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The healthcare provider prescribes penicillin 200,000 units intramuscularly for a patient with pneumonia.

The available vial is labeled “Penicillin 500,000 units/mL”. How much penicillin should be administered to the patient? (Enter numerical value only.

If rounding is required, round to the nearest tenth.)
Answer and Explanation

The Correct Answer is ["0.4"]

Step 1 is to determine the amount of penicillin in each milliliter (mL) of the available solution. The vial is labeled as “Penicillin 500,000 units/mL”.

Step 2 is to divide the prescribed dose by the concentration per mL. So, the calculation is 200,000 units ÷ 500,000 units/mL. The result is 0.4 mL.


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Related Questions

Correct Answer is A

Explanation

Choice A rationale
Taking prescribed cortisone accurately is the most important instruction for a client diagnosed with Addison’s disease. Cortisone is a type of glucocorticoid replacement therapy that helps to manage the symptoms of Addison’s disease and prevent adrenal crisis, a life-threatening condition characterized by acute insufficiency of adrenal hormones.
Choice B rationale
Using a walker when weakness occurs may be helpful for some clients with Addison’s disease, as muscle weakness is a common symptom. However, it is not the most important instruction. The primary treatment for Addison’s disease is hormone replacement therapy, which should help to alleviate symptoms such as muscle weakness.
Choice C rationale
Avoiding extreme environmental temperatures can be beneficial for individuals with Addison’s disease, as they may have difficulty regulating body temperature due to cortisol deficiency.
However, this is not the most important instruction. The cornerstone of managing Addison’s disease is hormone replacement therapy.
Choice D rationale
Increasing daily intake of sodium in the diet can be beneficial for some individuals with Addison’s disease, particularly during periods of gastrointestinal illness or intense physical activity. However, this is not the most important instruction. The primary treatment for Addison’s disease is hormone replacement therapy.

Correct Answer is ["42"]

Explanation

Step 1: Convert the volume from liters to milliliters. 1 liter = 1000 mL. Step 2: Convert the time from hours to minutes. 4 hours = 240 minutes.

Step 3: Calculate the rate in mL per minute. Rate = Volume ÷ Time = 1000 mL ÷ 240 min = 4.17 mL/min.

Step 4: Calculate the drops per minute. Drops per minute = Rate × Drop factor = 4.17 mL/min

× 10 gtt/mL = 41.7 gtt/min.

Step 5: Round off the result to the nearest whole number. 41.7 gtt/min rounds off to 42 gtt/min.

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