A nurse is reinforcing teaching with a client who has diabetes mellitus and is taking insulin lispro and insulin glargine. Which of the following instructions should the nurse include in the teaching?
A.
“Draw up the insulin lispro and insulin glargine in separate syringes.”
B.
“Expect insulin glargine to be cloudy.”
C.
“Take an extra dose of insulin lispro prior to aerobic exercise.”
D.
“Anticipate that the insulin glargine will peak in 3 hours.”
The Correct Answer and Explanation is:
The correct answer is A. “Draw up the insulin lispro and insulin glargine in separate syringes.”
Explanation:
Insulin lispro and insulin glargine are both used in the management of diabetes mellitus but have different properties and purposes. Insulin lispro is a rapid-acting insulin, and insulin glargine is a long-acting insulin. Understanding their differences is crucial for correct administration.
- Insulin Lispro: This is a rapid-acting insulin with an onset of about 15 minutes, a peak effect around 1-2 hours, and a duration of approximately 3-5 hours. It is used to control blood sugar levels during meals and is typically administered before or shortly after eating.
- Insulin Glargine: This is a long-acting insulin with a slower onset (about 1-2 hours), no pronounced peak, and a duration of up to 24 hours. It provides a steady release of insulin throughout the day to maintain basal glucose levels.
Given their different onset times, peaks, and durations, insulin lispro and insulin glargine should be drawn up and administered using separate syringes. Mixing different types of insulin, especially long-acting insulins like glargine, with other insulins can alter their efficacy and absorption. Insulin glargine, in particular, should not be mixed with other insulins because its unique formulation ensures a slow and steady release, which can be compromised if mixed.
Let’s address why the other options are incorrect:
- B. “Expect insulin glargine to be cloudy”: Insulin glargine is a clear solution, not cloudy. Cloudy insulin typically refers to intermediate-acting insulins, such as NPH.
- C. “Take an extra dose of insulin lispro prior to aerobic exercise”: Additional insulin doses should not be taken without consulting a healthcare provider. Exercise can affect blood sugar levels, but insulin adjustments should be made based on individual needs and blood glucose monitoring.
- D. “Anticipate that the insulin glargine will peak in 3 hours”: Insulin glargine does not have a pronounced peak. It is designed to provide a steady level of insulin throughout the day, which is different from rapid-acting insulins that have distinct peak times.
In summary, the correct practice is to administer insulin lispro and insulin glargine using separate syringes to avoid compromising their effectiveness and ensure proper glucose management.