Blunt trauma - Blunt Trauma Vic V. Vernenkar, D.O. St....

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Blunt Trauma Vic V. Vernenkar, D.O. St. Barnabas Hospital Dept. of Surgery
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Introduction to Blunt Trauma Kinetics of Blunt Trauma Types of Trauma Blunt Trauma Explosion Other Blunt Trauma Examination, Diagnosis Sections
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Most common cause of trauma death and disability Energy exchange between an object and the human body, without intrusion through the skin Introduction to Blunt Trauma
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Kinematics Process of examining the scene to determine potential injuries that result from the forces of motion Windshield, steering wheel, dashboard Was the patient flying thru the air? Roll-over? Engine block on lap? (intrusion)
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MOI Mechanism of injury description of the mechanical and physiological changes that result in anatomical or functional damage of tissue Translation : What hit the patient???, what did the patient hit???!
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Index of Suspicion Based on the MOI and kinetics Predict expected injuries Experience counts here! Be obsessive and compulsive, its OK!!
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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.” (Newton) Conservation of Energy “Energy can neither be created nor destroyed. It is only changed from one form to another.” (Newton)
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Force (Newton’s 2 nd law of motion) Emphasizes the importance of rate at which an object changes speed ( acceleration or deceleration ) Kinetics of Blunt Trauma on Accelerati Mass Force × =
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SOOOO The Force that puts an object in motion must be absorbed before the object will stop. Guess what absorbs that force???? This absorption is what causes tissue injury in the body.
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Kinetic Energy Energy in Motion Double Weight = Double Energy Double Speed = Quadruple Energy SPEED IS THE GREATEST DETERMINANT Kinetics of Blunt Trauma 2 ) ( ) ( 2 speed Velocity weight Mass KE × =
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Physics (UGH!) Three types of forces in blunt trauma Compression Shear Overpressure
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Compression Like laying an organ on a table and hitting it with a hammer, every time you hit it, cells are getting compressed and crushed. Enough said…. .
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Shear Occur when the organ and the organ’s attachment do not accelerate or decelerate at the same rate of speed, or two parts of an organ accelerate or decelerate at different rates . Examples are arch of aorta, spleen, kidney.
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Like hitting a closed paper bag with the open hand….the bag pops . Examples are like steering column hitting
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This note was uploaded on 12/27/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

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Blunt trauma - Blunt Trauma Vic V. Vernenkar, D.O. St....

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