A nurse is teaching a client how to draw up regular insulin and NPH insulin in the same syringe. Which of the following instructions should the nurse include?
Inject air into the regular insulin first.
Shake the NPH insulin until it is well mixed.
Draw up the NPH insulin into the syringe first.
Discard regular insulin that appears cloudy.
The Correct Answer is D
Choice A reason: This is incorrect. When mixing regular (clear) and NPH (cloudy) insulin, air should be injected into the NPH vial first, then into the regular insulin vial. This prevents contamination of the regular insulin with NPH insulin.
Choice B reason: This is incorrect because the nurse should not shake the NPH insulin vial, but rather roll it gently between the palms to mix it. Shaking can cause bubbles and affect the accuracy of the dose.
Choice C reason: This is incorrect because the nurse should draw up the regular insulin into the syringe first, then the NPH insulin. This prevents mixing of the NPH insulin with the regular insulin in the vial.
Choice D reason: This is correct. Regular insulin should always be clear. If it appears cloudy, it may be contaminated or expired and should be discarded.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: This is incorrect because the patient may not see a response from the medication for at least six months. The patient should continue taking the medication as prescribed and follow up with the provider regularly.
Choice B reason: This is correct because finasteride can cause birth defects in male fetuses if it is absorbed through the skin or ingested by pregnant women. The patient should wear gloves when handling the tablets and avoid contact with crushed or broken tablets.
Choice C reason: This is incorrect because PSA levels will decrease while taking this medication. PSA stands for prostate-specific antigen, which is a marker for prostate cancer. The patient should inform the provider that they are taking finasteride before having a PSA test, as it may affect the results.
Choice D reason: This is incorrect because grapefruit juice does not interact with finasteride. However, the patient should avoid alcohol and other medications that may affect the liver while taking finasteride.

Correct Answer is C
Explanation
Choice A reason: Vaginal cultures are not necessary for oral contraceptive therapy. They are used to diagnose infections such as bacterial vaginosis, yeast infection, or sexually transmitted diseases.
Choice B reason: Complete blood count is not essential for oral contraceptive therapy. It is used to measure the number and types of blood cells, such as red blood cells, white blood cells, and platelets.
Choice C reason: Serum potassium level is the most important laboratory test for oral contraceptive therapy. This is because some oral contraceptives can increase the risk of hyperkalemia, which is a high level of potassium in the blood. Hyperkalemia can cause serious complications such as cardiac arrhythmias, muscle weakness, and paralysis.
Choice D reason: Pregnancy test is not a laboratory test, but a urine test. It is important to rule out pregnancy before starting oral contraceptive therapy, but it is not the most important test for the nurse to assess.
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