An experimental evaluation of electrical skin conductivity changes in postmortem interval and its assessment for time of death estimation

Cantürk, İsmail; Karabiber, Fethullah; Çelik, Safa; Şahin, M. Feyzi; Yağmur, Fatih; Kara, Sadık

doi:10.1016/j.compbiomed.2015.12.010

Cited by 12 publications

(8 citation statements)

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“…Among the several vital features of the skin, sensory properties have been characterized successfully over the past few decades experimentally and computationally. 26–30 The sensing properties of the skin are inevitably altered by the association of myriad factors, such as aging, allergic reactions, and direct or indirect diseases like skin cancer, due to particular biological and physicochemical changes at the molecular, cellular, tissue, and organ levels. Skin and muscles, involving the large, flexible, and robust organs, reflect physiological and pathological alterations of the whole organism.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in smart wearable sensors as electronic skin

Mousavi,

Rahimnejad,

Azimzadeh

et al. 2023

J. Mater. Chem. B

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Section: Introductionmentioning

confidence: 99%

Recent advances in smart wearable sensors as electronic skin

Mousavi,

Rahimnejad,

Azimzadeh

et al. 2023

J. Mater. Chem. B

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“…Changes to the skin occur at different times after the death of the body. The general morphology of the skin after death and the changes in histology, biomechanics 1 , temperature, spectral characteristics 2 – 4 , microbes 5 – 9 , skin resistivity 10 , 11 and other factors 12 , 13 have been studied, and some progress has been made, but it has not been enough to be applied to actual situations and to be used to infer the time of death accurately.…”

Section: Introductionmentioning

confidence: 99%

Histological changes in human skin 32 days after death and the potential forensic significance

Wang

Michu

Dong

et al. 2020

Sci Rep

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To observe the histological changes in human skin within 32 days after death to explore its potential significance in forensic practice. The intact full-thickness skin and subcutaneous tissue from the sternum of eight corpses were placed in an environment of 4–6 °C for 4 h, 6 h, 12 h, 18 h, 24 h, 36 h, 48 h, 60 h, 72 h, 84 h, 96 h, 6 d, 8 d, 10 d, 12 d, 16 d, 20 d, 24 d, 28 d, and 32 d. Then, the whole layer of the skin was stained with haematoxylin & eosin. The histological morphology of the epidermis, dermis and appendages (sweat glands, hair follicles, and sebaceous glands) was observed under an light microscope. The epithelial nucleus condensed at 24 h after death, and cell lysis was exhausted after 20 days. The post-mortem changes in the dermis occurred later than that of the epidermis (72 h), but after epidermal changes started, the change was more rapid. At 16 d, the layers had become homogenized. The epidermis and dermis had completely separated 24 d after death. The changes in the sweat glands appeared earlier (24 h) and disappeared later (32 days); the sebaceous glands and hair follicles began to undergo degenerative changes at 96 h after death, and at approximately 20 d, only their contour remained. There were individual and structural differences in the post-mortem histological changes in the skin. At 4–6 °C ambient temperature, some structures of the human skin still exist for a long time after death, and these structures can be used to identify the source of the tissue; post-mortem histological changes in the skin occur at specific times, which can be used to help infer the time of death. A comprehensive observation of changes in the skin composition/structure is required to comprehensively analyse possible death times.

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“…Different physical methods have been utilized to estimate the PMI. Electrical conductivity changes have been proposed in the literature in relation to PMI, stablishing a positive relationship between the time after death and electrical conductivity [8]. Postmortem eye changes might be an important means to determine the PMI, different studies have explored relationship between the elapsed time after death and the opacity development of the corneal and non-corneal regions [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Electrical conductivity changes have been proposed in the literature in relation to PMI, stablishing a positive relationship between the time after death and electrical conductivity [8].…”

Section: Introductionmentioning

confidence: 99%

Death as a Process: Early Postmortem Changes Observed in the Agonal Stage of Terminal Patients

Torrent¹,

Muñoz²,

Torroella³

et al. 2017

Insights Anthropol

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Introduction: Agony can be defined as the preciding stage to death, in those situations where life is gradually extinguished. So that, agony is characterized by the cese of the vital functions. From the moment of death and throughout the decomposition process, a series of observable postmortem changes occur in the corpse. Early postmortem changes are rigor mortis, livor mortis, algor mortis and cornea drying. Aim:The aim of the present observational study is to monitor the clinical signs presented during agony and to determine those that are considered as early postmortem changes.Material and methods: Signs monitoring and data registration were carried out during 4 months at the Intensive Care Unit of Hospital of Blanes (Girona, Spain), 21 patients were daily evaluated during their stay at the hospital until the moment of their death. The inclusión criteria for the individuals enrolled in the study were: i) Being diagnosed of a terminal disease and ii) Being at the end of life period. The evaluated signs were: Pallor and cianosis, body temperature, lividities, rigidity, apnea, oral secretions, anuria, eye dehydratation.Results: General pallor was registered in 14 patients, 5 patients presented cyanosis. 12 patients presented rigidity in the cervical region, 5 patients presented rigidity in upper extremity and 8 individuals presented rigidity in the lower extremity; Lividities in upper extremities could be observed in 5 patients, and 7 patients presented lividities in lower extremities. Eye dryness was observed in 10 patients. All those signs are considered postmortem changes. Conclusion:This article highlights the concept of death as a process. And it should be taken into account either by healthcare professionals dealing with the living, in their late stage of life, and also by forensic scientist dealing with the dead.

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An experimental evaluation of electrical skin conductivity changes in postmortem interval and its assessment for time of death estimation

Cited by 12 publications

References 31 publications

Recent advances in smart wearable sensors as electronic skin

Recent advances in smart wearable sensors as electronic skin

Histological changes in human skin 32 days after death and the potential forensic significance

Death as a Process: Early Postmortem Changes Observed in the Agonal Stage of Terminal Patients

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