A nurse is preparing to administer digoxin 8mcg/kg/day PO to divide equally every 12hr for a preschooler who weighs 33lb. Available is digoxin elixir 0.05mg/mL. How many mL should the nurse administer per dose? Round off to the nearest tenth. Use a leading zero. Do not use a trailing zero.
The Correct Answer is ["1.2"]
Let's calculate the dosage step-by-step:
1. Convert pounds to kilograms:
33 lbs x 0.453592 kg/lb ≈ 14.97 kg
2. Calculate the total daily dosage:
8 mcg/kg/day x 14.97 kg ≈ 119.76 mcg/day
3. Calculate the dosage per dose (divided equally every 12 hours):
119.76 mcg/day / 2 doses ≈ 59.88 mcg/dose
4. Convert micrograms to milligrams:
59.88 mcg = 0.05988 mg
5. Calculate the volume needed from the elixir:
0.05988 mg / 0.05 mg/mL ≈ 1.2 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.5"]
Explanation
Step 1: Determine the ratio of milligrams per tablet from the available tablets.
The available tablets are labelled "100 mg/tablet." This means that for every 1 tablet, there are 100 milligrams of desipramine.
Step 2: Calculate the number of tablets needed for 150 milligrams.
We can set up a proportion to solve for the unknown number of tablets:
(100 mg) / (1 tablet) = (150 mg) / (x tablets)
Cross-multiplying:
100 mg x x tablets = 1 tablet x 150 mg
Step 3: Solve for x (the number of tablets).
Divide both sides of the equation by 100 mg:
x tablets = (1 tablet x 150 mg) / (100 mg)
x tablets = 1.5 tablets
Correct Answer is B
Explanation
A) The nurse administers the prescribed dosage: Administering the prescribed dosage of 100 mg every 8 hours might seem appropriate at first glance, but it is crucial to evaluate whether this dosage falls within the recommended dosage range based on the child’s weight. Without checking the dosage range, there could be a risk of underdosing or overdosing.
B) The nurse determines the prescription is insufficient to achieve the desired effect: To evaluate this, calculate the total daily dosage based on the prescribed regimen and compare it to the recommended range. For a toddler weighing 20 kg, the recommended daily dosage range is 20 to 25 mg/kg/day. This equates to 400 mg to 500 mg per day (20 kg x 20 mg = 400 mg; 20 kg x 25 mg = 500 mg). The prescribed dosage is 100 mg every 8 hours, which totals 300 mg per day (100 mg x 3 doses). Therefore, the prescribed dosage falls below the recommended range, making it insufficient to achieve the desired therapeutic effect.
C) The nurse determines the prescription is above the recommended dosage range: This option is incorrect as the calculated daily dose of 300 mg is actually below the recommended range of 400 to 500 mg per day. Therefore, the prescription does not exceed the recommended dosage.
D) The nurse contacts the pharmacist to adjust the prescribed dosage: While it is important to contact the pharmacist or healthcare provider when there are concerns about dosage, in this scenario, the primary issue is that the dosage is insufficient rather than an adjustment made by the pharmacist. The nurse should first determine if the dosage falls within the recommended range before deciding to make contact for adjustments.
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