Incomplete knowledge and weak awareness of risk prevention. The reason why nurses can't fully answer the content of blood transfusion is because they don't fully grasp the knowledge, keep the relevant knowledge in mind, realize the seriousness of the content risk and understand their own protection.

There are nine pairs of blood transfusion examinations by nurses, namely, three examinations are during and after drug preparation, before drug delivery, injection and disposal, and after drug delivery, injection and disposal. Nine pairs are bed number, name, sex, drug name, concentration, dosage, usage, time and expiration date.