Evaluation of hypostasis using a colorimeter measuring system and its application to assessment of the post-mortem interval (time of death) |
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| Affiliation: | 1. School of Applied and Engineering Physics, C7 Clark Hall, Cornell University, Ithaca, NY 14853, USA;2. Department of Clinical Sciences, Cornell University, Ithaca, NY, USA;3. Department of Biomedical Engineering, Cornell University, Ithaca, NY, USA;4. Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA;5. Department of Physics, Cornell University, Ithaca, NY, USA;1. Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, Hunan, China;2. Cancer Research Institute, School of Basic Medical Sciences, Central South University, Changsha 410013, Hunan, China;1. Office of the Chief Medical Examiner, 720 Albany Street, Boston, MA 02118, United States;2. Boston University School of Medicine, 72 E. Concord Street, L1004, Boston, MA 02118, United States;1. Institute of Legal Medicine, University Hospital Düsseldorf, Germany;2. Institute of Mathematics, Heinrich-Heine-University, Düsseldorf, Germany;3. Department of Neurosurgery, University Hospital Düsseldorf, Germany;1. University of Bonn, Institute of Forensic Medicine, Bonn, Stiftsplatz 12, 53111 Bonn, Germany;2. Monash University, The Systems Biology Institute (SBI Australia), Level 1, Building 75, Wellington Road, Clayton, VIC 3800, Australia |
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| Abstract: | Hypostasis was measured in 93 cadavers using a tristimulus colorimeter in order to investigate its relationship with the time of death. The intensity (lightness) of the hypostasis in each case was measured over a period of 4 h and the rate of change in lightness derived. When examined against the time of death, it was found that there was a good correlation between the two. Namely, that the rate of change of lightness (and it can be inferred that this represents displaceability) decreases as the post-mortem period increases. The shift in hypostasis was particularly marked in the first 12 h and decreased thereafter. However, hypostasis could be useful for time of death estimation for up to 48 h. After this time, the degree of change was small or non-existent and by 72 h hypostasis had become fixed in the majority of cases, within our measuring period of 4 h. |
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