[The relationship between PMI and concentration of potassium ion and sodium ion in swine aqueous humor after death].
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).


CONCLUSIONS
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.
Han
Ju
J
Department of Forensic Medicine, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China.
Yu
Guang-biao
GB
Dong
Ye-qiang
YQ
Fang
Chao
C
Jing
Hua-lan
HL
Luo
Si-min
SM
D000818:Animals; D001082:Aqueous Humor / Q000737:chemistry*; D005260:Female; D049429:Forensic Pathology / Q000379:methods; D008297:Male; D011180:Postmortem Changes; D011188:Potassium / Q000032:analysis*; D012044:Regression Analysis; D012964:Sodium / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods; D013552:Swine; D013696:Temperature; D013997:Time Factors
D012964:Sodium; D011188:Potassium