Usually when you buy a ventilator in a hospital, you buy a different one for children, you buy a different one for transport. This one will do everything, and it will do it at half the price and doesn't need compressed air.
Normalmente cuando compras un respirador en un hospital, compras uno diferente para niños, compras uno diferente para transporte. Éste lo hará todo, y lo hará a mitad de precio y no necesita aire comprimido.