A patient suddenly develops respiratory difficulties such as dyspnoea what is the first priority of the nursing officer?

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E6 Nursing Fundamentals Taylor p. 723-725
E6 Nursing Fundamentals Potter Perry 12e Part 5 p. 36-38
Practise the full HPSSC Staff Nurse - 2021
Attempt every question from this paper in a timed mock, then review the full solution for each one.