One technique. All epidural injections involve putting medications into the epidural space, which is where nerves pass on their way from the spinal cord to all parts of the body. For anesthesia, numbing medications are used that block pain and movement. For pain relief, narcotics or steroids may be used. Epidural injections can be done in any part of the spine from the neck down to the lower back.
There are 3 basic. Epidurals are divided into 1. Interlaminar - entering the epidural space in the middle of the back 2. Transforaminal- entering through the foramen 3. Caudal- entering at the base near the coccyx.