Pages: 1 2

General cooling

The course and outcome of a General cooling largely depend on the context in which it occurred. For example, the outcome is particularly the case when cooled in water. Due to the specific cooling in water (it is faster) people often die before the development of deep hypothermia from vascular collapse or cold shock.
High resistance against cold is the reason for the occurrence of pathological processes require considerable duration of action of low temperatures. During this period, the body mobilizes all possible reserves to maintain body temperature at the physiological level (intensive digested food in the stomach, utilized blood sugar, glycogen in the muscles and liver, as well as alcohol, if he was adopted). Long term effects of low ambient temperatures under certain conditions, leads to a gradual reduction of the tissue of the human body temperature. Reduced body temperature leads to inhibition of biochemical processes in cells and tissues, which are reduced depending on the cooling exponentially. In the venous system, you receive the arterial blood and Central nervous system is in a state of anoxia on the background of hyperoxemia.
The body of the higher animals can carry significant local hypothermia, with the temperature at which the common colds inevitably causes death. Under the overall cooling of the severity of the condition of the organism is determined by reducing the temperature of the body: when 30oC have significant disorders of respiration and circulation, there reflex spasm of the blood vessels, blood flow decreases, there stasis and necrosis of tissues. The body temperature of a living person, subjected to cold, as a rule, can not be lower than 26th S. the Initial stage of the General hypothermia reversible if universal circulatory disorder is relatively short and small. It is essential that extreme States during the cold injury and death from it flow without glaciation tissues. Freezes, so only a corpse. Freezing is a means to save the corpse. Damage, pathological changes and other features are stored in the tissues of the frozen corpses and in the study can be determined.
Death usually occurs at temperature reduction is up to 22-24 °N the Immediate cause of death is often the primary stop breathing, sometimes vascular collapse or fibrillace ventricular heart.
When inspecting the corpse to the place of its discovery is usually lying on snow open space) the position of the victim may indicate lifetime action of low temperatures: man, trying to keep warm, flexes his hands in the elbow joints and puts him on the chest, leg bends to the stomach, bending them at the knee joints, pose zasnuvshii person. Observations show that people, before his death, was in a condition of strong alcoholic intoxication, this posture may not be.
Evidence of in vivo action of low temperature on a place of detection of a corpse, in immediate proximity to it, under it are signs of the influence of body heat to the snow which melts with the subsequent formation of ice and even freezing of body parts and clothing; the absence of these signs may indicate the movement of the corpse after death.
With long-term effect of cold on the open areas of the body are marked cyanosis, swelling, i.e., the signs of osnaline. The holes of the mouth and nose find icicles on the eyelashes - frost. Occasionally there is a "goose bumps", resulting from the contraction of the muscles that raise the hair on the skin. The saturation of blood with oxygen at death from hypothermia causes reddish color of the skin and pinkish hue cadaveric spots.
If death from hypothermia occurs in conditions of positive temperature environment, experiencing the fabric of time to dispose of the blood oxygen in the future period and cadaveric spots are purple. When death in conditions of negative temperatures cadaveric spots remain pink.