Blood storage effect of blood transportation boxes made of phase-changed material in extreme cold region of the plain / 军事医学

ABSTRACT

Objective To analyze and evaluate the blood preservation effect of two types of blood transportation boxes under field conditions in extreme cold regions of the plain.Methods Before experiment,the hematocrit,hemoglobin(Hb) and free Hb content,Na+and K +of samples of suspended red blood cells(RBCs)were detected and the sterility test was conducted.One of the two boxes was a field blood transportation box that served as control, while the other was made of phase-changed material of two types—1#and 2#.The suspended RBC samples were preserved in the low-temperature blood refrigerators and the two types of boxes respectively and transported under outdoor environment temperatures of -20 --5℃for 2 h.After that,the changes in the blood storage device temperature were recorded after 0,12,24,36,48 and 60 h.Results The suspended RBC preservation time in the field blood transportation box was 42 h vs 58 h in the blood transportation box made of phase-changed material.But their hemolysis rate,Na+,K+and the sterility test all were up to national standards.Conclusion In the extreme cold regions of the plain, the blood transportation box made of phase-changed material can be used to preserve suspended RBCs.