This issue has been debated here for several months, and the answer is that IgG Gel cards are not labeled by the manufacturer for the purpose of detecting ABO incompatiblity. Period. You cant in-house validate them for this puspose either, and be in compliance with CMS, FDA, or AABB. I attach an article from the AABB assessor newsletter which explains it nicely, I think. Also, the vendor for our IgG gel cards recently sent out a memo to this effect as well, so there should be no more confusion about the why and the wherefores on this subject! To Gel Crossmatch or Not To Gel Crossmatch.doc