title: [The relationship between PMI and concentration of potassium ion and sodium ion in swine aqueous humor after death].
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).
  
  
  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.
authors.affiliation: Department of Forensic Medicine, Zhongshan Medical College, Sun Yat-sen University, Guangzhou 510080, China.
authors.forename: Ju
authors.initials: J
authors.lastname: Han
authors.forename: Guang-biao
authors.initials: GB
authors.lastname: Yu
authors.forename: Ye-qiang
authors.initials: YQ
authors.lastname: Dong
authors.forename: Chao
authors.initials: C
authors.lastname: Fang
authors.forename: Hua-lan
authors.initials: HL
authors.lastname: Jing
authors.forename: Si-min
authors.initials: SM
authors.lastname: Luo
mesh_terms: 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
chemical_list: D012964:Sodium; D011188:Potassium