study_ing
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sorry my mind is totally nonfunctional..i viewed it yesterday but was somehow lost even though im ive seen this q b4 and its a simple one...i'll try any how...
is the ans C
B is a vol v calculate in a lung taken out of the pt i think so its ruled out...
30 cm sounds very positive..
FRC by definition is at end of expiration of a tidal volume. firstly pressure wud be zero at this stage (Maybe) secondly TV is another similar option so id rule both of them out
tlc wud be my second guess
this part i always confuse..the two extremes...a high pressure wud ideally be generated to expire volume out ...so the ans cud be RV..but it cud also correspond to the max volume when expirateory tendency is the max....
if u know the answer for sure, please post i hope i can recall a simple easie explanatioon
sorry this wasnt very helpful...
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| study_ing
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ok i checked..my mind was truly nonfxal...
FRC= pressure 0
correct...by definition
Minimal volume as above
at RV u feel like taking in air--so its a negative pressure
at TLC u feel like blowing out so its positive ..
hence ans TLC
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| tolito
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its a qbank q but for the life of me, cannot remember the answer. the patient is blowing air out so the pressure is positive. this is the only clue i have 
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| study_ing
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THE ANSWER IS TLC FOR SURE..( i checked)
sorry, let me repost it in an organised way
FRC by definition means the vol of the lung at the end of expiration. (at this point the pressure is 0. that is why expiration ended...)
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| study_ing
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TV is too nonspecific an answer so id rule it out any way..
the minimal volume of alung is that volume which remains in an excised lung..this lucky soul is alive..yet!
now u have two options RV or TLC
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| muzammil
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the answer is total lung capcaty as at residual volume the airway pressure shud be negative so that air cud flow in the lungs while at tlc the airway pressure is +ve so that air can flow out
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| study_ing
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exactly, muzammil completed the job as my net had gone beserk
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| sridevibandaru24
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yup! it is TLC
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| tolito
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good job guys. such simple questions should not weigh us down!!!!
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| vallia
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what is minimal volume?
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| study_ing
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the minimal volume of alung is that volume which remains in an excised lung
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| MRMAVERICK
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TLC
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| pocas
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the spirometre cant measure the RV , TLC , FRC. why the answer is TLC.
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| study_ing
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the q asks about what volume a given pressure corresponds to..
it duznt hav anything to do with the calculation of rv. etc
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