An injection is administered into the back or around nerves to numb a part of your body
The patient is conscious or sedated (sleepy) but free from pain
It may be preferrable to a general anaesthesia
The patient is monitored throughout the operation and anaesthesia, and the anaesthetist will be there at all times.
Advantages over general anaesthesias are: good pain relief, less drowsiness, less sickness, earlier food intake after the operation, some protection from blood clots