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PFT MIDTERM EXAM QUESTIONS AND ANSWERS CORRECT 100% VERIFIED.
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PFT MIDTERM EXAM QUESTIONS AND ANSWERS CORRECT 100% VERIFIED.
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PFT MIDTERM EXAM QUESTIONS ANDANSWERS CORRECT 100% VERIFIED.
In restrictive lung disease, which lung volume compartment is not
decreased?
Correct Answer -None of the above
During the measurement of FRC using the body plethysmograph, at least
three to five satisfactory panting maneuvers should be obtained, with at
least three FRC values that agree within:
Correct Answer -5%
During the multiple-breath open-circuit nitrogen (N2) washout, N2 is
washed out of the lungs while the patient breathes:
Correct Answer -100% O2
Total lung capacity can be measured by all of the following except:
Correct Answer -Water-displacement test
When measuring FRC in the body plethysmograph, the relationship between
mouth pressure and body box volume changes occur during:
Correct Answer -The closed shutter manuever
All the following are criteria for an acceptable DLCO maneuver except:
Correct Answer -Smooth expiration that is more than 4 seconds
,The rate of diffusion of a gas across the alveolar-capillary membrane
depends on all of the following except:
Correct Answer -None of the above
The maximum number of attempts at a DLCO should be?
Correct Answer -5
The single-breath DL,CO test requires the use of which inspired gases?
Correct Answer -0.3% Co and inert gas
CO is used for measuring the diffusion ability of the lungs because:
Correct Answer -Combines with Hb molecules much like oxygen does.
During the breath-hold portion of the DL,CO maneuver, it is recommended
that the patient not create excessive positive intra-thoracic pressure
because:
Correct Answer -It may cause the DLCO to be reduced
The following DL,CO results are obtained from a patient:
Maneuver 1: DL,CO = 18.4 mL/min/mm Hg
Maneuver 2: DL,CO = 14.2 mL/min/mmHg
Which of the following is most appropriate:
Correct Answer -Perform additional manuevers
, In patients with emphysema the DL,CO is reduced because of:
Correct Answer -Loss of alveolar-capillary membrane surface area
Which of the following disorders commonly have a low DLCO:
Correct Answer -Pulmonary fibrosis
An inert gas is included in the single-breath DL,CO test inspired gas mixture
to:
Correct Answer -Measure reduction in CO concentration because of dilution
According to the 2005 ATS/ERS guidelines for DL,CO, correction for
hemoglobin (Hb) in adult males assumes a standard Hb of:
Correct Answer -14.6 g/dL
According to the 2005 ATS/ERS guidelines for DL,CO, the breath-hold time
should be:
Correct Answer -8 to 12 seconds
According to the 2005 ATS/ERS guidelines for DL,CO, at least two acceptable
maneuvers must be performed and agree within:
Correct Answer -10% or 3 units, whichever is larger
Which of the following is not a reason for an increased DL,CO:
Correct Answer -Pneumonectomy
CO has an affinity for Hb that is:
Correct Answer -210 times that of O2
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