The nurse has an order to administer U-500 Humulin R insulin 10 units. How many units should the nurse draw up when administering this insulin?
50 units of Humulin R insulin in a 100-unit insulin syringe.
10 units of Humulin R insulin in a 500-unit insulin syringe.
10 units of Humulin R insulin in a 30-unit insulin syringe.
50 units of Humulin R insulin in a 50-unit insulin syringe.
The Correct Answer is B
The correct answer is B. 10 units of Humulin R insulin in a 500-unit insulin syringe.
Choice A rationale: This choice is incorrect because a 100-unit syringe would not be able to hold enough U-500 insulin (5 times more concentrated) to deliver the prescribed 10 units. Using a 100-unit syringe could lead to an inaccurate dose.
Choice B rationale: This choice is correct. U-500 Humulin R insulin is a concentrated form containing 5 times more insulin per milliliter compared to U-100 insulin. Therefore, a 500-unit syringe is appropriate to measure the prescribed 10 units accurately.
Choice C rationale: This choice is incorrect. A 30-unit syringe would not have the capacity to hold even the 10 units of U-500 insulin. It would be impossible to draw up the correct dose with this syringe size.
Choice D rationale: This choice is incorrect. Similar to choice A, a 50-unit syringe is not suitable for U-500 insulin due to its limited capacity. It would lead to an inaccurate measurement of the 10-unit dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
While it’s true that some people with tuberculosis (TB) may not have symptoms (a condition known as latent TB), many people with active TB do have symptoms. Symptoms can include a cough that lasts more than three weeks, pain in the chest, and coughing up blood or sputum.
Choice B rationale
Antituberculosis drugs are indeed used extensively for treating active TB disease. However, they are also used in some cases for prevention, such as in people who have been exposed to TB or who have latent TB4.
Choice C rationale
Treatment for TB usually requires a much longer period than treatment for most other infections. TB treatment can take from 6 to 9 months or even longer, especially for drug- resistant TB45.
Choice D rationale
Mycobacteria, the bacteria that cause TB, do have a cell wall that is resistant to penetration by many anti-infective drugs. This is one reason why TB requires a long treatment period with a combination of drugs.
Correct Answer is B
Explanation
Choice A rationale
Nicotine is a stimulant and can increase heart rate and blood pressure. However, it does not specifically interact with barbiturates.
Choice B rationale
Alcohol should be avoided when taking barbiturates. Both alcohol and barbiturates are CNS depressants, and using them together can lead to additive effects, increasing the risk of sedation and respiratory depression.
Choice C rationale
There is no specific interaction between bananas and barbiturates.
Choice D rationale
Caffeine is a stimulant and can counteract the sedative effects of barbiturates. However, moderate caffeine consumption is usually considered safe.
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