CPFT Study Set Questions with All Correct Answers
What significance does the FEV1/FVC% have in determining lung disease? - Answer- This value will be decreased in Obstructive diseases and a normal value will be seen in Restrictive diseases.
What is the largest volume inhaled and exhaled over a...
CPFT Study Set Questions with All
Correct Answers
What significance does the FEV1/FVC% have in determining lung disease? - Answer-
This value will be decreased in Obstructive diseases and a normal value will be seen in
Restrictive diseases.
What is the largest volume inhaled and exhaled over a 12 sec period called? - Answer-
MVV (Max Voluntary Ventilation)
What is the formula for MVV? - Answer- # of breaths x volume (L or mL) x 5
Describe a Flow-Volume Loop? - Answer- Flow-Volume loops plot flow against volume
for both insp & exp maneuvers.
Volume is displayed horizontally (left to right) and Volume is displayed vertically (up and
down)
Exp is above the 0 flow baseline and Insp is below the baseline.
Name some way to determine patient effort. - Answer- PEFmax evaluates exp effort
MVV < FEV1 x 35
FVC > SVC
On a flow-volume loop the appearance of decreased FEF50% and FIF50% with
approximately equal values indicates what? - Answer- Fixed airway obstruction, tends
to appears as long flat oval.
How does Variable Extrathoracic obstruction appear on flow-volume loops? - Answer-
Extrathoracic obstructions appears with normal looking expiratory flows and significantly
decrease inspiratory flows.
A flow-volume loop with normal inspiratory flows and decreased expiratory flow is
indicative of what? - Answer- Variable Intrathoracic obstruction
Name 4 indications for pre/post bronchodilator testing. - Answer- FEV1 below 80% of
predicted
Unknown cause of cough
Known asthmatic conditions
suspected airway hyperreactivity
What are the required conditions for reversibility in FEV1? - Answer- Improvement of at
least 12% AND 0.200 L
, Formula for Percentage Change in FEV1 - Answer- (Post FEV1 - Pre FEV1) / Pre
FEV1= % change
What are the two major characteristics of lung function? - Answer- Lung volumes &
Flows
What is the Indication of a Restrictive disorder during spirometry testing? - Answer-
Decreased volumes are the primary indication of a restriction.
What is the indication of an obstructive disorder during spirometry testing? - Answer-
Decreased flow indicate obstructions
When testing children which spirometry value is best substituted for more accurate
results. - Answer- Use FEV0.5 instead of FEV1
Name the 3 static lung volumes. - Answer- Functional Reserve Capacity FRC
Residual Volume RV
Total Lung Capacity TLC
What is the Volume of gas that remains in the lungs at the end-expiratory level? -
Answer- FRC
Functional residual capacity
What is the typical value of FRC? - Answer- 2400ml or 2.4 L
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