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Zorluk: ZorPharmacological Therapies

A practical nurse is preparing to administer clindamycin to a pediatric client who weighs 24.2 lb24.2\text{ lb}. The healthcare provider prescribes clindamycin 15 mg/kg/day15\text{ mg/kg/day} intramuscularly (IM) divided into equal doses every 8 hours8\text{ hours}. The medication is supplied in a vial labeled 300 mg/2 mL300\text{ mg}/2\text{ mL}. How many mL will the practical nurse administer per dose? (Record the answer to the nearest tenth. Do not include units in your answer.)

Cevap: 0.4 mL

Cevap

0.4
The correct dose is calculated by sequentially converting weight to kilograms, finding the total daily dose, dividing by the administration frequency, and calculating the volume using the provided medication concentration. The resulting 0.366... mL0.366...\text{ mL} rounds to 0.4 mL0.4\text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
24.2÷2.2=11 kg24.2 \div 2.2 = 11\text{ kg}
The prescribed medication dosage is weight-based in kg, so the weight must be converted from pounds to kilograms.
2
Calculate the total daily dosage required.
11 kg×15 mg/kg=165 mg/day11\text{ kg} \times 15\text{ mg/kg} = 165\text{ mg/day}
Multiplying the client's weight in kg by the prescribed mg/kg/day provides the total amount of medication needed for 24 hours.
3
Determine the dose to be administered every 8 hours.
165 mg÷3=55 mg/dose165\text{ mg} \div 3 = 55\text{ mg/dose}
Medication ordered every 8 hours is given 3 times a day (24 / 8 = 3). Dividing the total daily dose by 3 gives the single dose amount.
4
Calculate the volume (mL) needed for the single dose.
55 mg×2 mL300 mg=0.3666... mL55\text{ mg} \times \frac{2\text{ mL}}{300\text{ mg}} = 0.3666...\text{ mL}
Using the formula (Desired / Have) x Volume, the needed dose is divided by the supplied concentration and multiplied by the supplied volume.
5
Round the final volume to the nearest tenth.
0.4 mL0.4\text{ mL}
Standard nursing administration and syringe measurement rules typically require rounding volumes less than 1 mL to the nearest hundredth or tenth depending on the syringe, but the prompt explicitly requested rounding to the nearest tenth.

Anahtar Kavram

Pediatric weight-based dosage calculation and parenteral volume computation
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