During a well-baby examination, the nurse measures the head circumference, and it is the same as the chest circumference. On the basis of this measurement, what action should the nurse take?

Correct Answer: A

Rationale: The head circumference growth rate during the first year is approximately 0.4 inches (1 cm) per month. By 10 to 12 months of age, the infant's head and chest circumferences are equal. In this case, where the head circumference matches the chest circumference, it is a normal finding in infants around 10-12 months. Therefore, the most appropriate action is to document these measurements in the infant's health care record. Suspecting hydrocephalus or suggesting a skull x-ray would be premature and not indicated based on this measurement. Similarly, telling the mother that the infant is growing faster than expected is not accurate and could cause unnecessary concern.

Correct Answer: D

Rationale: An 8- to 9-month-old infant can string vowels and consonants together. The first words, such as 'Mama,' 'Daddy,' 'bye-bye,' and 'baby,' begin to have meaning. A 1- to 3-month-old infant produces cooing sounds. Babbling is common in a 3- to 4-month-old. Single-consonant babbling occurs between 6 and 8 months of age. Therefore, the milestone of the infant saying 'Mama' is the most appropriate for a 9-month-old, indicating early language development. The other choices are developmentally inaccurate for a 9-month-old infant.

Correct Answer: C

Rationale: For a 2-year-old child, saying 'Mine!' when playing with toys is an example of age-appropriate play. Toddlers at this age are possessive and asserting their sense of ownership. Building towers with blocks and trying to color within the lines involve more advanced motor skills and cognitive abilities that are typically not fully developed in a 2-year-old. Jumping rope requires coordination and balance beyond what a 2-year-old can usually achieve. Therefore, choices A, B, and D are not considered age-appropriate plays for a 2-year-old child.

Correct Answer: C

Rationale: The correct advantage of using CVADs for chemotherapeutic agent administration is that chemotherapeutic agents can be caustic to smaller veins. Many chemotherapeutic drugs are vesicants, which can cause tissue damage even in low concentrations. Using a CVAD to administer these agents into a large vein is optimal as it reduces the risk of damage. Choice A is incorrect as CVADs are actually more expensive than a peripheral IV, making it a disadvantage. Choice B is incorrect because the frequency of administration depends on the specific drug being administered, not on the access device, so it does not represent a universal advantage. Choice D is incorrect because IV chemotherapeutic agents are typically not self-administered at home; they are usually given in a hospital, outpatient, or clinic setting, making it an invalid advantage of using CVADs.

Correct Answer: B

Rationale: According to Erikson, the correct developmental task for a toddler who has developed 'a will of his own' and 'acts as if he can control others' is Autonomy versus doubt and shame. Toddlers at this stage are asserting their wills and realizing they can control others, which is part of developing autonomy. However, they may also experience doubt and shame if their assertiveness is met with disapproval. Trust versus mistrust is the developmental task of the infant, where the main focus is on developing trust in the caregiver. Initiative versus guilt is the developmental task of the preschool-age child, emphasizing the balance between taking initiative and feeling guilty. Industry versus inferiority is the developmental task of the school-age child, focusing on competence and self-esteem.