We have a 50 bed NICU supply leuko-reduced, irradiated red cells routinely. We only wash for kids weighing less than 5 kg in open heart surgery. anesthesia worries about the potassium in these tiny babies with such large volumes being given. We don't worry about CMV status because everything is leuko-reduced. How would you handle washing for aliquots, the unit would outdate in 24 hours and the rest would be wasted? Our policy is that we don't share units between babies, and we try to limit donor exposure as much as possibel for neonates so once a kid starts a unit, they own it until outdate.