Order: Ceftriaxone 300 mg IV Q12H for a 6 month old infant with a serious infection who weighs 18 lbs. The recommended dosage is 50-75 mg/kg/day in divided doses BID. Prove mathematically (mg/kg/day) the ordered dose and is it safe to give Safe/Unsafe)?
The Correct Answer is ["612.375"]
To calculate the ordered dose of Ceftriaxone in mg/kg/day, we can follow these steps:
Convert the weight to kg:
Weight in kg= Weight in lbs /2.2046
Weight in kg= 18lbs/2.2046≈8.165 kg
Calculate the daily dosage range:
Using the recommended dosage range of 50-75 mg/kg/day:
Minimum daily dosage= 50mg/kg/day × Weight in kg
Maximum daily dosage =75mg/kg/day×Weight in kg
Calculate the ordered dose:
Ordered dose=Dosage per administration × Frequency per day
Ordered dose= 300mg×2times per day= 600mg/day
Now, let's calculate the daily dosage range:
Minimum daily dosage=50mg/kg/day×8.165kg=408.25mg/day
Maximum daily dosage=75mg/kg/day×8.165kg=612.375mg/day
The ordered dose of 600 mg/day falls within the calculated range of 408.25-612.375 mg/day, so the ordered dose is within the recommended dosage range for a serious infection.
Therefore, the ordered dose of Ceftriaxone 300 mg IV Q12H for a 6-month-old infant weighing 18 lbs is considered safe based on the calculated dosage range.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Pertussis:
Pertussis, commonly known as whooping cough, is caused by the bacterium Bordetella pertussis. It is characterized by a persistent cough with a distinctive "whoop" sound during the inspiratory phase. The cough can be severe and may last for several weeks. The characteristic whooping sound is due to the rapid intake of breath after a coughing episode.
B. Asthma:
Asthma is a chronic respiratory condition characterized by recurrent episodes of wheezing, coughing, and shortness of breath. It is not typically associated with a whooping sound during the inspiratory phase. Asthma symptoms are often triggered by factors such as allergies, exercise, or exposure to irritants.
C. Bronchiolitis:
Bronchiolitis is commonly caused by respiratory syncytial virus (RSV), especially in infants. It presents with symptoms such as cough, wheezing, and respiratory distress. However, it does not involve the characteristic whooping cough sound seen in pertussis.
D. Acute Laryngotracheobronchitis (LTB):
Acute Laryngotracheobronchitis, or croup, is characterized by a barking cough, stridor (a high-pitched sound during inhalation), and respiratory distress. It is common in young children and is often caused by viruses. Unlike pertussis, it does not typically include the distinctive whooping sound.
Correct Answer is B
Explanation
A. Teaching the child to take long, slow breaths:
While teaching slow breathing techniques can be helpful in managing anxiety and promoting a sense of calm, it may not directly address the underlying airway inflammation and bronchodilation needed in acute laryngotracheobronchitis.
B. Assisting with racemic epinephrine nebulizer therapy:
Racemic epinephrine is a medication that contains epinephrine, a bronchodilator. Nebulizer therapy with racemic epinephrine helps reduce airway inflammation, allowing for bronchodilation and improved breathing. This is a common intervention for managing acute respiratory distress in conditions like croup.
C. Administering an oral analgesic:
Oral analgesics, such as pain medications, can provide relief from discomfort or pain, but they do not directly address the bronchodilation needed for conditions like acute laryngotracheobronchitis.
D. Administering a corticosteroid:
Corticosteroids have anti-inflammatory properties and can help reduce swelling and inflammation in the airways. By doing so, they contribute to bronchodilation and improved breathing in conditions like croup. Corticosteroids are often used as part of the treatment plan for acute laryngotracheobronchitis.
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