Podcast
Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App
Questions and Answers
What is the classical explanation for worsening hypercapnia in patients with chronic CO2 retention exposed to high levels of inspired oxygen?
What is the classical explanation for worsening hypercapnia in patients with chronic CO2 retention exposed to high levels of inspired oxygen?
- Stimulation of hypoxic drive to breathe
- Suppression of hypoxic drive to breathe (correct)
- Increased hypoxic drive to breathe
- Enhanced hypercapnic drive
What is an important cause of hypoxemia in patients with COPD?
What is an important cause of hypoxemia in patients with COPD?
- Increased alveolar ventilation
- Ventilation–perfusion mismatch (correct)
- Enhanced oxygen diffusion
- Decreased perfusion mismatch
What happens to ventilation–perfusion (Va/Q) ratio when PaO2 is increased through supplemental oxygen administration?
What happens to ventilation–perfusion (Va/Q) ratio when PaO2 is increased through supplemental oxygen administration?
- It remains unchanged
- It decreases due to abolished hypoxic pulmonary vasoconstriction (HPV) (correct)
- It increases due to enhanced hypoxic pulmonary vasoconstriction (HPV)
- It fluctuates randomly
What effect does increased perfusion have on better ventilated alveolar units in COPD patients receiving supplemental oxygen?
What effect does increased perfusion have on better ventilated alveolar units in COPD patients receiving supplemental oxygen?
Signup and view all the answers
What happens to the gradient for CO2 when alveolar oxygen diffusion is enhanced through supplemental oxygen administration?
What happens to the gradient for CO2 when alveolar oxygen diffusion is enhanced through supplemental oxygen administration?
Signup and view all the answers
Flashcards are hidden until you start studying
