Addicudo
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A patient has an increased airway resistance to gas flow but a normal compliance. In comparison to the findings in a healthy person, intrapleural pressure will be A.More positive during inspiration B.More negative during expiration C.Increased at functional residual capacity D.Normal during breath holding at total lung capacity E.Decreased during breath holding at total lung capacity
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| Leopard
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E:decreased during breath holding at total lung capacity
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| ssrpk
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E is correct, but C seems correct too!
according to this formula , Airflow = Pressure gradient/Resistance
more -ve intrapleural prerssure is required during inspiration inorder to create increased pressure gradient in the alveoli to overcome the resistance of airflow between alveoli and atmosphere,
by the same principle more +ve intrapleural pressure is required during expiration!
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| ssrpk
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Ok, i get it! its E because FRC is when all the muscles are relaxed, so intrapleural pressure will be normal, only the value of FRC will change!
good question!
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| Addicudo
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Dude .. this Question .. I got wrong .. !! The answer to the question Given was .. D) Normal during breath holding at total lung capacity .. which I couldnt precisely get thru with .. ! Althought I answered E in the first place .. !
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| Leopard
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No way dear.At TLC the patient is having maximum inspiration .Look at intrapleural pressure curve it is extremely Low.Are you confusing it with intra-alveolar pressure ?? Waiting for reply
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