In response to your postings, Digi-Trax is a distributor of the Shockwatch product, and we just wanted to share some additional tips. When using the blood bag temperature indicators, it’s really important to keep the blood bags as far from the refrigerator door as possible. Opening and closing of the refrigerator door, even for a short period, can affect the temperature of the bag. Because the indicators read the core temperature of the bag, rather than the ambient air, one should place the tag where the greatest amount of blood resides (typically near the center of the bag, not the top). If any of you are having issues, and would like an on-site assessment to help you optimize your use of the blood temp indicators, please let me know. Also, Shockwatch is in the process of obtaining a 510(k) and anticipates having approval for this product in the next few months. Michelle