Abstract: Objective By analysis on characteristics of clinical blood use during the epidemic, it provides a reference for blood supply guarantee plan when the same epidemics occur in the future. Methods We reviewed blood use records of inpatient and emergency patient from January 21, 2020 to March 21, 2020 during the epidemic. Comparing with the same period last year, we analyzed blood use of inpatient and emergency patient. Result During the epidemic, the total amount of blood used in hospital was 10 616.3 U, and the total amount of red blood cells(RBCs) was 5 130.5 U (48.33%), of which the amount of blood used in outpatient and emergency patient was 1 410.5 U, and the amount of RBCs used was 1 037 U (73.52%). Compared with the same period last year, the total amount of blood used decreased by 5.88%, and RBCs decreased by 5.47%. RBCs amount in outpatient and emergency department accounted for 20.21% of total blood amount, compared with 13.23% in 2019. During the epidemic, the average RBCs amount per person and the rate of RBCs used were statistically significant, compared with the same period last year. The results also showed that RBCs amount in outpatient and emergency patient was mainly used by patients with gastrointestinal bleeding and hematological disease, and the blood amount used by patients with multiple injuries decreased significantly compared with the same period last year (90.38%). Among hospitalized patients, RBCs amount in surgical patients was significantly lower than that in patients treated with blood. Conclusion During the epidemic, our hospital significantly reduced total blood use. The amount of RBCs significantly increased in outpatient and emergency patient, but significantly decreased in patients with multiple injuries.

Key words: Epidemic, Clinical, blood, Emergency, patient