复旦大学：《法医学 Forensic Medicine》教学资源_Mechanical Injury -1 General Introduction

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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