The Combined Impact of Dedicated Trained Personnel and Insulated Containers on Maintaining the Red Blood Cell Cold Chain: A Prospective Observational Study

A BSTRACT Background: The integrity of the red blood cell (RBC) cold chain is critical for transfusion safety. The traditional “30-min rule” for RBC units outside refrigeration is often inadequate in real-world settings. Although personnel training is universally mandated, in many high-volume or resource-limited settings, blood units are frequently transported by untrained relatives or ad-hoc couriers. This study evaluated an integrated system combining dedicated trained personnel and insulated containers for maintaining RBC temperature during transport and ward holding. Methods: In a prospective observational study, 120 RBC units were allocated to one of two transport systems: (1) trained couriers using validated insulated containers, or (2) untrained couriers using plastic overwraps. Temperature exposure was monitored using irreversible temperature-time indicators (Timestrip®). Results: The integrated system maintained 65.0% of units within the ≤30-min temperature excursion threshold, compared to 36.7% in the ad-hoc system ( P < 0.001). No units were discarded in the integrated system, whereas 8.3% were discarded in the ad-hoc group due to excessive warming ( P = 0.024). Median cumulative temperature excursion was 30.5 versus 66.5 min ( P < 0.001). Conclusion: An integrated approach using continuous thermal protection and trained personnel significantly improves RBC temperature integrity and reduces wastage. This supports a shift from time-based rules to evidence-based, temperature-monitored cold chain management.