Legal analysis: according to the degree of personal injury to patients, medical accidents are divided into four levels:

First-class medical accident: causing death or serious disability of the patient;

Secondary medical accident: moderate disability and severe dysfunction caused by organ and tissue damage;

Third-class medical accidents: causing mild disability of patients, organ and tissue damage leading to general dysfunction;

Four-level medical accidents: other consequences that cause obvious personal injury to patients.

Legal basis: Article 4 of the Regulations on Handling Medical Accidents is divided into four levels according to the degree of personal injury caused to patients:

First-class medical accident: causing death or serious disability of the patient;

Secondary medical accident: moderate disability and severe dysfunction caused by organ and tissue damage;

Third-class medical accidents: causing mild disability of patients, organ and tissue damage leading to general dysfunction;

Four-level medical accidents: other consequences that cause obvious personal injury to patients. Specific grading standards shall be formulated by the health administrative department of the State Council.