When mixing insulin, which order should you draw and why?

When mixing insulin, which order should you draw and why?

• A. It doesn't matter.
• B. Draw cloudy insulin first, then clear to avoid contaminating the clear solution.
• C. Draw clear insulin first, then cloudy to avoid contaminating the clear solution.
• D. Draw insulin from separate vials sequentially but no order matters.

Answer: (C)

The main idea is that you must preserve the purity of the clear insulin when you mix two types from separate vials. Draw the clear insulin first, then the cloudy insulin. This minimizes the chance that any cloudy insulin contaminates the clear dose in the syringe, which could alter the amount of clear insulin you’re administering and affect how quickly it acts. In practice, you typically inject air into the cloudy vial first, then into the clear vial, withdraw the clear insulin first, and finally the cloudy insulin. Saying the order doesn’t matter or starting with the cloudy insulin increases the risk of cross-contamination and dose inaccuracy.

The main idea is that you must preserve the purity of the clear insulin when you mix two types from separate vials. Draw the clear insulin first, then the cloudy insulin. This minimizes the chance that any cloudy insulin contaminates the clear dose in the syringe, which could alter the amount of clear insulin you’re administering and affect how quickly it acts. In practice, you typically inject air into the cloudy vial first, then into the clear vial, withdraw the clear insulin first, and finally the cloudy insulin. Saying the order doesn’t matter or starting with the cloudy insulin increases the risk of cross-contamination and dose inaccuracy.