Pulmonary Function Testing
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Questions and Answers

What is the purpose of converting parameters measured at ATPS to BTPS?

  • To automatically correct measurements made by older PFT machines.
  • To correct for the difference in ambient temperature between the room and the body.
  • To account for changes in barometric pressure during measurement.
  • To ensure accurate measurement of lung volumes by correcting for environmental cooling of exhaled gas. (correct)

    • What factor is required to convert ATPS measurements to BTPS in Vmax equipment?

  • Anatomic site identification
  • Barometric pressure
  • Correction factor (correct)
  • Humidity level

    • Which of the following is classified as an obstructive lung disease?

  • Cardiovascular disease
  • Asthma (correct)
  • Pulmonary fibrosis
  • Obesity

    • What kind of lung defect is characterized by lung volumes lower than normal?

    <p>Pulmonary fibrosis</p> Signup and view all the answers

    In pulmonary function tests, what is the purpose of assessing reversible airway obstruction?

    <p>To measure the effect of bronchodilator use.</p> Signup and view all the answers

    Why might older labs with outdated equipment require RRT to perform calculations?

    <p>Because they lack automatic conversion to BTPS.</p> Signup and view all the answers

    What is a positive response according to ATS/ERS after administering Albuterol with holding chamber?

    <p>10% increase in FVC</p> Signup and view all the answers

    Why are patients often prescribed MDIs even if no response is seen on PFT test results?

    <p>Because PFT testing may not always detect airway disease</p> Signup and view all the answers

    What must patients discontinue prior to Bronchial Challenge Testing?

    <p>All inhalers</p> Signup and view all the answers

    What is the significance of determining the PD₂ₒ during Bronchial Challenge Testing?

    <p>To determine the concentration required to produce a drop in FEV1 of 20% or greater</p> Signup and view all the answers

    What is an essential step in preparing for Pulmonary Function Tests (PFTs) according to the text?

    <p>Suspending the use of bronchodilators prior to the test</p> Signup and view all the answers

    What does a decreased DLCO indicate during lung diffusion testing?

    <p>Impaired gas exchange in the lungs</p> Signup and view all the answers

    How is Forced Expiratory Flow 25-75% calculated?

    <p>By a computer using the volume-time curve of expiration</p> Signup and view all the answers

    What is one reason for patients needing 10-12 seconds to exhale fully during PFTs?

    <p>Significant expiratory flow limitations due to COPD</p> Signup and view all the answers

    What is the purpose of body plethysmography in pulmonary function testing?

    <p>To measure functional residual capacity</p> Signup and view all the answers

    During a helium dilution test, what does a failure to equilibrate indicate?

    <p>Presence of an air leak in the equipment</p> Signup and view all the answers

    Which condition may lead to an increased washout time during a nitrogen washout test?

    <p>Obstructive lung disease</p> Signup and view all the answers

    According to ATS/ERS standards for pulmonary function testing, what is a key requirement for test reproducibility?

    <p>Two FVC measures varying by more than 150 ml</p> Signup and view all the answers

    What is the normal range for the Maximum Voluntary Ventilation (MVV) test?

    <p>170 L/min</p> Signup and view all the answers

    In the Impulse Oscillometry System (IOS), what value indicates abnormal airway resistance?

    <p>&gt; 2 cm H20/L/s</p> Signup and view all the answers

    What is the purpose of converting parameters measured at ATPS to BTPS?

    <p>To ensure accurate volume measurements considering ambient factors</p> Signup and view all the answers

    Why might patients need 10-12 seconds to exhale fully during Pulmonary Function Tests (PFTs)?

    <p>To allow for complete measurement of lung volumes in all patients</p> Signup and view all the answers

    In the context of lung defect classifications, what indicates an Obstructive lung disease?

    <p>Expiratory flow greater than normal</p> Signup and view all the answers

    What factor is required in Vmax equipment to convert ATPS measurements to BTPS?

    <p>Correction factor</p> Signup and view all the answers

    What does a decreased DLCO indicate during lung diffusion testing?

    <p><em>Pulmonary fibrosis (IPF)</em></p> Signup and view all the answers

    What is the significance of determining the PD₂ₒ during Bronchial Challenge Testing?

    <p><em>To evaluate airway response</em></p> Signup and view all the answers

    What is the purpose of the Helium Dilution test in pulmonary function testing?

    <p>To determine the lung volume by diluting helium</p> Signup and view all the answers

    During a nitrogen washout test, what does a washout time of over 7 minutes indicate?

    <p>Air trapping</p> Signup and view all the answers

    In the 6-Minute Walk test, what is an indicator for the need of further cardiopulmonary testing?

    <p>Increased heart rate post-walk</p> Signup and view all the answers

    What does the Maximum Voluntary Ventilation (MVV) test assess in patients?

    <p>Ventilatory reserve capacity</p> Signup and view all the answers

    What is the normal range of airway resistance measured by the Impulse Oscillometry System (IOS)?

    <p>1-2 cm H20/L/s</p> Signup and view all the answers

    What criteria need to be met for a Pulmonary Function Test (PFT) to be classified as reproducible according to ATS/ERS standards?

    <p>Three largest FRC measurements within 5% of each other</p> Signup and view all the answers

    What is the normal value for Forced Expiratory Flow 25-75% in a healthy individual?

    <p>4-5 L/sec</p> Signup and view all the answers

    Which of the following is NOT a common contraindication for Pulmonary Function Tests (PFTs)?

    <p>Recent ankle sprain</p> Signup and view all the answers

    Why do some COPD patients need 10-12 seconds to exhale fully during Pulmonary Function Tests?

    <p>To achieve complete exhalation as their condition progresses</p> Signup and view all the answers

    What does the Forced Expiratory Volume in 1 second (FEV1) measure during a Pulmonary Function Test?

    <p>Volume exhaled during the first second of forced exhalation</p> Signup and view all the answers

    What is the mechanism by which the Provocative Dose 20 (PD₂₀) is determined in Bronchial Challenge Testing?

    <p>Calculating the dose required for a 20% drop in FEV1</p> Signup and view all the answers

    In what sequence are the three tests of lab-based Pulmonary Function Tests typically conducted?

    <p>Spirometry, Lung Volumes, Lung Diffusion</p> Signup and view all the answers

    What is the primary purpose of bringing a list of all medications when preparing for Pulmonary Function Tests?

    <p>To identify any medications that may need to be suspended before the test</p> Signup and view all the answers

    What is the purpose of using Nitrogen Washout in measuring lung volumes?

    <p>To measure functional residual capacity indirectly</p> Signup and view all the answers

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