on. We can test whether the body is suitable for surgery or timing. By drawing blood, we can know whether there is a blood-borne infectious disease and the patient's blood type, so as to facilitate blood preparation for massive bleeding during operation.

Guiding opinions:

It is often necessary to draw blood before operation, because it is necessary to test whether the physical condition is suitable for surgery or timing by four items of coagulation, eight items of immunity and blood sugar of liver and kidney function. By drawing blood, we can know whether there is a blood-borne infectious disease and the patient's blood type, so as to prepare blood for massive bleeding during operation.