Table 1:

Continuum of depth of sedation—definition of general anesthesia and levels of sedation/analgesia

	Minimal Sedation/ Anxiolysis	Moderate Sedation/Analgesia (Conscious Sedation)	Deep Sedation Analgesia	General Anesthesia
Responsiveness	Normal response to verbal stimulation	Purposeful^{^a} response to verbal or tactile stimulation	Purposeful^{^a} response after repeat or painful stimulation	Unarousable even with painful stimulus
Airway	Unaffected	No intervention required	Intervention may be required	Intervention often required
Spontaneous ventilation	Unaffected	Adequate	May be inadequate	Frequently inadequate
Cardiovascular function	Unaffected	Usually maintained	Usually maintained	May be impaired

↵a Reflex withdrawal from a painful stimulus is not considered a purposeful response.