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  • Title: [The relationship between PMI and concentration of potassium ion and sodium ion in swine aqueous humor after death].
    Author: Han J, Yu GB, Dong YQ, Fang C, Jing HL, Luo SM.
    Journal: Fa Yi Xue Za Zhi; 2010 Apr; 26(2):88-90. PubMed ID: 20653131.
    Abstract:
    OBJECTIVE: To explored the relationship between the concentration of potassium ion as well as sodium ion in the aqueous humor and post-mortem interval (PMI). METHODS: The concentrations of potassium ion and sodium ion in the aqueous humor of swine within 48 h after death at 4 degrees C and 28 degrees C were detected using Z-500 atomic absorption spectrophotometer. RESULTS: The concentrations of potassium ion and sodium ion in aqueous humor of isolated swine eyeballs within 48 h after death when the environmental temperature was 4 degrees C were significantly related to PMI. The relationship between PMI and the concentration of potassium ion was PMI = -0.178[K+]2 + 49.978 (R2 = 0.995). The relationship between PMI and the rate of sodium ion and potassium ion was PMI = 120.987/[Na+/K+]-28.834 (R2 = 0.905). CONCLUSION: The concentration of potassium in aqueous humor of isolated swine eyeballs may be one of the reference indicators to estimate PMI of the corpses at lower temperatures.
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