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Blunt Force Trauma

Blunt Force Trauma . Characteristics of Instruments. Size length and width Shape cross-sectional outline round -- more fx lines angular -- fewer fx lines, distinct edges patterned injuries Weight heavy or light. Effects of BFT on bone. Inbending at the site of force

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Blunt Force Trauma

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  1. Blunt Force Trauma

  2. Characteristics of Instruments • Size • length and width • Shape • cross-sectional outline • round -- more fx lines • angular -- fewer fx lines, distinct edges • patterned injuries • Weight • heavy or light

  3. Effects of BFT on bone • Inbending at the site of force • Outbending around the site of force • LeFort fractures • Ring fractures

  4. Same as projectiles • Description of wound • Estimation of size • Estimation of shape • cross-sectional outline and axial configuraton • Estimation of direction • Estimation of energy • Estimation of number • Estimation of sequence

  5. Sharp and Miscellaneous Trauma • Sharp is the result of a narrowly focused, dynamic compression force • Results in discontinuity, such as a puncture, incision or cleft • Additional discontinuities include fx lines, hinge fx, and chips of bone (wastage)

  6. Effects of Sharp Instruments • Puncture • force is vertical or near vertical, focus is cone-shaped • Incision • defect is longer than wide, force applied across the surface of a bone with a long, sharp edge • Cleft or Notch • hacking • Striations • on the walls, caused by dull or serrated blades

  7. Wound Analysis • Description of wound • Instrument characteristics • type • cutting, stabbing, chopping • size • blade length, width, surface contour, sharpness • Direction of force • Number of traumatic events

  8. Miscellaneous • Strangulation • hanging, ligature, manual strangulation • Fire • Chemical Trauma

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