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12 Cards in this Set
- Front
- Back
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How would you measure lung compliance?
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plot a static pressure-volume graph and measure the slope near FRC
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why is peak flow considered a poor tool in quantifying obstructive ventilatory defect?
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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. |
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how does FEV1 change in obstructive lung disease?
how does FEF25-75 change in obstructive lung disease? |
both decrease
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in what disease is PEF especially useful
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in asthamatics - used as an index of activity of the disease process
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are predicted values of PEF of use in detecting lung disease?
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not really since variability b/w healthy subjects is very large
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if you have extrathoracic obstruction, will inspiration or expiration be problematous?
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inspiration
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ifyou have intrathoracic osbtruction, will inspiration or expiration be the problem?
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expiration
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when you're looking at extra/intra pulmonary obstruction, what graph are you looking at?
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flow vs. volume loop
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woudl sleep apnea be an example of an extra or intrathoracic obstruction? variable or fixed?
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variable extrathoracic
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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?
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FEV1; 200 ml
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in a pt with obstructive lung disease, what would you expect their FRC, VC, and RV to be
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FRC - hi
VC - lower RV - hi |
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diff bw centriacinar and panacinar emphysema
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pan - no intervening lung parenchyma - everywhere
centriacinar - mainly in apex of lungs |
