Table 1. Definition of American Society of Anesthesiologists Levels of Sedation and Anesthesia5.

	Minimal sedation (anxiolysis)	Moderate sedation (conscious sedation)	Deep sedation	General anesthesia
Responsiveness	Normal response to verbal stimuli	Purposeful response to verbal or tactile stimuli	Purposeful response to noxious stimuli or insistent verbal stimuli	Unarousable
Airway	Normal	No intervention needed	Intervention may be needed	Airway support needed
Spontaneous ventilation	Normal	Adequate	Usually inadequate	Ventilatory support usually needed
Cardiovascular function	Normal	Usually maintained	Usually maintained	May be impaired