Estimation of the time since death (by brain temperature, C. Henssge)
Time since death calculator.
Warning: The creators and developers of the site and the program do not accept any responsibility for the calculation results and their implications.
Calculations are carried out by a formula Brown & Marshall in modification C. Henssge (Henssge, C., and B. Madea. Estimation of the time since death in the early post-mortem period. Forensic science international 144.2 (2004): 167-175.):
(Tbrain - Tambient) / (37.2 - Tambient) = 1.135 e-0.127t - 0.135 e-1.07t
- t - post-mortem interval (h);
- Tbrain - brain temperature (C°).
Up to 6.5 h post-mortem the most precise computation of time of death was achieved by the exclusive application of brain temperature, which gave a time of death within ±1.5 h (95 % confidence limits). Between 6.5 and 10.5 h postmortem the brain/rectum combined computation of time of death balanced in the ratio of 6 to 4 was the most precise one, at ±2.4 h. Beyond 10.5 hpm, the most precise computation of time of death was achieved by exclusiveapplication of rectal temperature, and gave a time of death within ±3.2 h.
Where the Henssge method must not be used:
- - strong radiation (sun, heater, cooling system);
- - repeated extensive climatic changes;
- - uncertain severe changes of the cooling conditions during the period between the time of death and examination;
- - the place where the body was found is not the same as the place of death;
- - suspicion of general hypothermia.
Discuss in the Forensic medical forum (russian).