Why don't you get units from the supplier with pedibags attached, fill them, label them, and issue them in a bunch to the OR. you could do the sizes based on that the OR intends to use or by patient size or by max size of the syringe (Which we found out was 60 ccs). That way it is sterile. and expiration is life of unit. The OR could choose a pedibag and spike it with the syringe attachment. Include a second label for them to use.