Storage System
During the first six months, a Coleman Performance 28-Quart Wheeled Cooler (Coleman Company, Chicago, IL) was packed with corrugated foam and gel packs stored at -30 °C. This cooler was validated to maintain three pRBC units at a temperature range of 1 to 6 °C for 4 hours (Figure 2). During the following fifteen months, three pRBC units were stored using a Crēdo ProMed 4-Liter Series 4Cooler (CR04A4472, Pelican BioThermal, Plymouth, MN) packed with thermal isolation chamber (TIC) panels with phase change material and vacuum insulation panel (VIP) components, which is validated to maintain a temperature range of 1 to 6 °C for 72 hours (Figure 3).