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 B
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 D
Explanation
Choice A rationale:
Morning sickness, which refers to nausea and vomiting during pregnancy, is a common symptom but not a definitive sign of pregnancy. It can also be caused by various other factors such as food poisoning or gastrointestinal issues. Therefore, it is not a positive sign of pregnancy.
Choice B rationale:
Quickening, which refers to the first fetal movements felt by the mother, is a subjective sign of pregnancy. It is not a definitive indication of pregnancy as it can be mistaken for other abdominal sensations. Quickening usually occurs between 18 to 22 weeks of gestation, making it a later sign and not an early positive sign of pregnancy.
Choice C rationale:
A positive pregnancy test, specifically a blood or urine test detecting human chorionic gonadotropin (hCG), is a reliable indicator of pregnancy. However, it is a biochemical sign and not a physical sign. It does not directly confirm the presence of the fetus or its well-being, making it less specific than auscultating the fetal heartbeat.
Choice D rationale:
Fetal heartbeat auscultated with Doppler/fetoscope is a positive sign of pregnancy. The healthcare provider can hear the fetal heartbeat using a Doppler ultrasound device or fetoscope, confirming the presence of a viable pregnancy. This sign is considered positive because it directly indicates the presence of a developing fetus, providing reassurance about the pregnancy status. Fetal heartbeat can usually be detected around 10 to 12 weeks of gestation.
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.
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