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 B
Explanation
Choice A rationale:
Shaking the insulin vial vigorously is not recommended. It can lead to the formation of bubbles, which can affect the accuracy of the dose. Instead, insulin vials should be gently rolled between the hands to mix.
Choice B rationale:
Injecting insulin into the abdominal area is indeed a recommended practice. The abdomen is a preferred site for insulin injection because it has a faster absorption rate compared to other areas. This can help to more effectively regulate blood glucose levels.
Choice C rationale:
Exercise typically lowers blood glucose levels, so insulin doses may need to be reduced to prevent hypoglycemia. Clients should monitor their blood glucose closely and adjust insulin as directed by their healthcare provider.
Choice D rationale:
Freezing unopened insulin vials is not advised. Freezing can disrupt the insulin structure, rendering it ineffective. Insulin should be stored in a refrigerator at a temperature between 2°C and 8°C (36°F and 46°F). Once opened, it can be kept at room temperature for up to 28 days.
Correct Answer is D
Explanation
Choice A rationale:
Bounding peripheral pulses are not typically associated with diabetes insipidus. Diabetes insipidus is a condition characterized by excessive thirst and excretion of large amounts of severely dilute urine.
Choice B rationale:
Moist mucous membranes are not a common finding in diabetes insipidus. In fact, due to excessive urination, patients may experience dehydration which can lead to dry mucous membranes.
Choice C rationale:
Bradycardia, or a slower than normal heart rate, is not a typical symptom of diabetes insipidus. The condition does not directly affect the heart rate.
Choice D rationale:
Decreased urine specific gravity is a key finding in diabetes insipidus. The condition causes an imbalance of water in the body, leading to the production of large amounts of dilute (or low specific gravity) urine.
Please note that these rationales are based on general knowledge about diabetes insipidus and the specific symptoms mentioned in the choices. For a more detailed understanding, it’s recommended to refer to medical textbooks or consult with healthcare professionals.
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