Abstract: Objective To investigate and analyze the changes of postmortem human biochemical indexes. Methods Subclavian venous blood samples were collected from 81 cases of traffic fatalities. Thirteen blood biochemical indexes including liver function （ALT, AST, TBIL and DBIL）, renal function （UA and Cr）, cardiac function （CK, CK-MB and LDH）, electrolytes （K+, Na+ and Cl-）, and glucose （GLU） were tested by Roche cobas c311 automatic biochemical analyzer. The descriptive analysis was made by SPSS 17.0 statistical software. Results The values of ALT, AST, CK, CK-MB, LDH and K+ were higher than normal reference values with more fluctuations. The values of TBIL, DBIL, UA, Cr, Na+, Cl- and GLU were relatively stable with less fluctuations. Conclusion The postmortem human blood biochemical indexes of liver function, renal function, cardiac function, electrolytes and glucose could be affected by the factors, especially hemolysis and autolysis. The biochemical indexes, particularly enzymes, increased significantly with higher standard deviation.

Key words: forensic pathology, postmortem changes, blood, biochemical indexes