RU2525534C1 - Method of determining prescription of injuries on corpse - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: coefficient of heat conductivity of soft tissues of an injured area, concentration of alcohol in the corpse blood, calculation. Calculation of prescription of injuries is carried out by formulae, different for the cases when alcohol in the corpse blood is present or absent.

EFFECT: method makes it possible to increase accuracy of determining prescription of injuries on the corpse, including the injuries located on the oral cavity mucosa.

2 ex

Description

The invention relates to medicine, namely to forensic medicine, and can be used to determine the duration of damage to a corpse.

A known method of determining the prescription of damage (bruising) on living faces (No. 2405431, RU, IPC A61B 5/117). The essence of the method consists in measuring the maximum temperature in the area of the bruise and the minimum temperature of the undamaged part of the body, additional accounting for the area of the bruise and the passport age of the person under investigation. The calculation of the age of the bruising is made according to the corresponding formula.

The disadvantage of this method is the impossibility of its application to determine the limitation of damage to a corpse.

There is a method of determining the prescription of injuries (bruising) on corpses (Halikov A.A., Vavilov A.Yu. Diagnosis of the prescription of mechanical injury in forensic medicine using biophysical methods. - Izhevsk: Expertise, 2007. - P.120), taken as a prototype. The essence of the method is to measure the differential thermal conductivity, capacitance of the damage site and the control region, taking into account the ethanol concentration and the age of the deceased person. The calculation of the age of the bruising is made according to the corresponding formula.

The disadvantage of this method is its limited use (the impossibility of applying to determine the age of injuries located on the mucous membrane of the corpse's mouth), as well as the high complexity due to the need to use several instrumental research methods (measuring thermal conductivity and measuring capacitive resistance of biological tissues).

The objective of the claimed invention is to simplify the method for determining the prescription of injuries on a corpse with the expansion of its functionality (diagnosis of prescription of hemorrhage on the oral mucosa).

The solution of the claimed invention is achieved by the fact that according to the method for determining the prescription of injuries on a corpse, including determining the coefficient of thermal conductivity of the soft tissues of the lesion area, the concentration of alcohol in the blood of the corpse, calculating the prescription, if there is alcohol in the blood of the corpse, the prescription of damage is calculated by the formula:

D _fit = -402.359 × λ _fit + 2.85997 × C _x +254.711,

where D _damage - the duration of the damage, hour;

λ _pov - the coefficient of thermal conductivity of soft tissues of the lesion area, W / (m × K);

C _x is the concentration of alcohol in the blood of a corpse, ‰, and in the absence of alcohol in the blood of a corpse, the duration of damage is calculated by the formula:

, $$D_{P\mathrm{about}\mathrm{at}R}=\frac{12952.4\times {\lambda }_{P\mathrm{about}\mathrm{at}R}^3-21878.6\times {\lambda }_{P\mathrm{about}\mathrm{at}R}^2+12065.6\times {\lambda }_{P\mathrm{about}\mathrm{at}R}-2157.55}{{\lambda }_{P\mathrm{about}\mathrm{at}R}^2+\mathrm{0,120555}}$$

,

where D _damage - the duration of the damage, hour;

λ _pov - the coefficient of thermal conductivity of the soft tissues of the lesion area, W / (m × K).

The claimed method allows with high accuracy to determine the duration of hemorrhages on the mucous membrane of the mouth of a corpse by the method of determining the coefficient of thermal conductivity of biological tissues. High accuracy of the method is achieved through the use of mathematical expressions that are different for cases of presence or absence of alcohol in the blood of a corpse.

The method is as follows. Using surgical instruments, a flap of soft tissues of the corpse with damage is released. Using a meter of thermal conductivity, the value of the coefficient of thermal conductivity of the selected flap of soft tissues is measured. The standard methods adopted in forensic research determine the presence of alcohol in the blood of a corpse and (if any) its concentration.

In the presence of alcohol in the blood of a corpse, the duration of damage is calculated by the formula:

D _fit = -402.359 × λ _fit + 2.85997 × C _x +254.711,

where D _damage - the duration of the damage, hour;

λ _pov - the coefficient of thermal conductivity of soft tissues of the lesion area, W / (m × K);

C _x is the concentration of alcohol in the blood of a corpse, ‰, and in the absence of alcohol in the blood of a corpse, the duration of damage is calculated by the formula:

, $$D_{P\mathrm{about}\mathrm{at}R}=\frac{12952.4\times {\lambda }_{P\mathrm{about}\mathrm{at}R}^3-21878.6\times {\lambda }_{P\mathrm{about}\mathrm{at}R}^2+12065.6\times {\lambda }_{P\mathrm{about}\mathrm{at}R}-2157.55}{{\lambda }_{P\mathrm{about}\mathrm{at}R}^2+\mathrm{0,120555}}$$

,

where D _damage - the damage time, hour.

