Pages: 1 2 3

The establishment of limitation of death

Definition of limitation of death. Definition of limitation of death is the expert determination of terms of its occurrence in hours for early postmarketing period (2-3 days), or in days (or even months) - in the presence of later changes corpse.
During the investigation of crimes against human life is very often necessary to forensic medical establishment of the expiry date of death that renders great assistance to the bodies of inquest, investigation and court and is often crucial to identify a specific person who committed the crime.
Studying the problem of limitation of death, taken to resolve forensic issues, has also been important for the health authorities. The prescription of death, defined in the early stages of post-mortem period, is determined primarily on the basis of the changes connected with perejivaet tissues and organs. Get the forensic research on early post-mortem changes with the help of modern laboratory methods can be useful for transplantologists, resuscitators, pathophysiologists, biochemists and representatives of other medical specialties. Noted that in most tissues of the phenomenon of autolysis visible to 12-18 h postmortem period and sharply expressed to 36-48 hours Glycogen in the liver little to 24 hours, by this time, sharply reduced the content of DNA and RNA. Marked a certain dynamics of activity of enzymes depending on the time from the moment of death with a strong downward trend to 48 hours Activity of ATP in muscle tissue disappears to 12 h postmortem period.
Sustainable indicators for early death were obtained from the use of a number of physico-chemical and biophysical methods. We refer to them the method of registration of the change superweak luminescence (chemiluminescence) of various tissues homogenates and the concentration of potassium ions in the blood.
The data obtained indicate certain regularities in the increase in liquid environments of an organism of the contents of individual elements (potassium, phosphorus) and, conversely, some mitigation (sodium), depending on the limitation of death.
When examining bodies at the place of the discovery and study them in the morgue widely used methods of determining the limitation of death, based on the dynamics of formation and development of early and late changes corpse.
Cadaveric spots in the stage of gipoteza appear after 2-4 hours after death, in the period from 2-4 to 12-14 hours a dead spot when pressed on them completely disappear and after a while restored the initial color. In the stage of diffusion, which lasts approximately from 14 to 24 h, cadaveric spots turn pale when pressure and significantly slower restore its colouring and finally, after 24 h cadaveric spots do not change color. This pattern of changes in cadaveric spots and allows you to approximately define the prescription of death. However, this trick is highly subjective.
Orienting data for determining the limitation of death, depending on the time restore the color of a corpse spots are presented in table. 1.

Table 1. Recovery time corpse paint spots depending on their stages and old death
Stage Time restore the color of a corpse spots Time after death, h
Gemostaz


Diffusion



Imbibery
5-10 s
30
1-2 min
5-8 min
8-10 min
15 min
15 min
Do not disappear and fade
2
4
6-8
10-12
14-16
18-20
22-24
24-48

The table shows the average. Color cadaveric spots and the time required to restore their color depends on causes of death. For example, when death from mechanical asphyxia, which is characterized by abundant bluish-purple cadaveric spots, the time required to restore their original colors, less than for death caused a great loss of blood, when the color of a corpse spots recover more slowly. Thus, in some cases, a certain correction in assessing changes cadaveric spots based on their severity and the cause of death.