Mechanica 和oy Xue Aimin, Ph.D, MD Department of Forensic Medicine School of basic Medical sciences Fudan University
Xue Aimin， Ph.D.，M.D. Department of Forensic Medicine School of Basic Medical Sciences Fudan University
Part l General Introduction victim doctor
Part I General Introduction • Injury • victim • doctor
To Doctor: Be carefu
To Doctor： Be careful
1 Definition Mechanical injury is defined as the structural destruction or the functional impairment of any part of the human body caused by mechanical force external injury internal injury
1. Definition • Mechanical injury is defined as the structural destruction or the functional impairment of any part of the human body caused by mechanical force. • external injury • internal injury
2. Mechanism of mechanical injur The intensity of force mass surface velocity Ek=1/2mv2 time F=m(v-vo)/(t-to biological feature of the target tissue
2. Mechanism of mechanical injury The intensity of force • mass • surface • velocity Ek=1/2mv2 • time F=m(v-v0 )/(t-t0 ) • biological feature of the target tissue
3. Classifiction of mechanical injury Weapon Sharp instrument injury Blunt instrument injury Firearm inJury Manner Homicide Suicide · Accident
Weapon • Sharp instrument injury • Blunt instrument injury • Firearm injury Manner • Homicide • Suicide • Accident 3. Classifiction of mechanical injury
Morphological features Abrasion Contusion Wound Fracture ° Rupture of viscera Fragmentation of whole body
Morphological features: • Abrasion • Contusion • Wound • Fracture • Rupture of Viscera • Fragmentation of whole body
Functional disturbance Neurogenic shock Concussion inJury Trigger region: scrotum, precordium carotid sinus, uterine cervix, anus
Functional disturbance • Neurogenic shock • Concussion injury • Trigger region: scrotum, precordium, carotid sinus, uterine cervix, anus
Part Basic Types of Mechanical Injury
Part II Basic Types of Mechanical Injury
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