The health care provider orders a trough level of an antibiotic administered every twenty four hours.
When should the nurse plan for a trough level to be drawn?
Every morning at 08:00AM (0800).
Halfway between next scheduled dose.
Just prior to next scheduled dose.
Two hours after a scheduled dose.
The Correct Answer is C
Just prior to the next scheduled dose. A trough level is the lowest concentration of a drug in the blood, and it is measured just before the next dose is due to be administered.
This helps to ensure that the drug level does not fall below the therapeutic range or rise above the toxic range.
Choice A is wrong because every morning at 08:00 AM (0800) is not a consistent time interval for a drug that is administered every twenty-four hours.
The trough level should be measured at the same time before each dose.
Choice B is wrong because halfway between next scheduled dose is not a trough level, but a midpoint level.
This does not reflect the lowest concentration of the drug in the blood.
Choice D is wrong because two hours after a scheduled dose is not a trough level, but a peak level. This is the highest concentration of the drug in the blood, and it is measured after the drug has been absorbed and distributed. Peak levels are no longer routinely recommended for vancomycin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
“I can’t promise that the information won’t be shared if your health or safety is involved.” This response by the nurse would be appropriate because it respects the client’s confidentiality while also acknowledging its limits of it. The nurse has a duty to report any information that may indicate a risk of harm to the client or others.
Choice A is wrong because it dismisses the client’s need to share something and implies that the nurse is not interested or trustworthy.
Choice B is wrong because it gives a false assurance of confidentiality and may lead to ethical dilemmas if the client reveals something that requires reporting.
Choice C is wrong because it does not address the issue of confidentiality and may give the impression that the nurse is trying to avoid the conversation.
Correct Answer is D
Explanation
The question asks how many milligrams of the medication will be in 1 mL of D5W. To find this, we need to know the concentration of the medication in the solution.
Concentration is the amount of medication per unit volume of solution. We can use this formula:
Concentration = Mass / Volume
We know that 250 mg of the medication is diluted in 500 mL of D5W. So we can plug these values into the formula:
Concentration = 250 mg / 500 mL Simplifying, we get:
Concentration = 0.5 mg / mL
This means that there are 0.5 mg of the medication in every 1 mL of D5W. So the answer is
- To check our answer, we can use another formula:
Mass = Concentration x Volume
If we want to find the mass of the medication in 1 mL of D5W, we can multiply the concentration by the volume:
Mass = 0.5 mg / mL x 1 mL Simplifying, we get:
Mass = 0.5 mg
This matches our answer.
The other choices are wrong because they do not use the correct formula or values. Here is why:
Choice A is wrong because it uses the inverse of the concentration (1 / 0.5) instead of the concentration (0.5).
Choice B is wrong because it uses the mass of the medication (250 mg) instead of the concentration (0.5 mg / mL).
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