Final answer:
When suctioning a child's airway, the EMT must avoid touching the back of the airway, suctioning on the way out, and using a rigid-tip catheter.
Step-by-step explanation:
When suctioning a child's airway, the EMT must take care not to touch the back of the airway. This is because the sensitive tissues in the back of the airway can easily be injured or irritated. Additionally, the EMT should not suction on the way out as this can cause further damage to the airway. It is also important for the EMT to avoid using a rigid-tip catheter. Instead, a flexible-tip catheter should be used to minimize the risk of injury to the airway.