A patient is prescribed 30 units of insulin glargine and 10 units of insulin lispro before breakfast. How should the nurse prepare the insulin for administration?
Administer insulin glargine and insulin lispro separately using two different syringes.
Mix both insulins in a single syringe after warming them to room temperature.
Draw up insulin lispro first, then insulin glargine into the same syringe.
Draw up insulin glargine first, then insulin lispro into the same syringe.
The Correct Answer is A
A. Administer insulin glargine and insulin lispro separately using two different syringes: Insulin glargine is a long-acting insulin that should never be mixed with other insulins, including rapid-acting insulins like lispro. Administering them separately ensures accurate dosing and maintains the intended pharmacokinetic profiles of both insulins.
B. Mix both insulins in a single syringe after warming them to room temperature: Mixing insulin glargine with lispro can alter the absorption and effectiveness of glargine, potentially leading to unpredictable blood glucose control. Warming to room temperature does not prevent this interaction.
C. Draw up insulin lispro first, then insulin glargine into the same syringe: Even if lispro is drawn first, mixing it with glargine in one syringe is unsafe. The chemical properties of glargine prevent it from being combined with other insulins without affecting its basal action.
D. Draw up insulin glargine first, then insulin lispro into the same syringe: Drawing glargine first does not make it safe to mix with lispro. Glargine must always be administered separately to maintain its long-acting effect and avoid dosing errors or hypoglycemia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Total Volume: 500 mL
Infusion Time: 4 hours (240 minutes)
Drop Factor: 20 gtt/mL
- Calculate the infusion rate in drops per minute
Infusion Rate (gtt/min) = (Total Volume × Drop Factor) ÷ Time (min)
Infusion Rate = (500 × 20) ÷ 240
Infusion Rate = 10,000 ÷ 240
Infusion Rate = 41.67 gtt/min
- Round to the nearest whole number
Infusion Rate = 42 gtt/min
Correct Answer is A
Explanation
A. 30 mL: One fluid ounce is equivalent to approximately 29.6 mL, which is commonly rounded to 30 mL for safe and practical medication calculations. This standard conversion is widely used in nursing practice.
B. 60 mL: Sixty milliliters equals 2 ounces, not 1 ounce. Using this value would result in administering double the intended volume.
C. 120 mL: One hundred twenty milliliters equals 4 ounces. This conversion is significantly higher than the correct amount and would lead to a major dosing error.
D. 15 mL: Fifteen milliliters equals 0.5 ounce or 1 tablespoon. This value is too small to represent 1 ounce and would result in underdosing.
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