At the 2009 AABB Ask The Standards Committee session the AABB has taken the position that blood sent to the OR in coolers is transport, not storage or temporary storage. AABB also changed the language regarding every 4 hour temperature monitoring, stating that the cooler needs to be validated for the time and temperature of its use. This entire transcript may be found at our website: http://www.williamlabs.com/Vuepoint-Feb2010.html Ed Sharpless, William Laboratories