Abstract: By reviewing five medical tangle cases after traumatic injury,the characters of these cases and the cause of medical malpractice had been discussed.After the analysis of the responsibility to the death caused by traumatic injury and medical malpractice,the assessment principle of cooperative competition of causes and degree of participation had been introduced.Meanwhile,it is believed that if comprehensive postmortem examination and pathologic examination were carried out to verify the death cause at first,they would play more important role in the appraisal of medical tangle cases after traumatic injury.

Key words: forensic medicine, traumatic injury, diagnostic errors, medical dispute