minute ventilation ( ve ) ( ml min-1 ) , respiratory frequency ( f ) , mixed expired carbon dioxide fraction ( feco2 ) and end-tidal carbon dioxide concentration ( e'co2 ) ( % ) were measured , and alveolar ventilation ( va ) , deadspace ( vd ) , deadspace/tidal volume ratio ( vd/vt ) and carbon dioxide output ( vco2 ) calculated in 58 anaesthetized , spontaneously breathing infants and children weighing 2.8-20.5 kg .
C0021270
infants
C0008059
children