When we aliquot an apheresis product we get a full face label for the aliquot and a quandrant 3 & 4 label for the parent unit stating the new product volumes of each. The product description on the original label includes "xxx mL containing approx ___ml ACD-A" with a value handwritten in the blank space. Our aliquot labels have this same wording on them. When you label your aliquot or add the quadrant 3&4 label to the original bag what do you do with the handwritten anticoagulant volume? Leave it blank on both (even though you are covering up the original on the parent unit)? Calculate the ratio for each aliquot? Copy the original total volume back onto the label for the now lower volume parent unit? (With additional aliquots this value will get more and more inaccurate.) I doubt this really matters but I would like to know what others do.