In infants under 6 months of age air normally enters the trachea by th
e nose because the tongue fills the oral cavity, and the oral route is
open only when the infant is making muscular efforts such as crying o
r gasping. The present recommendation for infant resuscitation is for
the resuscitator's mouth to cover the mouth and nose of the baby. We s
et out to test whether this recommendation is feasible. We measured th
e dimensions of the faces of 28 babies aged between 2 and 4 months (th
e age when resuscitation is most often needed) and of the mouths of 25
of their mothers. Only 2 mothers would have been able to cover with t
heir mouths the nose and closed mouth of 2 babies (not their own). The
mannequins often used to teach adults to resuscitate infants are misl
eading because they present a wide open mouth, thus implying that that
is the preferred route. We recommend that the nasal route of air entr
y be taught to parents for resuscitation of babies who have stopped br
eathing.