When incompatible blood is given, antibodies and complement in the recipient plasma attack the antigens on the donor RBC. Hemolysis ensues The antigen-antibody complex activate the Hageman factor (factor XII), which acts on the kinin system to produce bradykinin
Three years. The month and year of expiration is reflected on the individual packets and the outside of the box directly under the âDrug Factsâ section. Due to the high demand, all of our saline has been purchased long before it approaches expiration. more.
Best Answer: They have an expiration date because they have chemicals in them they will lose their potency if they are not used it time, and they will dry out and become useless. It doesnt matter if they stay in the packet, not opened, ,they will still expire, same as food...lol. Source(s): amanda Â· 7 years ago.