Time since death nomographs implementing the nomogram, body weight adjusted correction factors, metric and imperial measurements

Potente, Stefan; Kettner, Mattias; Ishikawa, Takaki

doi:10.1007/s00414-018-1928-z

Cited by 13 publications

(9 citation statements)

References 23 publications

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“…This is because external examinations depend on several confounding aspects as mentioned above. All these items are combined in a nomogram in daily forensic routine and enable the time since death to be estimated with a certain standard deviation . Additional investigations of the external examination can subsequently refine the determined interval, as so‐called “compound methods” .…”

Section: Discussionmentioning

confidence: 99%

Entomological and Cardiologic Evidence of Time Since Death in Short Postmortem Intervals

Ondruschka

Babian

Neef³

et al. 2019

Journal of Forensic Sciences

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Estimating the time since death of the deceased is a main goal in forensic investigations, but this can be challenging due to contradictory results derived from different investigations at the scene of death. We present a case of a 78‐year‐old woman, found dead in a small forest with broad‐leaved trees, whose husband had a history of domestic violence. Routinely performed investigations, such as postmortem rectal temperature and lividity, yielded inconsistent time since death results between only a few and longer than 20 h. This difficulty was most likely caused by high ambient temperatures of up to 38.0°C, which negatively influenced the informative value of the applied nomogram method. Additionally, performed entomological investigation of fly maggots (Lucilia illustris) recovered from the corpse and the assessment of heart pacemaker data revealed consistent and incontrovertible results. The presented case highlights the benefits of information provided by entomological investigations and data evaluation of cardiac implantable electronic devices and the combined use of the two techniques.

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Section: Discussionmentioning

confidence: 99%

Entomological and Cardiologic Evidence of Time Since Death in Short Postmortem Intervals

Ondruschka

Babian

Neef³

et al. 2019

Journal of Forensic Sciences

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“…Thus, the number of nomography-based articles published in recent years has been quite scarce ( Glasser and Doerfler, 2019 ; Toumès, 2012 ; Doerfler, 2008 , 2009a ). Among the most recent and relevant works in applied nomography are those focused on medicine ( Chen et al., 2021 ; Potente et al., 2019 ; Iasonos et al., 2016 ; Marasco et al., 2011 ; Kattan and Marasco, 2010 ; Bevilacqua et al., 2007 ; Kattan et al., 1999 ), geothermal applications ( Ekneligoda, 2015 ), forensics ( Drábek, 2014 ; Henssge and Madea, 2004 ; Henssge, 1992 ), seismic hazards studies ( Douglas, 2018 , 2021 ; Douglas and Azarbakht, 2021 ; Douglas and Danciu, 2020 ; Gkimprixis et al., 2019 ; Mahdyiar, 1987), engineering and mathematical education ( Uzoigwe et al., 2017 ; Glasser and Doerfler, 2019 ). Moreover, the study of the practical application of nomography has been dismissed from most sciences and engineering universities syllabus.…”

Section: Introductionmentioning

confidence: 99%

Nomography: A renewed pedagogical tool to sciences and engineering high-education studies

Martínez‐Pagán

Roschier²

2022

Heliyon

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“…Во-вторых, величина корректирующего фактора в модели Henssge зависит не только от условий охлаждения, но и от массы тела [6]. Однако существующие программные реализации номографического метода при определении итоговых значений корректирующего фактора используют не точные аналитические решения названной функциональной зависимости, а приближённые табулированные данные, или же не учитывают данный аспект вовсе [4,7].…”

Section: Introductionunclassified

“…, (1) где f -итоговое, а f 70 -табулированное значение корректирующего фактора для массы трупа, равной 70 кг, и заданных условий охлаждения; М -масса тела, кг [6,7].…”

Section: Introductionunclassified

New computer technologies to determine postmortem interval by the Henssge method

Nedugov

Владимирович²

2021

Russian Journal of Forensic Medicine

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Abstract. The Henssge method is still the main thermometric method for determining postmortem interval. However, its existing software implementations are characterized by a number of disadvantages associated with copying simplified nomographic variants of the original mathematical models without any attempts to optimize them, as well as the imperfection of the procedure for finding the roots of implicit functions. In this paper, we propose methods for optimizing solutions to Henssge mathematical models and determining their errors, as well as software applications that implement them. Aim. Optimization of the Henssge algorithm and development of a series of applications based on the obtained data, designed to determine postmortem interval. Material and methods. Methods for solving double exponential Henssge models and determining their errors based on computational mathematics and regression modeling by the least squares method with subsequent implementation in the format of a computer programs in C#are optimized. Results. The discrete nature of changes in the residual variances of the double exponential Henssge models intended for determining the postmortem interval according to rectal and cranioencephalic thermometry data under conditions of constant external temperature is eliminated. It is possible to determine the interval estimates of postmortem interval at any confidence probability. The application program Warm Bodies HR has been developed, which implements the applied optimization methods. The application program Warm Bodies AHBG, designed to determine postmortem interval by the Henssge method in the conditions of a single discrete decrease or increase in the constant temperature of the external environment, including with a change in the cooling conditions of the corpse, has been developed. The search for the roots of implicit functions in programs is carried out using the Newton tangent method, which ensures the continuous nature of the source data and eliminates errors associated with the need to round directly measured physical quantities. Conclusions. The developed programs are recommended to be used in forensic medical expert practice to determine postmortem interval.

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Time since death nomographs implementing the nomogram, body weight adjusted correction factors, metric and imperial measurements

Cited by 13 publications

References 23 publications

Entomological and Cardiologic Evidence of Time Since Death in Short Postmortem Intervals

Entomological and Cardiologic Evidence of Time Since Death in Short Postmortem Intervals

Nomography: A renewed pedagogical tool to sciences and engineering high-education studies

New computer technologies to determine postmortem interval by the Henssge method

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