Final answer:
Elbow restraints are used to prevent the child from putting fingers into the mouth after cleft palate surgery.
Step-by-step explanation:
The elbow restraints are prescribed for an 18-month-old toddler who just had surgery for a cleft palate to keep the child from putting fingers into the mouth. The restraints are used to prevent the child from touching the surgical site and potentially causing damage or infection. It is important for the parents to follow the nurse's instructions to ensure the child's proper healing and recovery.