C.H. Hyun1, T.H. Song2,
K.Y. Sim3, N.J. Kim4, D.S. Kim5 and
Republic of Korea
31540, Republic of Korea
Provincial Police Agency, Suweon, 16218, Republic of Korea
Police Agency, Busan, 47545, Republic of Korea
Republic of Korea
Author Email :
Aim: The aim of this
study was to test the effects of Korean floor-heating system on heat loss
using adult pig models, and to create a novel formula for estimating time
since death during the early stages of decomposition.
Methodology: Three electric
mattress pads were placed on the ground to maintain a constant temperature of
the substrate like the ondol heating system. Four temperature measuring
probes were placed in each pig: inside the rectum, on the body surface,
between the body and the surface of mattress pad and on the mattress pad. The
probes were connected to a temperature data logger system. Temperature was
recorded every minute and statistical analysis was performed using the SAS
(version 9.3) program.
Results: Spearman's Rank
Correlation results demonstrated the rectal temperature, and the temperature
between the body and the surface of pad were strongly correlated with
postmortem cooling of the body, rather than ambient temperature. The rate of
cooling of the body is represented by a cube function of time rather than an
exponential or bi-exponential function.
Interpretation: This research
indicates that postmortem cooling of the body is more influenced by ground
surface temperature than by ambient (environment) temperature, and the rectal
temperature fluctuated with the ambient temperature. Additionally, the study
showed that pigs can be good animal models that can substitute human cadaver
to study the process of decomposition.
Key words: Animal model, Body cooling, Pig, Postmortem interval