i really need your help we are using this formula since i came here in blood bank to get the percent recovery: final hct x vol of PRBC X 100 orig. hct x vol of prbc i always get more that 100% for my CPDA1 blood bag please correct me if am worng in doing this procedure we are using manual plasma extractor. After centifuging the blood bag at high speed (CPDA1-because we are currently using double bag) we are leaving at least 1/2 to 1 inch plasma for CPDA1 bag. mix well until the prbc are homogenous after which releasing adequate amount of prbc into the segment, seal, cut and measure the hematocrit in our CellDyn 3700. the measurement of post hct is greater than the pre hct. these are my datas: final hct = 51.3 % original hct. = 40 % volume of whole blood = 446 mL volume of PRBC = 212 mL using the formula we have i always get more than 100% but the percent recovery of CPDA1 blood bags should only have less than 80%. I hope and wish that you can help me with this problem. Thank you very much.
in our hospital we give O NEG blood though the patient have a known blood type for emergency release, until they can give a blood specimen for blood typing and then do the emergency cross-match for the succeeding blood units to the specific blood type