how do you prevent Anaesthesia awareness and why does it happen

Question: how do you prevent Anaesthesia awareness and why does it happen
- Keywords:
  anaesthesia,
  awareness,
  prevent
Asked by anon-174154 to Yewande on 21 Jun 2018. This question was also asked by anon-174604.
- Yewande Oyekenu answered on 21 Jun 2018:
  
  Awareness during surgery with general anaesthesia can be prevented by measuring the depth of anaesthesia in each patient with the aid of monitors. It happens because different patients require different quantities of the anaesthetic drug to get them to the same unconscious level.

Question: how do you prevent Anaesthesia awareness and why does it happen