If your symptoms are only Low back pain
and you have received relief (though temporary) from Lumbar Epidural injections, you may obtain relief from insertion of a pump which directly delivers painkillers to the spine. If you have shooting pain down your legs (Sciaitica) in addition, and your symptoms are getting worse the scans have to be reviewed/repeated along with a full medical examination to see whether you may benefit from a spinal operation to releive the nerve root compression
. This operation is not aimed at relieving the backache
, but can help the sciatica
hope this helps?