l引言在临床实践中，在主任查房、教授查房、专家会诊等上级医生指导诊断治疗的情况下，如果发生医疗事故的话，就需要区分、界定上下级医生的责任。下面这个本人代理的案件就有助于我们了解这一问题。Z案清简介1996年3月23日，患者郭X患乳＠庙在X市X区X医院施行乳腺切切除手术 l Introduction In clinical practice, in the case of the director’s rounds, professor’s rounds, expert consultations and other higher-level doctors to guide the diagnosis and treatment, if a medical accident occurs, it is necessary to distinguish and define the responsibilities of the superior and subordinate doctors. The following case, which I represent, helps us understand this issue. Z Zhe Qing Profile On March 23, 1996, the patient Guo Xianxu @ Temple performed X-ray mammectomy in X-zone Hospital, X City.