What is the first step in the process of mixing two different types of insulin?

The first step in mixing two types of insulin involves drawing air equal to the prescribed number of units. This is a crucial preparatory step because it helps to prevent contamination and preserve the integrity of both insulin types. By drawing air into the syringe, you create a vacuum that aids in drawing the insulin from the vials more effectively.

This method also helps to maintain the proper characteristics of the insulin, especially since mixing insulins can sometimes alter the effectiveness of the longer-acting versions. Ensuring that air is injected into the long-acting insulin vial before drawing up the solution prevents the formation of a vacuum, facilitating easier drawing of the insulin.

Following this initial step, the process would typically involve injecting air into the long-acting insulin bottle before proceeding to draw the appropriate amount of that insulin, and then drawing the short-acting insulin as required. Understanding this process is vital for safe and effective insulin administration.