AM VaultPractice questions › Adult health: medicine › COPD
COPD
A practice question in the style of the AMC Part 1 MCQ exam. Choose your answer to see the explanation.
Why can high-flow oxygen raise PaCO2 in some COPD patients?
Show the answer
The answer is B: It worsens V/Q matching and how blood carries CO2.
Releasing hypoxic vasoconstriction sends blood to poorly ventilated lung, and oxygenated haemoglobin carries less CO2.
You have answered 7 free questions. Keep going in the course: more than 3,000 exam-style questions in a six-month plan, with a short lesson each day and flashcards that come back when you need them. Week 1 is free.
This question comes from Week 3 of AM Vault: Respiratory. That week has 133 more exam-style questions like it, 5 short lessons and 150 flashcards. The course starts free with Week 1 and reaches this topic in week 3, as part of a six-month plan with full mock exams along the way.
Start Week 1 freeTake the free readiness checkSpotted something wrong? Tell us.