Determination of duration of fresh water exposure on corpse’s skin by dispersion value of its electrical conductivity

Vavilov A.Yu.

Izhevsk State Medical Academy

ORCID: 0000-0002-9472-7264

Rykunov I.A.

Izhevsk State Medical Academy;
Bureau of Forensic Medical Expertise

ORCID: 0000-0002-5522-0292

Determination of duration of fresh water exposure on corpse’s skin by dispersion value of its electrical conductivity

Authors:

Vavilov A.Yu., Rykunov I.A.

More about the authors

Journal: Forensic Medical Expertise. 2024;67(5): 24‑28

DOI: 10.17116/sudmed20246705124

Downloaded: 0

Contact the author

Table of contents

To cite this article:

Vavilov AYu, Rykunov IA. Determination of duration of fresh water exposure on corpse’s skin by dispersion value of its electrical conductivity. Forensic Medical Expertise. 2024;67(5):24‑28. (In Russ.)
https://doi.org/10.17116/sudmed20246705124

Close metadata

OBJECTIVE

Objectification of experts’ conclusions about the duration of corpse’s stay in the water on indicators of dispersion of electrical conductivity of its skin.

MATERIAL AND METHODS

Research aimed at objectifying the conclusions of experts about the duration of corpse’s stay in the water on the indicators of dispersion of electrical conductivity of its skin was conducted using the experimental material from the corpses of 68 persons of different sex and age, who died for different reasons.

RESULTS

Three temperature ranges (1—24, 25—30, 31—40 °C) have been identified on the basis of regression analysis and mathematical models, describing the dynamics of electrical conductivity dispersion coefficient change depending on the duration of corpse’s skin contact with the water of specified temperatures, have been created.

CONCLUSION

Formulas for calculating the period of interest for the researcher have been developed and the boundaries of confidence intervals for each temperature range have been determined, taking into account its diagnostic applicability. A computer program has been written to facilitate routine calculations on the proposed method in order to simplify the practical application of the suggested procedure.

Keywords:

impedancemetry

skin

electrical conductivity

duration of freshwater exposure

diagnostic procedure objectification

Authors:

Vavilov A.Yu.

Izhevsk State Medical Academy

ORCID: 0000-0002-9472-7264

Rykunov I.A.

Izhevsk State Medical Academy;
Bureau of Forensic Medical Expertise

ORCID: 0000-0002-5522-0292

Received:

20.06.2023

Accepted:

22.06.2023

List of references:

Finkelbergs D, Guo J, Huang Y, Liu Y, Fang X, Kankan J, Zha L, Cai J, Fu X. Bacterial succession in microbial biofilm as a potential indicator for postmortem submersion interval estimation. Frontiers in Microbiology. 2022;13:951707. https://doi.org/10.3389/fmicb.2022.951707
Byard RW. Putrefaction: an additional complicating factor in the assessment of freshwater drownings in rivers. Journal of forensic sciences. 2018;63(3):899-901. https://doi.org/10.1111/1556-4029.13614
Li X, Zhou YP, He SW, Lin B. Relationship between water temperature and floating time of aquatic cadavers. Fa yi xue za zhi. 2022;38(1):82-85. https://doi.org/10.12116/j.issn.1004-5619.2021.411019
Pigolkin YuI. Forensic medicine: national guidelines. M.: GEOTAR-Media; 2018. (In Russ.).
Vavilov AYu, Khalikov AA, Rykunov IA, Kuznetsov KO, Sagidullin RH. Determination of the corpse’s stay in the water duration according to maceration degree of the skin. Sudebno-Meditsinskaya Ekspertisa. 2023;66(3):64-68. (In Russ.). https://doi.org/10.17116/sudmed20236603164
Selimhanov ShA, Yusufov RM. Pat. 946498 Union of Sovet Socialist Repablics. The method of determining the prescription of the corpse in water; the applicant and patent holder ShA Selimhanov, RM Yusufov. №2813821/28-13; application №27/06/1979; publ. 30/07/1982, Bul. №28:2. (In Russ.).
Lazareva NA, Volosevich IA. The forensic significance of hair changes in solving the issue of the duration of the body’s stay in water. Medicine of Tomorrow. Materials of the XIX interregional scientific and practical conference of students and young scientists. 2020;299-300. (In Russ.).
Emelyanov AS. Diagnosis of the prescription of death by the magnitude of the electrical resistance of peripheral nerves: specialty 14.03.05 — «Forensic medicine»: Dis. ... kand. med. nauk. Izhevsk. 2021. (In Russ.).
Lakhno AV, Vavilov AY. On photocolorimetric registration of the rate of recovery of cadaveric spots after dosed pressure. Sovremennyye problemy nauki i obrazovaniya. 2018;2:5. (In Russ.).
Khalikov AA, Amineva GM, Kuznetsov KO, Iskuzhina LR, Khalikova LV. Personality factors’ influence (gender, age, death category) on indicators of biophysical objectification of intra-vital injuries of a putrefactive corpse. Sudebno-meditsinskaya ekspertiza. 2021;64(4):25-29. (In Russ.). https://doi.org/10.17116/sudmed20216404125
Nosov MM, Kildyushov EM, Tumanov EV, Dvornikov AS. Study of certain electrophysical properties of adipose tissue in the postmortem period when working with a direct current source. Forensic Medical Expertise. 2021;64(3):29-33. (In Russ.). https://doi.org/10.17116/sudmed20216403129
Vavilov AYu, Rykunov IA, Reshetov AV. On the impedance measurement of changes in the electrical conductivity of the skin of a corpse in fresh water. Modern problems of science and education. 2023;2:1-10. (In Russ.). https://doi.org/10.17513/spno.32465
Pomerantsev AL. Methods of nonlinear regression analysis for modeling the kinetics of chemical and physical processes: specialty 01.04.17 «Chemical physics, burning and explosion, physics of extreme states of matter»: Dis. ... d-ra. fiz.-mat. nauk. M. 2003. (In Russ.).
Kulikov AV, Konovalov EA, Vavilov AYu. Estimation of the measurement error of the prescription of death by a microprocessor device with a thermoresistive sensor. Problems of expertise in medicine. 2006;1:7-9. (In Russ.).

Close metadata