Key result
Preoperative blood ordering for elective surgeries significantly exceeded actual clinical needs, with only 1,092 (34.8%) of the 3,133 requested blood units being transfused.
Observational (n=2,170)
No
Routine over-ordering of blood for elective surgeries leads to unnecessary crossmatching, highlighting the need to implement and regularly update a Maximum Surgical Blood Order Schedule (MSBOS).
Blood over-ordering was common before elective surgery; supports MSBOS evaluation but remains hypothesis-generating.
For elective surgeries over ordering of blood is a common practice. The goal of the Maximum Surgical Blood Order Schedule (MSBOS) is to promote efficient use of blood. The purpose of this Portuguese study is to analyse the crossmatched blood units for elective surgery and the real amount of transfused blood, the crossmatch:transfusion rate (C:T) which must be less than 2.5. As in other Blood Banks, the differences are more evident in the situations in which the need for blood is very small, the so called Type and Screen. MSBOS should be re-evaluated regularly because of operative environment such as surgeons, operative methods, haemostatic drugs and preoperative conditions of patients can change.
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Oliveira et al. (2007) conducted an observational in Elective surgeries (n=2,170). Preoperative blood ordering vs. Actual blood transfusion needs was evaluated on Crossmatch to transfusion (C:T) ratio and percentage of requested blood units actually transfused. Preoperative blood ordering for elective surgeries significantly exceeded actual clinical needs, with only 1,092 (34.8%) of the 3,133 requested blood units being transfused.
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