Types of Anesthesia
There are three main categories of anesthesia, each having many forms and uses. They are:
In general anesthesia
, you are unconscious and have no awareness or other sensations. There are a number of general anesthetic drugs - some are gases or vapors inhaled through a breathing mask or tube and others are medications introduced through a vein.
In regional anesthesia
, your anesthesiologist makes an injection near a cluster of nerves to numb the area of your body that requires surgery. You may remain awake, or you may be given a sedative, either way you do not see or feel the actual surgery taking place. There are several kinds of regional anesthesia; the two most common are spinal anesthesia and epidural anesthesia.
In local anesthesia
, the anesthetic drug is usually injected into the tissue to numb just the specific location of your body requiring minor surgery.
Reference: Lifeline to Modern Medicine