I have a co-worker that repeatedly has an issue with including an Rh-control (i.e. 6% albumin) with AB,Rh-positive patients once it has been established on two different samples. My standpoint considering regulatory guidelines and product insert information is that when the ABO/Rh must be re-established on specimens used for transfusion purposes the Rh-control for AB, Rh-positive patients must be included to reflect the current serologial status of the patient. I would appreciate all input on how this testing aspect is perceived at other transfusion services. Thanks, Nick.