Massive Transfusion Protocol Activation Does Not Result in Preferential Use of Older Red Blood Cells

Figure 3

Median age of RBC units categorized by ABO type of unit. Storage ages of RBCs were computed for all transfused units as divided by ABO type. ER, emergency release; nER, nonemergency release; O+, O-positive; O−, O-negative, A+, A-positive; A−, A-negative; B+, B-positive; B−, B-negative; AB+, AB-positive; when compared to O+ group.