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Zorluk: OrtaPharmacological Therapies

A toddler weighing 33 lbs33\text{ lbs} is diagnosed with acute otitis media. The healthcare provider prescribes cefdinir 14 mg/kg/day14\text{ mg/kg/day} orally in two divided doses. The pharmacy dispenses cefdinir oral suspension with a concentration of 125 mg/5 mL125\text{ mg}/5\text{ mL}. How many milliliters (mL\text{mL}) should be administered per dose?

Record your answer to the nearest tenth. Do not include units in your answer.

Cevap: 4.2 mL

Cevap

4.2
To safely administer this weight-based medication, the practical nurse must first convert the child's weight to kilograms (33 lbs÷2.2 lbs/kg=15 kg33\text{ lbs} \div 2.2\text{ lbs/kg} = 15\text{ kg}). Next, the total daily dose is calculated by multiplying the weight in kilograms by the prescribed rate (15 kg×14 mg/kg/day=210 mg/day15\text{ kg} \times 14\text{ mg/kg/day} = 210\text{ mg/day}). Because the prescription specifies two divided doses, the daily dose is halved to find the single administration amount (210 mg÷2=105 mg/dose210\text{ mg} \div 2 = 105\text{ mg/dose}). Finally, the required volume is determined using the dispensed concentration of 125 mg/5 mL125\text{ mg}/5\text{ mL}. Using the formula DesiredHave×Quantity\frac{\text{Desired}}{\text{Have}} \times \text{Quantity}: 105 mg125 mg×5 mL=0.84×5 mL=4.2 mL\frac{105\text{ mg}}{125\text{ mg}} \times 5\text{ mL} = 0.84 \times 5\text{ mL} = 4.2\text{ mL}.

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
15 kg15\text{ kg}
Weight-based medication prescribing requires the client's weight to be accurately calculated in kilograms (33 lbs÷2.2=15 kg33\text{ lbs} \div 2.2 = 15\text{ kg}).
2
Calculate the total daily dose of the medication.
210 mg/day210\text{ mg/day}
The prescription is ordered based on the total amount needed for a full 24-hour period (15 kg×14 mg/kg/day15\text{ kg} \times 14\text{ mg/kg/day}).
3
Determine the amount of medication required for a single dose.
105 mg/dose105\text{ mg/dose}
The total daily dose must be divided into two equal doses as prescribed (210 mg÷2210\text{ mg} \div 2).
4
Calculate the liquid volume to administer per dose using the available concentration.
4.2 mL4.2\text{ mL}
Using the formula (Desired / Have) ×\times Quantity: (105 mg125 mg)×5 mL=4.2 mL\frac{105\text{ mg}}{125\text{ mg}}) \times 5\text{ mL} = 4.2\text{ mL}.

Anahtar Kavram

Weight-Based Pediatric Dosage Calculation
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Konular

Pharmacological Therapies

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