PHTLS EXAM PREP 2022 with complete solution

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1. what are newton's 1st & second laws?: 1: a body at rest will remain at rest, and a body in motion will remain in motion until acted upon by an outside force 2: force = mass x accelleration 2. w ... hat are the rule of 9's?: ADULT 9% = entire head 9% = entire arm 9% =chest 9% =abdomen 18% = entire back 18% = entire leg 1% perineum CHILD 18% = entire head 9% =entire arm 9% = chest 9% = abdomen 18% = entire back 14% = entire leg 1% = perineum 3. what are the signs/symptoms of spinal injury?: neurologic function above the injury is intact and function below the injury is absent or markedly diminished. Specific manifestations will depend on the exact level of injury. 4. what are the (5) major areas of blood loss?: - external - chest - abdomen - pelvis - long bones 5. what are the (3) types of blast injuries?: Primary injuries are caused by the effect of transmitted blast waves on gas-containing structures; secondary injuries, by the impact of airborne debris; tertiary injury, by the transposition of the entire body because of blast wind or structural collapse; and quaternary injuries, by all other forces 6. what 3 collisions are involved with an MVA?: 1. vehicle collides with an object 2. unrestrained occupant collides with inside of car 3. internal organs collide with one another or with the wall of the cavity that contains them 7. what is o'donohue's triad?: adult pedestrian vs car accident - adults tend to protect themselves by turning away 1 - bumper vs lower legs; tib/fib#, knee tear 2 - falls towards bonnet; intra-abdominal/thoracic injury, #femur/pelvis/tho- rax/spine. 3 - strikes ground; deceleration/compression forces, head injuries 8. what is waddell's triad?: child vs car - children tend to face the oncoming vehicle 1 - bumper vs fermur/pelvis 2 - bonet vs thorax; head/neck flexes forward; head/face/neck may collide with bonnet. 3 - strikes ground/dragged under car. 9. what is the munro-kellie doctrine?: 1. The total intracranial volume if fixed because of the inelastic nature of the skull 2. Inside the skull is the brain, blood & CSF 3. If ICP is increased (via haematoma, swelling or tumour) the skull cannot expand to accommodate this 4. As a result some other structure must be forced out 5. First the CSF & Blood are forced out 6. The only way out is through the foramen magnum 7. Once the ability to force out CSF & blood has been exhausted, the ICP rises rapidly & the next structure to be forced out of the vault is the brain 8. One of the first parts of the brain to be forced out is the medulla oblongata causing an alteration in respirations [Show More]

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