A 6-month-old infant who has croup and an O2 saturation of 92% on room air

A 15-year-old adolescent who is 2 hr postoperative following an open reduction and internal fixation of the left ankle and is requesting pain medication

A 3-year-old toddler who has gastroenteritis, moderate dehydration, and had two loose bowel movements over the past 24 hr

A 10-year-old child who is awaiting surgery for an appendectomy and experienced sudden relief from pain