Presentation on theme: "Chapter 5 Death from Burns, Cold and Electrical Injuries"— Presentation transcript:
1Chapter 5 Death from Burns, Cold and Electrical Injuries
2Section 1 Death from Burns 1. Definition:Burns is injury produced by the application of flame, or heated solid substances to the surface of the body.Death from burn.Scalding is injury produced by the application hot liquids or gases to the surface of the body.Death from scalding.
32. Appearances of death from burns (1) External appearances:Burns: 4 gradeGrade I: erythemaGrade II: vesicleGrade III: necrosisGrade IV: carbidepungilistic attitude，Cilia sign
9(2). Internal appearances 1. Thermal respiratory tract syndrome: soot, edema and bronchitis ,etc.2. Epicardial or endocardial petechial hemorrhage, blood in color of cherry red, Hb-CO 50%-70%.3. Soot in stomach.4. Extradural heat hematoma5. Degeneration of viscera.
143. Mechanism of death from burn (1) shock: traumatic shock(2) Poising of CO and other gases(3) self-poising.(4) Complications and secondary infections(5) Injury accompanied.4. Forensic expertise(1) Differenciation between death from burn and remains of cremated body
15(2) Identification of suicide, homicide or accident. death from burncremated bodyerythema, vesiclenocilia signboot in tracheathermal respiratory tract syndromeshock lungHbCO in heart and vesselsincreased activation in enzymewithout other cause of deathother cause of death(2) Identification of suicide, homicide or accident.(3) Personal identification.
16(2) Identification of suicide, homicide or accident. (3) Personal identification.
17Section 2 Death from Cold 1. Definition:Frostbite is a kind of injury in skin caused in low temperature.Death from cold.2. Appearances of death from cold(1) paradoxical undressing, risus sardonicus, sardonic feature.(2) Visniffski’s spot.
22Section 3. Electrical injury 1. DefinitionElectrical injury is a kind of injury of skin or other tissue and organ cause by electrical current.Death from electricity.2. The factor of electrical injury(1) Kind of electrical current: DC, AC.(2) Voltage.(3) Intensity of current
233. Mechanism of death (4) electric resistance (5) affecting time (6) route of current pass through the body(7) contact(8) status of body3. Mechanism of death(1) ventricular fibrillation(2) Respiratory paralysis(3) Electrical burn, secondary shock, fat embolism.(4) Fall from height.
244. Appearances of electrical injury or death from electricity (1) electric mark (current mark):Electric edema, streaming of nuclei, cooking effect.(2) electric metalization of skin(3) electric burn(4) exit of current(5) osseous pearls