There are four stages of anesthesia.
Stage I is called the analgesia stage. In this stage a person feels pain but does not care. Pain progressively diminishes. The patient remains awake and conscious. They can see and hear. Analgesia stage has three planes. The first two planes are relative analgesia. These two planes are appropriate for dental hygiene care. In this stage the reflexes and respiration remain normal. Best administered for short procedures.
Stage II is called the delirium or excitement phase of light anesthesia. This stage starts from loss of consciousness up to gain of rhythmical respiration. This stage of anesthesia is characterized by overly responding to stimuli, exaggerated inspirations,