1. Shock patients such as shock caused by excessive blood loss, or shock caused by pain... etc.

2. Patients who have had gastrointestinal bleeding or coagulation system problems in the past use blood-activating drugs without checking, resulting in a series of problems.

3. Patients with past hypertension, heart disease, etc.

4. Pregnant women, children, etc.

In fact, the risk of hand surgery is very low. As long as you pay more attention when you encounter the above situation, there will be almost no critical illness.