Difficulty: Medium
Average Score: 69%
Simulated
A nurse is preparing to administer 5 units of regular insulin and 20 units of NPH insulin to a client who has type 1 diabetes mellitus. Which of the following actions should the nurse take first?
Correct answer
A
Rationale
Injecting 20 units of air into the NPH insulin vial first equalizes pressure, preventing a vacuum and facilitating accurate withdrawal.