PFT Flashcards
The principle that gas flow is proportional to the pressure drop across a known resistance is used by which of the following devices?
a) Turbine flowmeter
b) Thermal flowmeter
c) Ultrasonic pneumotachograph
d) Fleisch pneumotachograph
e) c) and d)
d) Fleisch pneumotachograph
Which of the following is not a contraindica”on for pulmonary func”on tes”ng? a) Pneumothorax
b) Recent eye surgery
c) Pulmonary embolism
d) Coughing
e) Recent myocardial infarc”on
d) Coughing
Which of these elements of a FVC determines if the pa”ent had a good start of test?
a) FVC test results being within ATS criteria
b) Predicted popula”on compara”ve values for the pa”ent
c) FEV1 test results being with ATS criteria
d) That the pa”ent gave good effort for tes”ng
e) The back-extrapolated volume measurement
e) The back-extrapolated volume measurement
Which of the following best describes Vital Capacity (VC) in adults?
a) It varies inversely with height and directly with age.
b) It may vary with race or ethnic origin.
c) It may easily vary as much as 20% in comparable individuals.
d) All of the above.
e) b) and c)
e) b) and c)
Variable intrathoracic obstruc”on
A pa”ent who produces a flow-volume loop representing a fixed obstructive pa!ern:
I. May be stridorous with increased work of breathing
II. May demonstrate exercise intolerance
III. May be prone to recurrent aspira”on pneumonias
IV. May be at risk of sudden catastrophic hemorrhage
V. May have a hoarse voice
I, II, and V
Toward the end of a multi breath Nitrogen Washout test, the expired N2 concentration begins rising. What is the most likely cause?
a) The pa”ent is trying too hard.
b) There is a leak in the system.
c) The test is nearing comple”on.
d) The apices are star”ng to empty.
b) There is a leak in the system.
The “res”ng level” is best defined as?
a) Occurring at peak inspira”on
b) Occurring at RV
c) Occurring when the elas”c forces of the lungs and chest wall are equal
d) The pulmonary func”on value when the pa”ent is in the supine posi”on
c) Occurring when the elastic forces of the lungs and chest wall are equal
What Do You Report for FVC
Highest
In a healthy individual, the functional residual capacity is expected to be what percentage of total lung capacity?
a) 10%
b) 20%
c) 40%
d) 50%
e) 60%
c) 40%
Which of the following is/are advantages of body plethysmography?
a) It is portable and therefore a useful tool for bedside pulmonary function studies.
b) The ability to perform all pulmonary function tests within it
c) Volumes measured in the thorax includes all gas-containing structures
d) Both b) and c)
e) Both a) and c)
c) Volumes measured in the thorax includes all gas-containing structures
You have just given your pa”ent a 0.03mg/ml dose of methacholine to assess for asthma. The subsequent FVC shows no change. What should you do next?
a) Report to the physician that the pa”ent does not have asthma.
b) Wait one (1) hour and repeat then test at the same dose.
c) Have the pa”ent return tomorrow to repeat the test.
d) Double the dose and repeat the FVC maneuver.
e) None of the above.
d) Double the dose and repeat the FVC maneuver.
Which of the following statements apply to minute ventilation
I. Normal people increase minute ventilation by raising both the “dal volume and respiratory rate.
II. Early in exercise, a higher tidal volume produces most of the increase in minute ventilation
III. Early in exercise, an increased respiratory rate produces most of the increase in minute ventilation
IV. After~ 50-60% of the vital capacity is reached, “dal volume plateaus and increased respiratory rate is responsible for additional minute ventilation increases.
I, II, IV
At maximal exercise, hyperven”la”on adequately compensates for lac”c acidosis or anaerobic metabolism.
a) True
b) False
b) False
Which of the following are rela”ve contraindica”ons for performing a pulmonary func”on test?
I. Recent eye surgery
II. Unstable cardiovascular status
III. Untreated pneumothorax
IV. Hemoptysis of unknown origin
All of the above
