A nurse is selecting a toy for a 7-month-old infant.
Which of the following toys should the nurse choose?

Step 1: The nurse needs to administer 1mg of vitamin K. The available vitamin K injection is 1 mg per 0.5 mL.

Step 2: To find out how many mL the nurse should administer, we divide the required dose by the concentration of the injection. So, 1 mg ÷ (1 mg/0.5 mL).

Step 3: This simplifies to 1 mg × (0.5 mL/1 mg).

Step 4: The mg units cancel out, leaving us with 0.5 mL. So, the nurse should administer 0.5 mL of the vitamin K injection per dose.

Choice A rationale

While rest is important for a child, suggesting that the child needs to rest does not address the parents’ concern about their child crying when they leave.

Choice B rationale

This is the correct answer. It is normal for an 8-month-old child to show signs of separation anxiety when their parents leave. This is a part of their normal development where they start to understand object permanence - the concept that things and people exist even when they’re out of sight. This can make them upset when their parents leave as they understand their parents are somewhere else, but they don’t know when they’ll return.

Choice C rationale

Notifying the provider about a normal developmental behavior is not necessary. It’s important for parents to understand that this behavior is a normal part of their child’s development.

Choice D rationale

While an overstimulating environment can cause distress in children, in this case, the child is upset because of their parents leaving, not because of the environment.