Anaesthesia can be defined as states of unconsciousness produced by controlled reversible drug induced intoxication of the central nervous system in which the patient neither perceives nor recalls noxious stimuli. The word is derived from the Greek for ‘without feeling’. It can be classified into two major groups – General or Local/Regional. | Anaesthesia can be defined as states of unconsciousness produced by controlled reversible drug induced intoxication of the central nervous system in which the patient neither perceives nor recalls noxious stimuli. The word is derived from the Greek for ‘without feeling’. It can be classified into two major groups – General or Local/Regional. |