Hello all! I need your guidance, please. My current policy states that blood components may be returned to the Blood Bank within 30 minutes of issue as long as certain requirements are met. I've been reading the 17th Edition of the AABB Technical Manual, and I'm confused. According to Chapter 9, "if individual unit temperature indicators or reading devices are not being used, or if the blood components are not being returned in validated transport containers, acceptable time frames for returning blood components to inventory should be validated by individual facilities". We don't use temperature indicators on each unit of blood, and we simply use plastic bags to transport the unit to the floor. To my knowledge, the prior Blood Bank Supervisor at my facility did not perform any validation regarding this 30-minute time frame. I think she simply used the recommended time frame in the prior editions of the Technical Manual as a reference. How did you validate the time frame for returning blood components to inventory? Also, one additional question...Do any of you define a maximum number of units that staff can enter into inventory at one time? I have limits on the maximum number of units that can be stored in the OR cooler, but I do not define how many units a tech can enter into inventory at any one time. Of course, we're a rural hospital. Our routine blood order usually does not exceed 25 units. When I enter units into inventory, I never process more than 10 units at a time. However, this has not been validated and is not defined in my current policy. If I'm reading correctly, Chapter 9 seems to suggest that I need to define this in my policy. I appreciate any input you can provide! I have lots to learn. Thanks in advance.