尸斑（Lividity）.docVIP

尸斑（Lividity） One of。 After death, the skin in the lower body parts appear purple red patches, called lividity. An average of 2-4 hours after death. Shiban formation, is due to the death of blood circulation, cardiovascular and blood in the lack of power along the vascular net weight accumulation in the lower body parts, body, body empty high vascular low lower vascular congestion results in lower body parts of the capillaries and small veins filled with blood, through the skin appears dark red to dark purple red spots, the spots began is cloudy, blocky, and gradually formed sheet, namely lividity. Distribution position It is directly related to the posture of the corpse. As his supine body, a rear view in Shiban occipitalia, top, back, waist, buttocks and legs on both sides, sometimes occurring in the body side, even above the sloping area such as upper clavicle. The prone body front, Shiban distribution in the face, chest, abdomen and limbs, this time on both sides of conjunctiva, often with a bleeding. In a standing position of the body, such as the suspension of the bodies, distal Shiban appear in the lower extremities, lower abdomen and upper abdomen, with purple red or dark purple; due to gas or cyanide poisoning death, Shiban was cherry red. If finger compression can be generally within ten hours, remove the oppression and restoration; such as the body of the original Shiban flip, gradually disappear or transfer, and re emerged in the low part of the new. Therefore, the forensic examination bodies, often under Shiban to determine the distribution of bodies parking location. Shiban is one of the postmortem phenomenon appeared, usually appear in death after 2 ~ 4 hours, after 12 ~ 14 hours to the height of 24 ~ 36 hours fixed no longer transfer, until the body of corruption. Formation period Its formation and development are divided into the following three periods: Accretion stage After death, the blood falls to the lower part of the vessel. At this point the b