Podcast
Questions and Answers
What is the ratio of FEV1 to FVC in obstructive lung diseases?
What is the ratio of FEV1 to FVC in obstructive lung diseases?
- 3L/4L = 75%
- 150L/min (male)
- 125L/min (female)
- 1L/5L = 20% (correct)
Which lung function test is used to assess timed vital capacity?
Which lung function test is used to assess timed vital capacity?
- Flow-volume loop
- Maximum voluntary ventilation
- Volume-time curve (correct)
- Respiratory minute volume
What is the normal respiratory minute volume for males?
What is the normal respiratory minute volume for males?
- 3L/4L = 75%
- 150L/min (correct)
- 1L/5L = 20%
- 125L/min
Which lung function characteristic is typical of restrictive lung diseases?
Which lung function characteristic is typical of restrictive lung diseases?
What does the flow-volume loop help differentiate between?
What does the flow-volume loop help differentiate between?
Where is blood flow lowest in the lung according to the zones described?
Where is blood flow lowest in the lung according to the zones described?
In which zone does blood flow show a 5-fold difference between the top and bottom of the lung?
In which zone does blood flow show a 5-fold difference between the top and bottom of the lung?
What happens to both airflow and blood flow as one moves down the lung?
What happens to both airflow and blood flow as one moves down the lung?
Where is the VA/Q ratio optimal for gas exchange?
Where is the VA/Q ratio optimal for gas exchange?
What characterizes the apical alveoli with regards to perfusion?
What characterizes the apical alveoli with regards to perfusion?
In which zone is ventilation proportionately greater than blood flow?
In which zone is ventilation proportionately greater than blood flow?
What is the volume of air that never takes part in gas exchange areas?
What is the volume of air that never takes part in gas exchange areas?
In a healthy individual, what is physiological dead space approximately equal to?
In a healthy individual, what is physiological dead space approximately equal to?
What is the formula to calculate pulmonary ventilation?
What is the formula to calculate pulmonary ventilation?
Which type of dead space involves the volume of air in the alveoli that are nonfunctioning?
Which type of dead space involves the volume of air in the alveoli that are nonfunctioning?
If a patient's respiratory rate doubles, how would this affect alveolar ventilation?
If a patient's respiratory rate doubles, how would this affect alveolar ventilation?
What is the significance of understanding the ventilation-perfusion ratio in different parts of the lung?
What is the significance of understanding the ventilation-perfusion ratio in different parts of the lung?
