A nurse is caring for a child who has a urinary tract infection. Which of the following findings should the nurse expect?

The correct answer is choice C. 6.8 to 7.7 kg (15 to 17 lb).

Choice A rationale:

This weight range is above the average for a 6-month-old infant. According to growth charts, the 50th percentile weight for a 6-month-old male is approximately 7.9 kg (17 lb 8 oz), and for a female, it’s about 7.3 kg (16 lb 1 oz). Therefore, 8.6 to 9.5 kg would be considered above average and not the anticipated weight for most infants.

Choice B rationale:

This weight range is below the average for a 6-month-old infant. The average weight at 6 months is significantly higher than 4.1 to 5 kg, as infants are expected to double their birth weight by 5 months of age. Therefore, an infant weighing between 9 to 11 lb at 6 months would be considered underweight.

Choice C rationale:

This weight range is within the average for a 6-month-old infant. As mentioned, the 50th percentile weights for 6-month-old infants are approximately 7.9 kg for males and 7.3 kg for females. This choice falls within the expected weight gain trajectory where an infant is anticipated to double their birth weight by 5 months and then gain an additional pound or so by 6 months.

Choice D rationale:

This weight range is significantly above the average for a 6-month-old infant. It is well above the 95th percentile for this age group and would be considered unusual without underlying health conditions that could contribute to such a weight at this age. An infant weighing between 23 to 25 lb at 6 months would be exceptionally rare and likely indicative of an abnormal growth pattern.

Choice A rationale:
This statement reflects an accurate understanding of varicella (chickenpox) transmission and infection control. The lesions of varicella contain the virus and are contagious until they have crusted over. Allowing the child to go to the playroom only after the lesions have crusted helps prevent the spread of the virus to other individuals.
Choice B rationale:
This statement is incorrect because waiting for the crusts to fall off the lesions before bathing the child is not necessary. In fact, keeping the lesions clean and maintaining proper hygiene through gentle bathing can help prevent secondary bacterial infections.
Choice C rationale:
This statement is incorrect because bedrest for 3 days is not necessary for a child with varicella. While it's important to minimize contact with others during the contagious phase, physical activity can be gradually resumed as long as the lesions have crusted to prevent transmission.
Choice D rationale:
This statement is incorrect. Once a person has had chickenpox (varicella), they develop immunity to the virus and do not need to wear a mask when visiting someone with active varicella. This is because they are already immune to the virus due to their prior infection.