A nurse is preparing to administer digoxin at a dosage of 8 mcg/kg/day orally, divided equally every 12 hours, to a preschooler who weighs 33 lbs. Digoxin elixir is available at a concentration of 0.05 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["1.2"]
- Step 1: Identify the child's weight in pounds. The child weighs 33 lbs.
- Step 2: Convert the child's weight from pounds to kilograms. We know that 1 kg = 2.2 lbs. So, 33 lbs = 33 ÷ 2.2 kg. Calculating the division gives us approximately 15 kg.
- Step 3: Identify the prescribed dose in mcg/kg/day. The child is scheduled to receive 8 mcg/kg/day of digoxin, divided equally every 12 hours.
- Step 4: Calculate the total daily dose in mcg. We can do this by multiplying the child's weight in kg by the prescribed dose in mcg/kg:
- Total daily dose = 8 mcg/kg/day × 15 kg.
- Calculating the multiplication gives us: Total daily dose = 120 mcg/day.
- Step 5: Since the dose is divided equally every 12 hours, we divide the total daily dose by 2 to get the dose per administration:
- Dose per administration = Total daily dose ÷ 2.
- Dose per administration = 120 mcg ÷ 2.
- Calculating the division gives us: Dose per administration = 60 mcg.
- Step 6: Identify the concentration of the available solution. The available solution contains 0.05 mg/mL of digoxin. Convert this to mcg/mL for consistency with the dose per administration. We know that 1 mg = 1000 mcg. So, 0.05 mg = 0.05 × 1000 mcg = 50 mcg/mL.
- Step 7: Calculate the volume of solution needed to deliver the required dose. We can set up a proportion to solve for this:
- 50 mcg is to 1 mL as 60 mcg is to X mL.
- In other words, 50 mcg : 1 mL = 60 mcg : X mL.
- Step 8: Solve for X using cross-multiplication and division:
- Cross-multiplication gives us: 50 mcg × X mL = 60 mcg × 1 mL.
- Simplifying this gives us: 50X = 60.
- Dividing both sides by 50 gives us: X = 60 ÷ 50.
- Calculating the division gives us: X = 1.2.
Administer 1.2 mL of the digoxin elixir per dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason:Placing the client in a sitting position helps to lower blood pressure by promoting venous return and is the first action to take in cases of autonomic dysreflexia²³.
Choice B reason:While examining for skin breakdown is important, it is not the first action to take when autonomic dysreflexia is suspected.
Choice C reason:Checking the bladder for distention is a critical step, but it should be done after positioning the client to address immediate blood pressure concerns.
Choice D reason:Checking for fecal impaction is also important but follows the initial step of positioning the client to manage blood pressure.
Correct Answer is B
Explanation
Choice A reason: A BUN level of 8 mg/dL and creatinine level of 0.7 mg/dL are within normal ranges and would not be expected in a client with CKD².
Choice B reason: Elevated BUN and creatinine levels, such as 45 mg/dL and 8 mg/dL respectively, are indicative of impaired kidney function, which is consistent with CKD².
Choice C reason: A BUN level of 10 mg/dL and creatinine level of 0.3 mg/dL are lower than the expected values for a client with CKD, indicating better kidney function than typically seen in CKD².
Choice D reason: A BUN level of 23 mg/dL and creatinine level of 1.0 mg/dL may be slightly elevated but are not as indicative of CKD as the values in choice B².
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