Blunt and Penetrating Trauma
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Energy of Motion (1/2Mass x Velocity2)
Slowing down of moving object.
Index of Suspicion
Suspicion of underlying injuries when determining mechanism of injury.
Mechanism of Injury
Force or transference of energy resulting in injury.
Conversion of Energy
Potential Energy becomes Kinetic Energy, which become Work (think of someone jumping off a building - Potential Energy at the top, Kinetic on the way down, becomes Work when they hit the ground).
Blunt Force Trauma
Does not penetrate soft tissue when applied to the body. (Vehicle Collisions, Falls, etc).
Indications: Discoloration, Pain
3 Collisions of a Car Accident
- Car Collision
- Human Collision
- Internal Collision
3 MVA Trauma Indicators
- Passenger Compartment Intrusion
- Seats Torn From Mounts
- Collapsed Steering Wheel
Common MVA Injuries
- Fractures of Lower Extremities
- Head Trauma
- Flail Chest from Ribs Hitting Steering Wheel
Coup-Contrecoup Brain Injury
Injury occurring at both the point of contact and the opposite side of the impact due to transmission of energy through the brain tissue.
- What hit the ground first? (What absorbed the majority of the impact)
- < or > 15-20 ft?
Common Chest Injuries from Trauma
- Broken Ribs
- Cardiac Contusion
- Pulmonary Contusion
Signs of Head Trauma
- Loss of Consciousness
- Altered LOC
- Doesn't Remember the Accident
- Changes in Speech
ICP = Increased Cranial Pressure, resulting from bleeding and swelling of the brain.
Solid Organs (potential for tears/lacerations)
Hollow Organs (potential for ruptures)
- Urinary Bladder
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