EmtKinematics - KINEMATICS An Introduction to the Physics...

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KINEMATICS An Introduction to the Physics of Trauma
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Trauma Statistics 100,000 trauma deaths/year One-third are preventable Unnecessary deaths often caused by injuries missed because of low index of suspicion Raise index of suspicion by evaluating scene as well as patient
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Kinematics Physics of Trauma Prediction of injuries based on forces, motion involved in injury event
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Physical Principles Kinetic Energy Newton’s First Law of Motion Law of Conservation of Energy
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Kinetic Energy Energy of motion K.E. = 1/2 mass x velocity 2 Major factor = Velocity “Speed Kills”
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Newton’s First Law of Motion Body in motion stays in motion unless acted on by outside force Body at rest stays at rest unless acted on by outside force
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Law of Conservation of Energy Energy cannot be created or destroyed Only changed from one form to another
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Conclusions When moving body is acted on by an outside force and changes its motion, Kinetic energy must change to some other form of energy. If the moving body is a human and the energy transfer occurs too rapidly, Trauma results.
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Types of Trauma Penetrating Blunt Deceleration Compression
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Motor Vehicle Collisions Five major types Head-on Rear-end Lateral Rotational Roll-over
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Motor Vehicle Collisions In each collision, three impacts occur: Vehicle Occupants Occupant organs
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Head-on Collision Vehicle stops Occupants continue forward Two pathways Down and under Up and over
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EmtKinematics - KINEMATICS An Introduction to the Physics...

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