Scientific Journal of

Abstract
Background and Objectives
Blood products are important to many patients. Due to excessive demand for blood, which causes blood loss and increases the cost of treatment and the workload of the blood bank, it is necessary to consider the demand and consumption rates of blood products.

Materials and Methods
In this descriptive study, blood request forms were examined for individuals over 18 years of age referred to Imam Sajjad Hospital in Ramsar from January 2019 to January 2020. Data were analyzed by SPSS software version 25 and Chi-square Test. Descriptive statistics (frequency, percentage, and mean) and blood transfusion indices including cross-matched to injected blood ratio (C/T), blood transfusion index (TI), and blood transfusion probability (T%) were calculated.

Results
3111 blood request forms were reviewed. Out of 7640 units of requested blood, 5051 units (66.11%) were injected into patients. Among the hospital sectors, gynecology department with 58 units (1.1%) had the lowest frequency of consumption of packed RBCs. The overall C⁄T ratio was calculated to be 1.56. Overall TI was 1.22 and T٪was 65.82%.

Conclusions 
This study showed that the ratio of transfusion indices was appropriate for all departments of Imam Sajjad Hospital in Ramsar except for gynecology. Due to the high demand for blood compared to consumption, unnecessary requests can be significantly reduced by properly examining patients and applying the principles of blood ordering.