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
Still it is not advisable to take it after the expiry date written on the bottle. This is just for your information to let you know that you are safe. Anyway Saline Nasal spray is not going to do any harm even if you used an expired one. So forget about it.
Posted. More to the question, test strips do expire, meters are just electronic devices, but should be calibrated and checked for accuracy. If test strips were included with the meter the expiration date likely was referring to the test strips, not the meter. Test strips typically come in a small plastic can or bottle, and the bottle should be stamped with the expiration date. 1  Back to top.