A 4-year-old child who weighs 44 lbs is diagnosed with Streptococcal Pharyngitis and is prescribed Penicillin. 40 mg/kg/day, twice a day for 10 days. The suspension is written as 400 mg/5 ml. Calculate one dose in mg.
400 mg.
800 mg.
1200 mg.
1600 mg.
The Correct Answer is A
Choice A rationale:
The dosage prescribed for the child is 40 mg/kg/day, twice a day for 10 days. The child weighs 44 lbs, which is approximately 20 kg (1 lb = 0.45 kg). Therefore, the total daily dosage would be 40 mg/kg * 20 kg = 800 mg. This is split into two doses, so each dose would be 400 mg, not 400 mg per 5 ml as in the suspension.
Choice B rationale:
As explained above, the total daily dosage is 800 mg, split into two doses of 400 mg each. The suspension is written as 400 mg/5 ml, so one dose would be 400 mg.
Choice C rationale:
This choice is incorrect because it does not accurately calculate the dosage based on the child's weight and the prescribed dosage regimen.
Choice D rationale:
This choice is incorrect because it suggests a higher dose than what is prescribed. The correct dosage, based on the child's weight and prescription, is 800 mg per day, split into two doses of 400 mg each.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Rh incompatibility occurs when an Rh-negative mother is exposed to Rh-positive fetal blood, leading to the development of antibodies against Rh-positive blood cells. In this scenario, the infant of an Rh-negative mother and an Rh-positive father who is heterozygous for the Rh factor (Choice C) is more likely to have Rh incompatibility. This is because there is a higher chance that the fetus will be Rh-positive, and the mother, being Rh-negative, may produce antibodies against the Rh-positive cells of the baby, causing hemolytic disease of the newborn.
Choice B rationale:
If both the mother and the infant are Rh-negative (Choice B), there is no Rh incompatibility, as there is no Rh-positive blood to trigger an immune response in the mother.
Choice D rationale:
If both the mother and the infant are Rh-positive (Choice D), there is also no Rh incompatibility, as there is no Rh-negative blood to cause an immune reaction in the mother.
Correct Answer is D
Explanation
Choice A rationale:
Abdominal respirations do not directly predispose toddlers to frequent infections such as otitis media, tonsillitis, and upper respiratory tract infections. Abdominal respirations are a normal breathing pattern in toddlers, transitioning from the diaphragmatic breathing seen in infants. This change is due to the toddler's increased chest wall compliance and stronger intercostal muscles, facilitating more efficient breathing.
Choice B rationale:
Slower pulse and respiratory rates in toddlers compared to infants are part of normal physiological development. Toddler's heart rates range from 70 to 110 beats per minute, and respiratory rates range from 20 to 30 breaths per minute. These rates are considered normal for toddlers and do not predispose them to frequent infections.
Choice C rationale:
Toddlers do have less efficient defense mechanisms than infants, making them more susceptible to infections. This is due to the immature immune system in toddlers, which is still developing and learning to respond to various pathogens. However, this choice is not the most important factor predisposing toddlers to frequent infections; other factors play a more significant role.
Choice D rationale:
The presence of short, straight internal ear/throat structures and large tonsil/adenoid lymph tissue in toddlers is the most important factor predisposing them to frequent infections such as otitis media, tonsillitis, and upper respiratory tract infections. These anatomical features make it easier for bacteria and viruses to enter and infect the respiratory and ear passages, leading to recurrent infections.
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