Table 1.

Clinical criteria used to classify bronchiolitis according to Consensus Baraldi et al. (modified). The presence of two or more criteria from each category listed in the table attribute bronchiolitis to that severity class.

	MILD	MODERATE	SEVERE
RESPIRATORY RATE	Normal or slightly increased	Increased	Significantly increased.
RESPIRATORY WORK	Slight retractions of the chest wall	Modest retractions of the chest wall Sway of the head (nodding) Breath of the nasal fins	Significant retractions of the chest wall Grunting Breath of the nasal fins
SATURATION OF OXYGEN	O2 supplementation not required SatO2 > 95%	SatO2 90–95%	SatO2 < 90% No response to O2
FEEDING	Normal or slightly reduced	50–75% of normal food intake	<50% of normal food intake Inability to feed
APNEA	Absent	Brief episodes	Episodes on the rise