A pediatric client weighing 35.2 pounds is prescribed cefdinir 14\text{ mg/kg/day} orally,… — NCLEX-PN

A pediatric client weighing $35.2$ pounds is prescribed cefdinir $14\text{ mg/kg/day}$ orally, to be administered in two equally divided doses. The medication is supplied as a powder for oral suspension. The bottle instructions state: "Add $38\text{ mL}$ of purified water in two portions to yield $60\text{ mL}$ of suspension with a concentration of $125\text{ mg}/5\text{ mL}$ ." After correctly reconstituting the medication, how many mL should the practical nurse administer for a single dose? Record the answer to the nearest tenth. Do not include units in the answer.

Cevap: 4.5 mL

Cevap

4.5

To administer the correct dose, the practical nurse must systematically follow dosage calculation steps. First, the child's weight is converted to kilograms (

35.2 \div 2.2 = 16\text{ kg}

). Then, the total daily dose is calculated by multiplying the weight by the order (

16 \times 14 = 224\text{ mg/day}

). Because the medication is divided into two doses, the single dose is

112\text{ mg}

. Finally, the nurse uses the final reconstituted concentration of

125\text{ mg}/5\text{ mL}

to find the volume:

(112 \div 125) \times 5 = 4.48\text{ mL}

, which rounds to

4.5

. The instructions regarding

38\text{ mL}

and

60\text{ mL}

are necessary for pharmacy preparation but act as distractors during dose calculation.

Adım Adım Çözüm

Convert the client's weight from pounds to kilograms.

16\text{ kg}

The prescribed medication dosage is based on kilograms (

14\text{ mg/kg/day}

Calculate the total daily dose in milligrams.

224\text{ mg/day}

Multiply the child's weight in kg (

16\text{ kg}

) by the daily dosage rate (

14\text{ mg/kg/day}

Determine the amount of medication needed for a single dose.

112\text{ mg/dose}

The prescription states the medication is to be administered in two equally divided doses (

224\text{ mg} \div 2

Calculate the volume of liquid needed for one dose.

4.48\text{ mL}

Using the concentration of the reconstituted suspension (

125\text{ mg}

5\text{ mL}

), use dimensional analysis or the desired/have formula:

\frac{112\text{ mg}}{125\text{ mg}} \times 5\text{ mL}

Round the final calculated volume to the nearest tenth.

4.5

The question instructions explicitly require rounding the final answer to the nearest tenth.

Anahtar Kavram

Weight-based pediatric dosage calculation and reconstitution

Soru

Cevap

Adım Adım Çözüm

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