During a pediatric clinic visit, a child weighing 37.4\text{ lb} is diagnosed with acute o… — NCLEX-PN

During a pediatric clinic visit, a child weighing $37.4\text{ lb}$ is diagnosed with acute otitis media. The primary health care provider prescribes cefdinir oral suspension at the maximum recommended dosage of $14\text{ mg/kg/day}$ , to be administered in equally divided doses every $12\text{ hours}$ . The clinic pharmacy dispenses a multi-dose bottle of cefdinir powder with the following label instructions: "Reconstitute by adding $38\text{ mL}$ of sterile water to yield $60\text{ mL}$ of oral suspension with a concentration of $250\text{ mg}/5\text{ mL}$ ."

The practical nurse is reinforcing medication administration instructions with the child's parents. How many milliliters ( $\text{mL}$ ) should the nurse instruct the parents to administer for a single dose? (Record the answer to the nearest tenth. Do not include units in the answer.)

Cevap: 2.4

Cevap

2.4

To solve this, first convert pounds to kilograms:

37.4\text{ lb} \div 2.2 = 17\text{ kg}

. Next, find the total daily dose:

17\text{ kg} \times 14\text{ mg/kg/day} = 238\text{ mg/day}

. Because it is given every 12 hours, divide by 2:

238 \div 2 = 119\text{ mg/dose}

. Using the concentration of

250\text{ mg}

5\text{ mL}

, calculate the volume:

(119\text{ mg} \div 250\text{ mg}) \times 5\text{ mL} = 2.38\text{ mL}

. Finally, round to the nearest tenth to get

2.4

Adım Adım Çözüm

Convert the client's weight from pounds to kilograms.

37.4\text{ lb} \div 2.2\text{ lb/kg} = 17\text{ kg}

Weight-based pediatric dosages require the weight to be in kilograms.

Calculate the total daily medication dosage.

17\text{ kg} \times 14\text{ mg/kg/day} = 238\text{ mg/day}

The prescription is written as a daily total based on the child's weight.

Calculate the single dose amount.

238\text{ mg/day} \div 2\text{ doses/day} = 119\text{ mg/dose}

The medication is ordered every 12 hours, meaning the total daily amount must be divided into 2 equal doses.

Calculate the volume to administer for one dose using the final concentration.

\frac{119\text{ mg}}{250\text{ mg}} \times 5\text{ mL} = 2.38\text{ mL}

The concentration is

250\text{ mg}

per

5\text{ mL}

. The reconstitution water volume (

38\text{ mL}

) and total yield (

60\text{ mL}

) are distractors and not used in the formula.

Round the calculated volume to the nearest tenth as instructed.

2.38

rounds to

2.4

Standard rounding rules state that if the hundredths digit is 5 or greater, round up the tenths digit.

Anahtar Kavram

Advanced Pediatric Dosage Calculation and Reconstitution Interpretation

Soru

Cevap

Adım Adım Çözüm

Anahtar Kavram

Sık Yapılan Hatalar

Konular

Bu konudan daha fazla soru