sunny2
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In flail chest :
1. injured part protrudes inward during expiration
2. injured part protrudes outward during inspiration
3. injured part stays constant during inspiration and expiration
4. injured part moves on it's sweet will
5. damn it , it's too confusing -inspiration expiration inward outward
6. none of the above
7. all are true
8. leave me alone says the injured part 
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| study_ing
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5..duz exactly opposite of what its supposed do..here its the change in intrapleural pressure cozing the movement of the flail part rather than the (normal) other way around
INspiration- INward movement- due to -ve pressure
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| GDS2008
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8. Leave me alone says the injured part. I know for sure that this is the correct answer in this instance
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| study_ing
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is that due to pain? mayb thats y its not moving
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| sunny2
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right answer is 6
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| sunny2
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but you are correct, just supplement urself with this:
Flail chest is a clinical anatomic diagnosis noted in blunt trauma patients with paradoxical or reverse motion of a chest wall segment while spontaneously breathing. This clinical finding disappears after intubation with positive pressure ventilation, which occasionally results in a delayed diagnosis of the condition.
The strict definition of 3 ribs broken in 2 or more places can be confirmed only by x-ray, but the inherent structural stability of the chest wall due to ribs and intercostal muscles usually does not show abnormal or paradoxical motion without 3 or more ribs involved. Patients may demonstrate only the paradoxical chest wall motion, and they may have minimal-to-incapacitating respiratory insufficiency, although they usually show some tachypnea with a notable decrease in resting tidal volume due to fracture pain. The degree of respiratory insufficiency is typically related to the underlying lung injury, rather than the chest wall abnormality
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| sunny2
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Good Night 
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| frank100
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my girlfriend got this one wrong too. and 4 of my friends.
sunny, one of these days you´re gonna cause a serial heart attack case.
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| tolito
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i dont get this question. i know that a flail chest refers to a segment of the rib cage that lacks attachment to the rest and lacks stability. that is why it is refered to as being flail.
more than 3 consecutive ipsilateral ribs must be broken in 2 or more places each (ie consecutive segmental fractures of more than 3 ipsilateral ribs) for the segment to be flail
single fracture of 3 or more consecutive ribs on either side of the sternum will also lead to flail chest.
paradoxical movement occurs in the flail segment and is responsible for the mismatch in V/Q. during inspiration the flail segment is sucked in by negative pressure and during expiration, it is pushed out by pos pressure. this is called paradoxical cos it is the opposite of normal.
you dont want to leave the flail segment alone cos the patient will be in severe respiratory embarassment. so you give pos press vent and in the absence of that, you strap the flail segment down as this prevents its floppy movements.
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