Transfusion of Packed Red Blood Cells

Pre-Transfusion Requirements

PRBCs must be crossmatched before transfusion to confirm ABO compatibility and screen for other antibodies in the recipient, as recommended by the National Comprehensive Cancer Network 1, 2

Order exactly 1 unit of PRBCs at a time rather than ordering multiple units simultaneously, following the standard approach recommended by the American College of Physicians and National Comprehensive Cancer Network 1, 2, 3
After the first unit is completed, reassess the patient clinically before deciding whether to order an additional unit, as suggested by the National Comprehensive Cancer Network 1, 2, 3

Premedication with acetaminophen or antihistamines is seldom required for patients not planned for long-term transfusion, according to the National Comprehensive Cancer Network 1, 2
If repeated transfusions are anticipated, consider leukocyte-reduced blood and premedication to minimize adverse reactions, as recommended by the National Comprehensive Cancer Network 1, 2

Document baseline vital signs (temperature, heart rate, blood pressure, respiratory rate) before starting the transfusion, and monitor vital signs at 15 minutes after starting the transfusion and again at completion, as standard protocol 3, 4

Each 300 mL unit of PRBCs typically raises hemoglobin by 1 g/dL or hematocrit by 3% in normal-sized adults without ongoing blood loss, as reported by Praxis Medical Insights 4
No mandatory waiting period exists between units for stable patients—the decision to transfuse additional units should be based on clinical reassessment, not arbitrary time intervals, according to Praxis Medical Insights 3

Avoid routine volume reduction of PRBCs, as 15-55% of platelets are lost during additional centrifugation steps, as noted in the Journal of Clinical Oncology 5
Do not assume transfusion corrects underlying iron deficiency—obtain pre-transfusion iron indices and provide supplemental iron therapy if needed in the 90 days following transfusion, as recommended by Praxis Medical Insights 4
Be aware that PRBC transfusion carries risks including increased venous thromboembolism (OR 1.60), arterial thromboembolism (OR 1.53), and mortality (OR 1.34) in cancer patients, as reported by the National Comprehensive Cancer Network 1, 2