Blunt Force Trauma.

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Presentation transcript:

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 Outbending around the site of force LeFort fractures Ring fractures

Estimation of direction Estimation of energy Estimation of number 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

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)

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

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

Miscellaneous Strangulation Fire Chemical Trauma hanging, ligature, manual strangulation Fire Chemical Trauma