无偿献血是我国输血事业发展的方向,也是社会文明和进步的重要标志。近年来随着上海市临床医疗水平的不断提高、外省市来沪患者逐年增加及人口老龄化程度上升,用血量也逐年增加。在上 Unpaid blood donation is the direction of the development of blood transfusion in our country and an important symbol of social civilization and progress. In recent years, with the continuous improvement of the level of clinical medical care in Shanghai, the increase in the number of patients from other provinces and cities to Shanghai, and the increase in the aging of the population, the amount of blood used has also increased year by year. above