Podcast
Questions and Answers
What is the recommended timing method for conducting the single-breath DLCO maneuver?
What is the recommended timing method for conducting the single-breath DLCO maneuver?
- Smith and Johnson method
- Jones and Meade method (correct)
- Brown and Miller method
- Taylor and Clark method
What is the acceptable timeframe for rapid inspiration to TLC from RV during the DLCO maneuver?
What is the acceptable timeframe for rapid inspiration to TLC from RV during the DLCO maneuver?
- 5-8 seconds
- > 15 seconds
- 10-12 seconds
- < 4 seconds (correct)
How much volume should be inspired during the DLCO maneuver relative to VC?
How much volume should be inspired during the DLCO maneuver relative to VC?
- ~50% of VC
- ~70% of VC
- ~85% of VC (correct)
- ~100% of VC
What is the recommended dead space washout volume during the DLCO maneuver?
What is the recommended dead space washout volume during the DLCO maneuver?
What is the acceptable timeframe for collecting the alveolar gas sample during the DLCO maneuver?
What is the acceptable timeframe for collecting the alveolar gas sample during the DLCO maneuver?
How much time should be allowed between DLCO tests?
How much time should be allowed between DLCO tests?
What is the formula to calculate % decrease in FEV1?
What is the formula to calculate % decrease in FEV1?
What is an indicator to stop the test during bronchial challenge testing?
What is an indicator to stop the test during bronchial challenge testing?
Which value is used to calculate the fraction of medication delivered to the lower airways?
Which value is used to calculate the fraction of medication delivered to the lower airways?
What should be monitored if FEV1 is not sensitive in some asthmatics?
What should be monitored if FEV1 is not sensitive in some asthmatics?
Which parameter requires knowledge of TI/Ttot for its calculation?
Which parameter requires knowledge of TI/Ttot for its calculation?
What does a decrease in sGaw of 35%-45% indicate during a test?
What does a decrease in sGaw of 35%-45% indicate during a test?
How is the FRC calculated in the Open Circuit Multiple Breath N2 Washout test?
How is the FRC calculated in the Open Circuit Multiple Breath N2 Washout test?
What is the purpose of correcting for 'N2tissue' in the FRC calculation?
What is the purpose of correcting for 'N2tissue' in the FRC calculation?
What assumption is made in the Closed-Circuit/Multiple-Breath Helium (He) Dilution test?
What assumption is made in the Closed-Circuit/Multiple-Breath Helium (He) Dilution test?
What is added to the spirometer initially in the Closed-Circuit/Multiple-Breath Helium (He) Dilution test?
What is added to the spirometer initially in the Closed-Circuit/Multiple-Breath Helium (He) Dilution test?
Why is oxygen added to the system in the Closed-Circuit/Multiple-Breath Helium (He) Dilution test?
Why is oxygen added to the system in the Closed-Circuit/Multiple-Breath Helium (He) Dilution test?
How long does it usually take for equilibration of helium concentration between the lungs and rebreathing system in the Closed-Circuit/Multiple-Breath Helium (He) Dilution test?
How long does it usually take for equilibration of helium concentration between the lungs and rebreathing system in the Closed-Circuit/Multiple-Breath Helium (He) Dilution test?
What can cause an overestimation of FRC using dilutional techniques?
What can cause an overestimation of FRC using dilutional techniques?
Which element is crucial for accurately measuring FRC using dilutional techniques?
Which element is crucial for accurately measuring FRC using dilutional techniques?
In pulmonary function testing, which value indicates the severity of obstruction?
In pulmonary function testing, which value indicates the severity of obstruction?
Which step is recommended in the evaluation process of pulmonary function testing following the review of graphs?
Which step is recommended in the evaluation process of pulmonary function testing following the review of graphs?
What can a 20% - 30% increase in FEF25%-75% indicate during pulmonary function testing?
What can a 20% - 30% increase in FEF25%-75% indicate during pulmonary function testing?
What is the significance of a decrease in FEV1/FVC ratio?
What is the significance of a decrease in FEV1/FVC ratio?
In obstructive lung diseases affecting medium and smaller airways, what shape does the expiratory limb of the flow volume loop take?
In obstructive lung diseases affecting medium and smaller airways, what shape does the expiratory limb of the flow volume loop take?
Which type of obstruction is characterized by decreased flow rates on both inhalation and exhalation with a square-like appearance in the flow volume loop?
Which type of obstruction is characterized by decreased flow rates on both inhalation and exhalation with a square-like appearance in the flow volume loop?
What causes the intrathoracic variable obstruction to have normal inspiratory flows but flattened expiratory flows?
What causes the intrathoracic variable obstruction to have normal inspiratory flows but flattened expiratory flows?
Which condition is an example of a fixed obstruction?
Which condition is an example of a fixed obstruction?
What mnemonic is used to differentiate variable extrathoracic and variable intrathoracic obstruction?
What mnemonic is used to differentiate variable extrathoracic and variable intrathoracic obstruction?
What effect does obstructive lung disease have on expiratory flow rates?
What effect does obstructive lung disease have on expiratory flow rates?
