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Unit_1_Day_6__Mechanics-Tissue_Response_

Unit_1_Day_6__Mechanics-Tissue_Response_ - KIN 320...

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1 Mechanical Principles for Trauma Biomechanics of Injury & the Injury Cycle Biomechanics of Trauma TRAUMA - injury to a living body caused by the loading of an external force that exceeds the tissue’s maximum tolerance Principle of Loading to Injury Acute – Traumatic Acute – Gradual Sub-Acute – Traumatic Sub-Acute – Gradual Chronic Biomechanics of Trauma Acute injury: results from a single or a few tissue overloads Overuse injury: repeated force application Overuse may lead to acute, e.g., Achilles tendonitis weakens the tissue and the player may rupture the tendon. Injury Terminology General Trauma Sprains Subluxations dislocations Strains Fractures Musculo-skeletal disorders Tumors Weaknesses Inflammatory responses KIN 320 - Classsroom Notes Fall 2011
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2 Injury Terminology Levels of Dysfunctions Annoyances Minor M d t Moderate Major Severe Injury Recognition History what, when, where, how, etc., nature and extent of the injury deformities bleeding skin color, temperature, texture etc., pain descriptions & localization capability other factors to be considered incidence and distribution level of competition sport specific age, sex etc Types of Injury Exposed - dangers are bacterial, fungal and viral infections mechanisms are usually associated with a force being distributed of the surface of the body, i.e., friction, shearing, stretch, or impact abrasions lacerations - tears incisions - cuts punctures avulsions - loosens a flap of skin Types of Injury Unexposed - no break in the skin, therefore little danger of infection Mechanism: direct impact, indirect force, stretch torsion shearing overuse stretch, torsion, shearing overuse, impingement, etc contusions strains sprains (dislocation/subluxation ) fractures KIN 320 - Classsroom Notes Fall 2011
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3 Biomechanics of Trauma Types of Injury Primary Injury Macrotrauma Microtrauma Secondary Injury Macrotrauma Microtrauma Types of Injury Microtrauma - forces are generally small, but over a large area normal force and abnormal tissue abnormal force and abnormal tissue abnormal force and normal tissue(overuse) microscopic tearing of tissue secondary mechanical changes due to inflammation cause increase in local pressure and decrease in blood supply Macrotrauma - abnormal very large forces Injury Recognition and Evaluation A R T Asymmetry Range of Motion Texture Signs and Symptoms
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