What is the correct order of steps for mixing NPH and lispro insulins?

The correct order of steps for mixing NPH (a long-acting insulin) and lispro (a rapid-acting insulin) is based on ensuring the integrity and effectiveness of the insulin. The correct answer outlines a systematic approach:

1. Wash hands - This is the first step to ensure sterility and prevent contamination during the insulin mixing process.
2. Rotate NPH - NPH insulin needs to be mixed well because it contains suspension components that settle at the bottom of the vial. This step ensures a uniform suspension for accurate dosing.
3. Wipe vials - This step involves cleaning the top of the insulin vials with an alcohol swab to minimize the risk of introducing bacteria when puncturing the vial with a needle.
4. Air into NPH - By injecting air into the NPH vial before drawing insulin, it helps create a vacuum effect. This step is important for drawing out the correct amount since NPH is a suspension.
5. Air into lispro - Similarly, injecting air into the lispro vial prepares it for drawing as well. It is important to inject air into the vial for easier withdrawal of the insulin, but it is not necessary for rapid-acting insulin like lis