The physician orders an injection of dexamethasone (Decadron) 6mg IM for a patient.
The available stock is dexamethasone 4mg/1ml in a 5ml multidose vial.
How many mLs of this medication will the nurse prepare?
75 mLs
5 mLs
6 mLs
15 mLs
The Correct Answer is C
The correct answer is Choice C.
Let’s go through the calculation step by step:
Step 1: Identify the order and the available medication. The order is for dexamethasone (Decadron) 6mg IM. The available stock is dexamethasone 4mg/1ml in a 5ml multidose vial.
Step 2: Determine the amount of medication needed to fulfill the order. This is done by dividing the ordered amount by the concentration of the available medication.
So, we have:
Step 2 Calculation=Concentration of Available MedicationOrdered Amount Substituting the given values: Step 2 Calculation=4 mg/mL6 mg Step 3: Perform the calculation.
Step 3 Calculation=1.5 mL
So, the nurse will prepare 1.5 mL of this medication.
Now, let’s discuss the rationales for each choice:
Choice A rationale:
75 mLs is not the correct amount. This would be a significantly larger dose than ordered, which could lead to an overdose.
Choice B rationale:
5 mLs is not the correct amount. This would also be a larger dose than ordered, which could lead to an overdose.
Choice C rationale:
1.5 mLs is the correct amount. This is calculated by dividing the ordered dose (6 mg) by the concentration of the available medication (4 mg/mL).
Choice D rationale:
15 mLs is not the correct amount. This would be a significantly larger dose than ordered, which could lead to an overdose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Insulin is not absorbed most rapidly when injected in the thigh. The abdomen is actually the preferred site for insulin injection as insulin is absorbed more quickly and predictably there. The thigh is a simple area for self-injection, but regular injections in the thigh can sometimes cause discomfort when walking or running afterward.
Choice B rationale:
Using cold insulin for injection to minimize site pain is not recommended. Insulin should be at room temperature. Cold insulin might make the injection more painful.
Choice C rationale:
Massaging the site after injection to promote absorption is not advised. It can cause the insulin to be absorbed too quickly which can lead to low blood glucose levels.
Choice D rationale:
Rotating the injection site to keep insulin levels consistent is the correct choice. People who take insulin daily should rotate their injection sites. This is important because using the same spot over time can cause lipodystrophy. In this condition, fat either breaks down or builds up under the skin, causing lumps or indentations that interfere with insulin absorption.
Correct Answer is D
Explanation
Choice A rationale:
Acyclovir is an antiviral medication used to treat infections caused by certain types of viruses. It is primarily used for the treatment of herpes simplex virus infections, chickenpox, and shingles. However, it is not typically used as an anti-HIV drug.
Choice B rationale:
Ribavirin is an antiviral medication used to treat hepatitis C and certain other viral infections. While it has broad-spectrum antiviral activity, it is not specifically used to prevent mother-to-child transmission of HIV.
Choice C rationale:
Foscarnet is an antiviral medication used to treat or prevent cytomegalovirus (CMV) retinitis in individuals with AIDS. It is also used to treat cold sores and genital herpes. However, it is not the first-line choice for preventing mother-to-child transmission of HIV.
Choice D rationale:
Zidovudine, also known as AZT, is an antiretroviral medication used to prevent and treat HIV/AIDS. It is generally safe for use during pregnancy and is commonly used to prevent mother-to-child transmission of HIV12. It works by inhibiting the reverse transcriptase enzyme, thereby blocking viral replication. The use of Zidovudine and other antiretroviral drugs in pregnant women with HIV has significantly reduced the rate of mother-to-child transmission of the virus.
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