Which statement describes Stage II anesthesia?

• A. Amnesia/Analgesia
• B. Delirium
• C. Surgical anesthesia
• D. Overdose

Answer: (B)

Stage II anesthesia is the delirium or excitement phase that occurs after loss of consciousness but before reaching a stable surgical level of anesthesia. In this stage the patient may become combative or disoriented, with irregular breathing and uncoordinated movements, and reflexes can be exaggerated. This differs from Stage I, which involves amnesia and analgesia, and from Stage III, the actual surgical anesthesia where the patient is more level and stable for operative conditions. It also differs from Stage IV, which is overdose with profound respiratory and circulatory depression. So, the description that fits Stage II is delirium, the brief, agitated, unsettled phase that can occur during induction. In modern practice, this stage is often very short or bypassed with rapid induction techniques.