Question

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a nurse is preparing to administer digoxin 8 mcg/kg/day po to divide equally every 12 hr for a preschooler who weighs 33 lb. available is digoxin elixir 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.)

Explanation:

Step1: Convert pounds to kilograms

Since \(1\ lb = 0.454\ kg\), for a weight of \(33\ lb\), the weight in kilograms is \(33\times0.454 = 14.982\ kg\).

Step2: Calculate the daily dose

The dose is \(8\ mcg/kg/day\). So the daily dose is \(14.982\times8=119.856\ mcg\).

Step3: Convert daily dose to milligrams

Since \(1\ mg = 1000\ mcg\), the daily dose in milligrams is \(119.856\div1000 = 0.119856\ mg\).

Step4: Calculate the dose per 12 - hour (half - day)

The dose per \(12\) hours is \(0.119856\div2=0.059928\ mg\).

Step5: Calculate the volume per dose

The elixir is \(0.05\ mg/mL\). Using the formula \(V=\frac{D}{C}\) (where \(V\) is volume, \(D\) is dose, \(C\) is concentration), \(V=\frac{0.059928}{0.05}=1.19856\approx0.2\ mL\).

Answer:

$0.2$