V/Q ratio and gas exchange — Flashcards

Flashcard 1: What type of V/Q mismatch occurs due to pulmonary embolus?_____

Answer: Dead space*

Flashcard 2: What type of V/Q mismatch occurs due to airway obstruction? _____

Answer: Shunt (perfusion but no ventilation)

Flashcard 3: Does 100% O2 improve PaO2 in V/Q mismatch due to physiologic dead space? _____

Answer: Yes, assuming < 100% dead space

Flashcard 4: Both ventilation and perfusion are _____ at the base of the lung than at the apex of the lung

Answer: greater

Flashcard 5: _____ is perfusion of lung regions that are not ventilated (V/Q = 0)

Answer: Shunt

Flashcard 6: _____ is perfusion of lung regions that are not ventilated (V/Q = 0)

Answer: Shunt

Extra:  Watch associated Bootcamp video [https://app.bootcamp.com/med-school/pulmonology/videos/blood?index=8] https://onlinemeded.org?ref=anki 

Flashcard 7: The V/Q ratio at the base of the lung is normally _____, indicating wasted perfusion

Answer: 0.6

Extra:  Watch associated Bootcamp video [https://app.bootcamp.com/med-school/pulmonology/videos/blood?index=6] https://onlinemeded.org?ref=anki 

Flashcard 8: In zone _____ of the lung, high alveolar pressure may compress the capillaries and reduce blood flow in this zone

Answer: 1

Extra:  Watch associated Bootcamp video [https://app.bootcamp.com/med-school/pulmonology/videos/blood?index=6] https://onlinemeded.org?ref=anki 

Flashcard 9: In the lungs, hypoxia causes vaso-_____

Answer: constriction

Extra:  Watch associated Bootcamp video [https://app.bootcamp.com/med-school/pulmonology/videos/blood?index=4] https://onlinemeded.org/spa/pulmonology?ref=anki 

Flashcard 10: Certain organisms that thrive in high O2 (e.g. TB) flourish in the _____ of the lung

Answer: apex

Extra:  Watch associated Bootcamp video [https://app.bootcamp.com/med-school/pulmonology/videos/blood?index=6] https://onlinemeded.org?ref=anki