λ _pov - the coefficient of thermal conductivity of the soft tissues of the lesion area, W / (m × K).

Example 1: The body of Mr. A., 58 years old, was sent by the police to the Bureau of Forensic Medical Examination for a forensic medical study. When examining a corpse, it was established that he had injuries (hemorrhages) of the oral mucosa caused to Mr. A. by third parties during the course of their unlawful acts.

The coefficient of thermal conductivity of soft tissues of the hemorrhage of the oral mucosa of the investigated corpse was _determined, λ = 0.539 W / (m × K), and a forensic chemical study of its blood for the presence of alcohol in it was carried out. No alcohol was found in the blood of Mr. A.’s corpse. Calculation of the limitation of hemorrhages of the oral mucosa of the examined corpse (D _damage ):

$$\begin{array}{l}{D}_{P\mathrm{about}\mathrm{at}R}=\frac{12952.4\times {\lambda }_{P\mathrm{about}\mathrm{at}R}^3-21878.6\times {\lambda }_{P\mathrm{about}\mathrm{at}R}^2+12065.6\times {\lambda }_{P\mathrm{about}\mathrm{at}R}-2157.55}{{\lambda }_{P\mathrm{about}\mathrm{at}R}^2+\mathrm{0,120555}}=\\ =\frac{12952.4\times {0.539}^3-21878.6\times {0.539}^2+12065.6\times 0.539-2157.55}{{0.539}^2+\mathrm{0,120555}}=\mathrm{43,4}h\mathrm{but}\mathrm{from}\end{array}$$

Thus, the duration of damage (hemorrhage) of the mucous membrane of the mouth of the corpse of Mr. A. is 43.4 hours. The result obtained was consistent with the data of the investigating authorities regarding the time of causing damage to Mr. A. by third parties.

Example 2: The body of Mr. B., 39 years old, was sent by the police to the Bureau of Forensic Medical Examination to conduct a forensic medical study. When examining a corpse, it was established that he had injuries (hemorrhages) of the oral mucosa caused to Mr. B. by third parties during the course of their unlawful acts.

The coefficient of thermal conductivity of the soft tissues of the hemorrhages of the oral mucosa of the investigated corpse was _determined, λ = 0.53 / W / (m × K), and a forensic chemical study of its blood for the presence of alcohol in it was carried out. Alcohol in a concentration of 1.27 ‰ was detected in the blood of the corpse of Mr. B. Calculation of the limitation of hemorrhages of the oral mucosa of the examined corpse (D _damage ):

D _fit = -402.359 × λ _fit + 2.85997 × C _x + 254.711 =

= -402.359 × 0.531 + 2.85997 × 1.27 + 254.711 = 44.7 hours. Thus, the duration of injuries (hemorrhages) of the mucous membrane of the mouth of the corpse of Mr. B. is 44.7 hours. The result obtained was consistent with the data of the investigating authorities regarding the time of causing damage to Mr. B. by third parties.

Claims (1)

A method for determining the prescription of injuries on a corpse, including determining the coefficient of thermal conductivity of soft tissues of the lesion area, the concentration of alcohol in the blood of the corpse, calculating the prescription, characterized in that in the presence of alcohol in the blood of the corpse, the prescription of damage is calculated by the formula:
D _turnp = -402.359 × λ _turnp + 2.85997 × C _x +254.711,
where D _pov - damage duration, hour;
D _povr - coefficient of thermal conductivity of soft tissues of the lesion area, W / (m × K);
C _x - the concentration of alcohol in the blood of a corpse, ‰,
and in the absence of alcohol in the blood of a corpse, the duration of damage is calculated by the formula:
$$D_{P\mathrm{about}\mathrm{at}R}=\frac{12952.4\times {\lambda }_{P\mathrm{about}\mathrm{at}R}^3-21878.6\times {\lambda }_{P\mathrm{about}\mathrm{at}R}^2+12065.6\times {\lambda }_{P\mathrm{about}\mathrm{at}R}-2157.55}{{\lambda }_{P\mathrm{about}\mathrm{at}R}^2+\mathrm{0,120555}}$$

,
where D _pov - damage duration, hour;
λ _pov - the coefficient of thermal conductivity of the soft tissues of the lesion area, W / (m × K).