In COPD patient there is compensatory polycythemia develop in patient. Most important priority in this patient is?

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 2 p. 40-42
E6 Nursing Fundamentals Taylor p. 723-725
Practise the full PGIMER NO - 2020
Attempt every question from this paper in a timed mock, then review the full solution for each one.