Introduction: COVID-19 disease spread rapidly worldwide, causing a pandemic. In this study, we aimed to explore the distribution of blood products in our blood center before and during the pandemic by blood type. Material and Method: In this study, we retrospectively analyzed 4,271 blood products (1,290 patients) transfused before and during the pandemic through the medical records of Kastamonu Training and Research Hospital Blood Transfusion Center. Moreover, we investigated the associations between transfusions and age, sex, blood type, and COVID-19 infection. Results: The findings revealed that the majority of the patients receiving transfusions both before and during the pandemic were A Rh (+) (41.4%). Besides, the rates of those with O Rh (+) were 28.8% and 28.7% during the pandemic. In addition, 37 products (28 erythrocyte suspensions, 7 fresh frozen plasma, 2 pooled platelet suspensions) were transfused on 17 patients with confirmed COVID-19. Conclusion: Transfusions have an important place in the treatment of critically ill patients. The blood type A Rh (+) was previously shown to be associated with an increased risk of COVID-19 infection. In this study, although we realized that products of blood type A were mostly used in general transfusions, transfusions in the pandemic were performed predominantly with blood products of infected patients with blood type O. The modern world is more likely to encounter further pandemics in the future. We think that each region should evaluate its own centers.

Aim: Coronavirus disease-2019 (COVID-19) disease which is unknown how much it will affect the work of hospitals, has caused a pandemic all over world. The decrease in donations due to pandemic required regulation of blood supply in hospitals. In our study, we aimed to evaluate the blood center of our hospital during the pandemic period.Methods: Patients' records of our hospital blood transfusion center were reviewed retrospectively before and during the pandemic. The patients were divided into two groups as pre-pandemic (11 March-30 June 2019) and pandemic period (11 March-30 June 2020). The groups were compared in terms of age range, gender, blood type, blood type of products, diseases causing transfusion, blood/ blood products transfusion/counts, transfusions performed to COVID-19 patients.Results: Four thousand two hundred seventy-one blood product transfusions were performed on 1,290 patients. Evaluation of diseases that cause transfusion among statistically significant groups in some diseases such as gastrointestinal diseases, genitourinary system diseases, infectious diseases and other diseases was determined. Conclusion:While a decrease in our transfusion rates was observed during the pandemic period, the increase in gastrointestinal system diseases is a striking result. The modern world will encounter these and similar pandemics in the future and we think that each region should evaluate its own blood centers in order to prepare for them.