Abstract
Background and Objectives
Blood transfusion plays an important role in cardiac surgery. Cardiac surgery, though being practiced for only a minority of hospitalized patients, accounts for the use of more than 80% of blood components.
 
Materials and Methods
A prospective study was carried out during October 2015 to March 2016 in Shahid Modares Hospital. Blood utilization trends in different types of cardiac surgery were observed and the variables such as age, gender, Hemoglubin (Hb), Hematocrit (Hct), Body Surface Area (BSA) and their effects on transfusion were studied. Data were analyzed by SPSS (version 22) software. K2 test and Mann-Whitney U test were used.
 
Results
The patients with Hb and Hct levels lower than 11 gr/dL and 33% were the ones who received transfusion more than the others (p value < 0.001). Type of surgery affected the use of blood. The most common surgery in our study was CABG (71.6%)  that accounted for the use of 1 to 7 units (the mean rate of 3.3 units).
 
Conclusions 
A lower number of blood units was shown to be administered during surgery to the patients with higher Hb and Hct levels and larger BSA.