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 B
Explanation
A. Internet resources, movies, and television have the most accurate and current information for your adolescent to learn about sexuality issues:
This statement may not be accurate, as the internet, movies, and television can sometimes provide misinformation or biased perspectives. It's crucial to emphasize the importance of reliable and evidence-based sources when adolescents seek information about sexuality.
B. Being honest and straightforward with teenagers will encourage them to ask about subjects like sexuality:
This statement is valuable as it emphasizes open communication. Being honest and straightforward creates an environment where adolescents feel comfortable approaching their caregivers with questions or concerns about sexuality. It promotes trust and a supportive relationship.
C. Most schools have excellent programs to teach adolescents about sex and sexuality:
While some schools do have comprehensive sex education programs, the quality of these programs can vary. Additionally, the involvement of parents and caregivers in discussions about sex and sexuality is essential. Relying solely on school programs may not cover all aspects, and caregivers play a crucial role in reinforcing positive attitudes and values.
D. Teenagers spend so much time with their peers, and that is usually how they find out about sex:
While it's true that peers can influence adolescents, relying solely on peer influence for information about sex may not provide accurate or comprehensive knowledge. Caregivers should aim to create an open and honest dialogue to supplement information from peers and address any misconceptions.
Correct Answer is A
Explanation
A. Epiglottitis:
Epiglottitis is an inflammation of the epiglottis, which can result in rapid onset of symptoms such as severe sore throat, high fever, and difficulty breathing. The characteristic position described, with the child preferring to sit up, lean forward, and keep the mouth open, is known as the "tripod position." This is a protective mechanism to maintain a patent airway.
B. Mild asthma:
Asthma is a chronic respiratory condition characterized by recurrent episodes of wheezing, coughing, and shortness of breath. However, the scenario does not describe typical asthma symptoms, and the child's preference for sitting up and leaning forward is more indicative of an airway obstruction.
C. Spasmodic laryngitis:
Spasmodic laryngitis is characterized by sudden episodes of severe respiratory distress, a barking cough, and sometimes stridor. It often occurs at night and is usually not associated with high fever. The child's behavior in the scenario, particularly the preference for sitting up and leaning forward, is not a common feature of spasmodic laryngitis.
D. Acute laryngotracheobronchitis:
Acute laryngotracheobronchitis, or croup, typically presents with a barking cough, stridor, and respiratory distress. It does not usually cause the preference for sitting up and leaning forward as described in the scenario. Croup is more commonly associated with a distinctive cough sound.

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