VQ mismatch

0.0(0)
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/4

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

5 Terms

1
New cards

What does VQ mismatch mean?

  • imbalance between ventilation and perfusion = inefficient gas exchange

2
New cards

What is ventilation?

  • air that reaches alveoli in the lungs

3
New cards

What is perfusion?

  • blood that reaches the alveoli via the pulmonary capillaries

  • = uptake of o2 and removal of co2

4
New cards

What are the causes of VQ mismatch?

  • pulmonary embolism - blockage in pulmonary artery = reduced perfusion to part of lung = areas that are ventilated but not perfused (high V/Q ratio)

  • COPD - areas of lung poorly ventilated due to airway obstruction = areas perfused but not well ventilated (low VQ ratio)

  • pneumonia - infection in lungs = fluid + inflam cells to fill alveoli = impairing ventilation (low VQ ratio)

5
New cards

What are the consequences of VQ mismatch?

  • hypoxaemia

  • hypercapnia