Life Span Development and Patients with Special Challenges

1. A small body is not a small adult

Start with the head. In an infant and a young child, it is proportionally larger than yours. So when that child lies flat on your cot, the head pushes forward and flexes the neck. That flexion closes the airway by itself. Hyperextension closes it just as fast, so you're not trying to open the airway wide — you're finding neutral. Pad under the shoulders, not the head. That brings the body up to meet the head and holds the sniffing position.

The tongue fills more of a smaller jaw. The tracheal cartilage is softer and more collapsible than yours. So a small airway is closed by things an adult would shrug off — mucus, swelling, a little blood.

Infants breathe through the nose. A blocked nose is the entire obstruction in an infant, not a nuisance. So suction the nares of any infant in respiratory distress before you do anything else.

The ribs are cartilaginous and pliable, with little muscle or fat covering them, and young children breathe mostly with the diaphragm. That's why rib fractures are uncommon in kids. When you find one, the force behind it was enormous, and multisystem injury travels with that kind of force. The same soft chest means the lung tissue underneath tears easily under bagging pressure. So you ventilate a child with only enough force to make the chest rise slightly — no more — and you keep that diaphragm free to move.

Oxygen demand per kilogram runs roughly twice yours, and lung reserve is smaller. So a child who stops breathing well drops their saturation fast. Any interruption in ventilation is urgent here.

Surface area is large relative to mass, and glucose stores are limited. So burns go deeper, heat and fluid are lost fast, and hypothermia complicates everything else you're doing. Keep them warm. Cover the head — that's where the heat goes — but leave the face clear.