V/Q mismatch in COPD — Flashcards

Flashcard 1: Does 100% O2 improve PaO2 in V/Q mismatch due to physiologic dead space? _____

Answer: Yes, assuming < 100% dead space

Flashcard 2: Increased VA/Q results in _____

Answer: alveolar dead space

Flashcard 3: _____ is perfusion of lung regions that are not ventilated (V/Q = 0)

Answer: Shunt

Flashcard 4: A decrease in PAO2 causes a hypoxic _____ that shunts blood away from poorly ventilated regions of the lung

Answer: vasoconstriction

Flashcard 5: In a patient with a pulmonary emboli, V/Q lung scan shows mismatch due to abnormal _____

Answer: perfusion

Flashcard 6: The _____ ratio is the ratio of alveolar ventilation to pulmonary blood flow

Answer: ventilation/perfusion (V/Q)

Flashcard 7: _____ 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 8: 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 9: 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 10: 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