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Sensitivity of temperature-based time since death estimation on measurement location
Rectal temperature measurement (RTM) from crime scenes is an important parameter for temperature-based time of death estimation (TDE). Various influential variables exist in TDE methods like the uncertainty in thermal and environmental parameters. Although RTM depends in particular on the location o...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10567880/ https://www.ncbi.nlm.nih.gov/pubmed/37336822 http://dx.doi.org/10.1007/s00414-023-03040-y |
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author | Subramaniam, J. Shanmugam Hubig, M. Muggenthaler, H. Schenkl, S. Ullrich, J. Pourtier, G. Weiser, M. Mall, G. |
author_facet | Subramaniam, J. Shanmugam Hubig, M. Muggenthaler, H. Schenkl, S. Ullrich, J. Pourtier, G. Weiser, M. Mall, G. |
author_sort | Subramaniam, J. Shanmugam |
collection | PubMed |
description | Rectal temperature measurement (RTM) from crime scenes is an important parameter for temperature-based time of death estimation (TDE). Various influential variables exist in TDE methods like the uncertainty in thermal and environmental parameters. Although RTM depends in particular on the location of measurement position, this relationship has never been investigated separately. The presented study fills this gap using Finite Element (FE) simulations of body cooling. A manually meshed coarse human FE model and an FE geometry model developed from the CT scan of a male corpse are used for TDE sensitivity analysis. The coarse model is considered with and without a support structure of moist soil. As there is no clear definition of ideal rectal temperature measurement location for TDE, possible variations in RTM location (RTML) are considered based on anatomy and forensic practice. The maximum variation of TDE caused by RTML changes is investigated via FE simulation. Moreover, the influence of ambient temperature, of FE model change and of the models positioning on a wet soil underground are also discussed. As a general outcome, we notice that maximum TDE deviations of up to ca. 2–3 h due to RTML deviations have to be expected. The direction of maximum influence of RTML change on TDE generally was on the line caudal to cranial. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s00414-023-03040-y. |
format | Online Article Text |
id | pubmed-10567880 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-105678802023-10-13 Sensitivity of temperature-based time since death estimation on measurement location Subramaniam, J. Shanmugam Hubig, M. Muggenthaler, H. Schenkl, S. Ullrich, J. Pourtier, G. Weiser, M. Mall, G. Int J Legal Med Original Article Rectal temperature measurement (RTM) from crime scenes is an important parameter for temperature-based time of death estimation (TDE). Various influential variables exist in TDE methods like the uncertainty in thermal and environmental parameters. Although RTM depends in particular on the location of measurement position, this relationship has never been investigated separately. The presented study fills this gap using Finite Element (FE) simulations of body cooling. A manually meshed coarse human FE model and an FE geometry model developed from the CT scan of a male corpse are used for TDE sensitivity analysis. The coarse model is considered with and without a support structure of moist soil. As there is no clear definition of ideal rectal temperature measurement location for TDE, possible variations in RTM location (RTML) are considered based on anatomy and forensic practice. The maximum variation of TDE caused by RTML changes is investigated via FE simulation. Moreover, the influence of ambient temperature, of FE model change and of the models positioning on a wet soil underground are also discussed. As a general outcome, we notice that maximum TDE deviations of up to ca. 2–3 h due to RTML deviations have to be expected. The direction of maximum influence of RTML change on TDE generally was on the line caudal to cranial. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s00414-023-03040-y. Springer Berlin Heidelberg 2023-06-19 2023 /pmc/articles/PMC10567880/ /pubmed/37336822 http://dx.doi.org/10.1007/s00414-023-03040-y Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Original Article Subramaniam, J. Shanmugam Hubig, M. Muggenthaler, H. Schenkl, S. Ullrich, J. Pourtier, G. Weiser, M. Mall, G. Sensitivity of temperature-based time since death estimation on measurement location |
title | Sensitivity of temperature-based time since death estimation on measurement location |
title_full | Sensitivity of temperature-based time since death estimation on measurement location |
title_fullStr | Sensitivity of temperature-based time since death estimation on measurement location |
title_full_unstemmed | Sensitivity of temperature-based time since death estimation on measurement location |
title_short | Sensitivity of temperature-based time since death estimation on measurement location |
title_sort | sensitivity of temperature-based time since death estimation on measurement location |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10567880/ https://www.ncbi.nlm.nih.gov/pubmed/37336822 http://dx.doi.org/10.1007/s00414-023-03040-y |
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