AI and Blood Banking: Predicting Transfusion Demand - A Systematic Review of Forecasting Approaches.

Introduction: Accurate prediction of blood product demand is essential for maintaining adequate supply while minimizing wastage. Artificial intelligence (AI) and machine learning (ML) approaches have emerged as promising tools for transfusion demand forecasting across multiple scales, ranging from individual patients to regional supply chains. This review provides a structured overview of AI applications in blood banking, organized by prediction scope and clinical objective. Methods: We conducted a systematic review following PRISMA 2020 guidelines, searching PubMed and Scopus for studies published between January 2015 and December 2025. Studies applying AI or ML to transfusion demand prediction were included. We organized findings into a four-tier framework based on prediction scope and clinical goal and systematically compared technical approaches. Results: Out of 535 identified records, supplemented by a targeted search during peer review, 24 studies met inclusion criteria. The four-tier framework revealed distinct prediction challenges: (1) patient-individual prediction (goal: improve individual care quality) achieved areas under the curve (AUCs) of 0.45-0.97 across five studies for 24-h to 72-h prediction, (2) procedure-specific models (goal: optimize surgical blood ordering) achieved AUCs of 0.70-0.91 across six studies, (3) facility-level optimization (goal: reduce wastage and shortages) approximately halved platelet outdating rates and achieved mean absolute percentage errors as low as 4.18% across eight studies for daily to weekly forecasting, and (4) regional forecasting (goal: secure long-term supply) achieved Conclusion: AI-driven demand prediction offers substantial potential to improve blood supply management across all tiers of the blood supply chain. The choice of modeling approach should be guided by the prediction scope, available data infrastructure, and specific clinical objectives. Standardized external validation remains critical for clinical deployment.