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Advanced PFT Testing Questions and Answers
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Advanced PFT Testing Questions and Answers
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Advanced PFT Testing Questions and Answers(Single Breath-Breath-Hold Technique) how long should the patient hold their breath for
during the DLCO singlr breath technique - ANSWER-the patients should hold their
breath at a total lung capacity (TLC) for approximately 10 seconds.
A flow box measures flow with a: - ANSWER-Pneumotachometer
A patient has a bronchodilator study that shows a 17% increase in the FEV1 after the
bronchodilator is administered. What is the interpretation? - ANSWER-Significant
reversibility is present
A patient has a chronic cough of moderate amounts of thick secretions and has had
multiple attacks of bronchitis that add up to about 3 months of sickness over the last few
years. Which of the following exams would validate the diagnosis of COPD? -
ANSWER-PFTs
A patient has a predicted FVC of 6.5 l and a measure FVC of 5.2 l. What is the %
predicted for this test? - ANSWER-80%
A patient has an actual FVC of 2.8L and a predicted FVC of 3.7L. What is the percent
predicted? - ANSWER-76%
A patient in a wheelchair comes to your lab for PFT evaluation. They are paralyzed from
the waist down and unable to stand to have their height measured. How can their height
be estimated? - ANSWER-Arm span
A patient undergoing a nitrogen washout test has a leak. How will the measurement of
nitrogen be affected - ANSWER-The readout will increase
A patient with obstructive lung disease, compared to a healthy patient, would have a
decreased: - ANSWER-FEV1
Abnormal spirometry patterns fall into 2 categories: obstructive and restrictive. Which
statement regarding abnormal spirometry patterns is not true? - ANSWER-In restrictive
lung disease patients need longer time to get the air out.
Airway resistance (Raw) is usually defined as: - ANSWER-The pressure difference
between the ends of the airway divided by the flow rate of gas moving through the
airway
All are findings associated with obstructive lung disease EXCEPT: - ANSWER-
Decreased TLC
All are obstructive disease processes EXCEPT: - ANSWER-Sarcoidosis
, All are obstructive disease processes EXCEPT: - ANSWER-Sarcoidosis
All are used to determine reference values for PFT EXCEPT: - ANSWER-Smoking
history
All would contraindicate a PFT EXCEPT: - ANSWER-Smoking with the past 8 hours
An instrument that measures the amount of air breathed in and/or out and how quickly
the air is inhaled and expelled from the lungs while breathing through a mouthpiece best
describes - ANSWER-spirometer
Before interpreting the results, one should ascertain that the test was - ANSWER-
Acceptable and reproducible and that the patient's demographic data are correct
breifly expolain the Single Breath-Breath-Hold Technique "Modified Krogh Technique" -
ANSWER-Patient exhales to RV and then inspires a vital capacity breath (rapidly not
forced) of at least 85% of their VC in 4 seconds followed by a A special diffusion gas
mixture, From the spirometer ,A reservoir bag and By means of a demand valve
Evaluating symptoms and screening those at risk for lung diseases are: - ANSWER-
Diagnostic indications
Flow-volume loops that are narrowed because of diminished lung volumes will be seen
with which of the following conditions? - ANSWER-Kyphoscoliosis
FRC can be measured by one of three techniques. Which technique is not used to
measure FRC? - ANSWER-Simple spirometry
How can airway resistance be determined in the very young and the very old? -
ANSWER-Plethysmography
how can diffusion capacity be effected - ANSWER-it can be effected by the Factors that
change the membrane component, Alterations in Hb and, Capillary blood volume can
affect diffusion
how is DLCO reported - ANSWER-reported in milliliters of CO/minute/millimeter of
mercury at zero degrees Celsius, 760 mmHg, dry (i.e. standard temperature, pressure,
dry [STPD]).
How is FRC measured with plethysmography? - ANSWER-Patient pants against a
closed shutter valve
How many acceptable tests must be obtained when performing spirometry? -
ANSWER-3
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