Surgery, after hematology, is the biggest consumer of homologous plate
let concentrates. Platelet transfusion is indicated to prevent or cont
rol bleeding associated with deficiencies in platelet number or functi
on. In surgery, general patterns (in function of pre-surgery platelet
count) can be adopted in most of the indications for platelets. In eme
rgency situations, and in some particular cases (related to the patien
t, the type of operation, etc.), the transfusion procedure depends on
the team's experience, the results of the available clinical and biolo
gical tests, and the drugs. Strict monitoring is required during the t
ransfusion procedure. The efficacy of the transfusion must be controll
ed 1 h and 24 hours after the transfusion, and a number of factors mus
t be assessed, namely the immunological impact of the transfusion (on
red blood cells, leukocytes and platelets) and the occurrence of infec
tious diseases transmitted via transfusion. In addition, for a possibl
e future transfusion, a strategy must be proposed.