Which description defines deep sedation?

• A. Controlled state of depressed consciousness produced by pharmacological and non-pharmacological methods, with partial loss of protective reflexes, inability to respond purposefully to verbal command, and inability to maintain airway
• B. Unconsciousness produced by pharmacological methods only
• C. Minimal sedation with no airway changes
• D. Full consciousness with preserved reflexes

Answer: (A)

Deep sedation is a controlled depressed level of consciousness achieved with pharmacologic and, when needed, nonpharmacologic methods, where protective reflexes are partially lost and the patient is not able to respond purposefully to verbal commands. Importantly, there is potential for airway compromise, meaning maintaining airway may require assistance or intervention. This places deep sedation between minimal/moderate sedation and general anesthesia: the patient is not fully unconscious, but the level of consciousness and reflexes are sufficiently reduced that careful monitoring and airway readiness are necessary.

The other descriptions describe levels outside deep sedation. Unconsciousness produced by pharmacologic methods suggests general anesthesia rather than deep sedation. Minimal sedation with no airway changes describes a lighter level with preserved reflexes and safe airway function. Full consciousness with preserved reflexes indicates no sedative effect at all.