医护人员通过HIV 感染病人的血污染的针头和器械而感染HIV 的危险性虽小,但确实存在。这种危险性取决于病人的HIV 阳性率(f)、每次事故的传播概率(p)和持定时间内的事故数(n)。累计危险性为[1-(1-fp)~n]。作者调查了荷兰阿母斯持丹市一所500张床医院的外科医生及其他手术室人员,在手术室工作的 The danger of HIV infection among health-care providers through HIV-infected patients’ blood-stained needles and devices is small but does exist. The risk depends on the patient’s HIV positive rate (f), the probability of transmission of each incident (p) and the number of accidents (n) during the holding time. The cumulative risk is [1- (1-fp) ~ n]. The author investigated the surgeons and other operating room staff at a 500-bed hospital in Assam, the Netherlands, and worked in the operating room