RESUMEN
Haemovigilance is defined as a set of surveillance procedures from the collection of blood and its components to the follow-up of recipients, denoted to collect and assess information on unexpected or undesirable effects resulting from the therapeutic use of labile blood products, and to prevent their occurrence or recurrence. In this system the complications of blood transfusion are systematically collected and reported and data of adverse effects of blood transfusion are analyzed and a series of corrective measures are performed to prevent the recurrence of them. Another goal of haemovigilance is documentary collections of blood transfusion cases which eventually leads to conducting and promoting blood transfusion in hospitals. Haemovigilance only works if complications of blood transfusion are early detected and reported