From August 2017 to January 2021, 4 cases of severed fingers were treated at the Department of plastic hand surgery,the First People's Hospital of Bijie Municipal, including 2 cases of avulsion and 2 cases of rotational avulsion. The blood vessels were sutured by two-point anastomosis. Whas sutured.en the blood vessels were sutured, heparin sodium normal saline (12500u heparin sodium injection plus 50ml 0.9% sodium chloride injection) was used to flush the lumen. After blood circulation, the sutured blood vessels were sutured again. The bleeding was not effectively stopped in the wound and the wound w