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Chapter 5 Death from Burns, Cold and Electrical Injuries.

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Presentation on theme: "Chapter 5 Death from Burns, Cold and Electrical Injuries."— Presentation transcript:

1 Chapter 5 Death from Burns, Cold and Electrical Injuries

2 Section 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. Section 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.

3 2. Appearances of death from burns (1) External appearances: Burns: 4 grade Grade I: Grade I: erythema Grade II: Grade II: vesicle Grade III: necrosis Grade IV: carbide pungilistic attitude Cilia sign 2. Appearances of death from burns (1) External appearances: Burns: 4 grade Grade I: Grade I: erythema Grade II: Grade II: vesicle Grade III: necrosis Grade IV: carbide pungilistic attitude Cilia sign

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6 pungilistic attitude

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9 (2). Internalappearances (2). Internal appearances 1. Thermal respiratory tract syndrome: soot, edema and bronchitis,etc. 2. Epicardial or endocardialpetechial hemorrhage, blood in color of cherry red, Hb-CO 50%-70%. 2. Epicardial or endocardial petechial hemorrhage, blood in color of cherry red, Hb-CO 50%-70%. 3. Soot in stomach. 4. Extradural heat hematoma 5. Degeneration of viscera. (2). Internalappearances (2). Internal appearances 1. Thermal respiratory tract syndrome: soot, edema and bronchitis,etc. 2. Epicardial or endocardialpetechial hemorrhage, blood in color of cherry red, Hb-CO 50%-70%. 2. Epicardial or endocardial petechial hemorrhage, blood in color of cherry red, Hb-CO 50%-70%. 3. Soot in stomach. 4. Extradural heat hematoma 5. Degeneration of viscera.

10 Extradural heat hematoma

11 Soot in the airway

12 erythema and vesicle

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14 3. 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 (1) Differenciation between death from burn and remains of cremated body 3. 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 (1) Differenciation between death from burn and remains of cremated body

15 death from burn cremated body, erythema, vesicleno cilia signno boot in tracheano thermal respiratory tract syndrome no shock lungno HbCO in heart and vesselsno increased activation in enzymeno without 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.

17 Section 2 Death from Cold 1. Definition: Frostbite is a kind of injury in skin caused in low temperature. 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. (1) paradoxical undressing, risus sardonicus, sardonic feature. (2) Visniffskis spot. (2) Visniffskis spot. Section 2 Death from Cold 1. Definition: Frostbite is a kind of injury in skin caused in low temperature. 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. (1) paradoxical undressing, risus sardonicus, sardonic feature. (2) Visniffskis spot. (2) Visniffskis spot.

18 Frostbite Frostbite

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20 paradoxical undressing

21 risus sardonicus, sardonic feature

22 Section 3. Electrical injury 1. Definition Electrical 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 Section 3. Electrical injury 1. Definition Electrical 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

23 (4) electric resistance (5) affecting time (6) route of current pass through the body (7) contact (8) status of body 3. Mechanism of death (1) ventricular fibrillation (2) Respiratory paralysis (3) Electrical burn, secondary shock, fat embolism. (4) Fall from height. (4) electric resistance (5) affecting time (6) route of current pass through the body (7) contact (8) status of body 3. Mechanism of death (1) ventricular fibrillation (2) Respiratory paralysis (3) Electrical burn, secondary shock, fat embolism. (4) Fall from height.

24 4. 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 4. 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

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26 Histology of current mark

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32 Scene of death from suicidal electrocution

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36 Current mark Cooking effect

37 Lightening mark

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