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[Correlation between postmortem intervals and the changes of electrical conductivity in vitreous humor in rabbits
Rui-Qing Zhou1, Fu Zhang, Ye Wang
1West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China. rq1983@sina.com.cn
Objective:
To investigate the correlation between postmortem interval (PMI) and the changes of electrical conductivity in vitreous humor in rabbits after death.
Methods:
The changes of electrical conductivity in vitreous humor in rabbits were measured using the conductivity meter under 30 degrees C during 0-48 hours and 20 degrees C during 0-120 hours after death.
Results:
Electrical conductivity in vitreous humor in rabbits increased gradually under 30 degrees C and 20 degrees C from 0 to 48 hours and from 0-120 hours after death. The formulae of the relationship between PMI and conductivity under 30 degrees C and 20 degrees C were obtained by statistical analysis and the correlation coefficients were 0.970 and 0.983 (both P < 0.01), respectively.
Conclusion:
The increase of electrical conductivity in vitreous humor in rabbits after death may be used as the relatively objective parameter for PMI estimation.
