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12 Cards in this Set

  • Front
  • Back
How would you measure lung compliance?
plot a static pressure-volume graph and measure the slope near FRC
why is peak flow considered a poor tool in quantifying obstructive ventilatory defect?
It is considered a poor tool because the measurement is highly effort dependent. peak flow measurements can be used for monitoring variations in obstruction in asthmatic
patients over time.
how does FEV1 change in obstructive lung disease?

how does FEF25-75 change in obstructive lung disease?
both decrease
in what disease is PEF especially useful
in asthamatics - used as an index of activity of the disease process
are predicted values of PEF of use in detecting lung disease?
not really since variability b/w healthy subjects is very large
if you have extrathoracic obstruction, will inspiration or expiration be problematous?
ifyou have intrathoracic osbtruction, will inspiration or expiration be the problem?
when you're looking at extra/intra pulmonary obstruction, what graph are you looking at?
flow vs. volume loop
woudl sleep apnea be an example of an extra or intrathoracic obstruction? variable or fixed?
variable extrathoracic
what value post-bronchodilation do you check to see if it has changed by 12%? what is the minimum absolute value it should increase by to be deemed significant?
FEV1; 200 ml
in a pt with obstructive lung disease, what would you expect their FRC, VC, and RV to be
FRC - hi
VC - lower
RV - hi
diff bw centriacinar and panacinar emphysema
pan - no intervening lung parenchyma - everywhere

centriacinar - mainly in apex of lungs