The aim of the present study is to determine the effectiveness of hemovigilance module training given to nurses.

125 nurses from the clinic and intensive care units, who received the most intensive blood transfusion from two different hospitals, were included in the study as the intervention and control groups. The control group was not trained. Only the pretest was administered one week after the posttest. After the pre-test was applied to the nurses in the intervention group, five modules of training, which lasted four hours, were given using interactive methods. Five modules of training were prepared by the researcher. These five modules are the 1st module of training; definition of hemovigilance, its aims, the development of hemovigilance in the world and in Turkey, and legal legislation, Module 2; Donor selection, Blood donation Process, Phlebotomy and Donor reactions, Module 3; blood, blood transfusion, its purpose, properties of blood and blood components, Blood transfusion process, Module 4; acute and delayed transfusion reactions and management, Module 5; It consists of the national hemovigilance system, the organization of the hemovigilance system at the hospital level, Traceability, Trace-back from the Patient to the Donor, and Look-back from the Donor to the Patient. the training was over, the final test was administered. One month later, this test was repeated.

Inclusion Criteria:

She/He voluntarily agrees to participate in the research, Working as a nurse in the clinic and intensive care unit where blood transfusions are the most, Working for at least 6 months,

Exclusion Criteria:

Nurses working in the emergency and operating rooms, in clinics where blood transfusion is not performed the most, Being a new nurse, On maternity leave and maternity leave, Having an external assignment, Nurses working in the polyclinic,

None (Open Label)