According to the latest AABB Technical Manual, (which I was reading lately), I remember seeing that blood warmers were used in the context of hypothermia. As I recall, that was the only time Blood Warmers were mentioned. I could be wrong. It is interesting to see how institutions use blood warmers and what the process and procedures are at any any given institution. My last Bloodbank Job was at a moderate sized open heart facility and there was question as to running blood warmers in Surgury where the patients body temp was brought down. I think the new Blood Bank Supervisor at the time did reserach and came to the conclusion that blood warmers are not needed, even in the event of the patient haveing a cold auto. Again I could be wrong. Please confirm that.