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Blunt Trauma Introduction to Blunt Trauma Kinetics of Blunt Trauma Types of Trauma Blunt Trauma Explosion Other Blunt Trauma Introduction toBlunt Trauma Most common cause of trauma death and disability Energy exchange between an object and the human body, without intrusion through the skin Kinematics Process of examining the scene to determine potential injuries that result from the forces of motion MOI Mechanism of injury description of the mechanical and physiological changes that result in anatomical or functional damage of tissue Index of Suspicion Based on the MOI and kinetics predict expected injuries Kinetics of Blunt Trauma Inertia “A body in motion will remain in motion unless acted upon by an outside force.” “A body at rest will remain at rest unless acted upon by an outside force.” Conservation of Energy “Energy can neither be created nor destroyed. It is only changed from one form to another.” Kinetic versus Potential Energy Kinetics of Blunt Trauma Kinetic Energy Energy in Motion Double Weight = Double Energy Double Speed = Quadruple Energy SPEED IS THE GREATESTDETERMINANT Kinetics of Blunt Trauma Force Emphasizes the importance of rate at which an object changes speed (acceleration or deceleration) Types of Trauma Blunt Closed injury Indirect injury to underlying structures Transmission of energy into the body Tearing of muscle, vessels and bone Rupture of solid organs Organ injury Ligamentum teres Penetrating Open injury Direct injury to underlying structures Blunt Trauma: Automobile Crashes 44,000 people die each year on US highways Events of Impact Vehicle Collision Body Collision Organ Collision Secondary Collisions Objects inside vehicle strike occupant Additional Injuries Vehicle receives a second impact Inertia and MVC’s Blunt Trauma: Automobile Crashes Restraints Seatbelts Occupant slows with the vehicle Shoulder and Lap belts MUST be worn together Injuries if worn separately Airbags (SRS) Reduce blunt chest trauma Cause: Ha