A healthcare provider prescribes ceftriaxone 50\text{ mg/kg/day} intramuscularly (IM) to b… — NCLEX-PN

A healthcare provider prescribes ceftriaxone $50\text{ mg/kg/day}$ intramuscularly (IM) to be given in two divided doses for a toddler who weighs $26.4\text{ lbs}$ . The pharmacy supplies ceftriaxone as a powder in a vial labeled $1\text{ g}$ . The reconstitution instructions on the vial state: "Add $2.1\text{ mL}$ of sterile water for injection to yield a final concentration of $350\text{ mg/mL}$ ."

How many milliliters ( $\text{mL}$ ) should the practical nurse administer for one dose? Record your answer to the nearest tenth. Do not include units in your answer.

Cevap: 0.9 mL

Cevap

0.9

To determine the correct volume to administer, first convert the weight to kilograms (

26.4\text{ lbs} \div 2.2 = 12\text{ kg}

). Next, calculate the total daily dose by multiplying the weight by the prescribed rate (

12\text{ kg} \times 50\text{ mg/kg} = 600\text{ mg}

). Because the medication is given in two divided doses, divide the total daily dose by 2 (

600\text{ mg} \div 2 = 300\text{ mg}

). Finally, use the reconstituted concentration of

350\text{ mg/mL}

to find the volume: (

300\text{ mg} \div 350\text{ mg/mL} = 0.857...\text{ mL}

). Rounding to the nearest tenth yields

0.9\text{ mL}

Adım Adım Çözüm

Convert the client's weight from pounds to kilograms.

26.4\text{ lbs} \div 2.2\text{ lbs/kg} = 12\text{ kg}

The medication dosage is prescribed based on the client's weight in kilograms.

Calculate the total daily dosage in milligrams.

12\text{ kg} \times 50\text{ mg/kg/day} = 600\text{ mg/day}

This establishes the total amount of medication the toddler needs over a 24-hour period.

Determine the required milligrams for a single dose.

600\text{ mg/day} \div 2\text{ doses} = 300\text{ mg/dose}

The prescription states the medication is to be given in two divided doses per day, and the question asks for the volume of one dose.

Calculate the volume of the medication to administer based on the reconstituted concentration.

300\text{ mg} \div 350\text{ mg/mL} = 0.85714...\text{ mL}

The final concentration yield (

350\text{ mg/mL}

), not the diluent volume, must be used to calculate the physical volume to draw up into the syringe.

Round the final answer to the nearest tenth.

0.9\text{ mL}

The question explicitly asks to record the answer to the nearest tenth.

Anahtar Kavram

Weight-based pediatric dosage calculation and medication reconstitution

Soru

Cevap

Adım Adım Çözüm

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