Sciatica and Failed Back Surgery: Transforaminal Epidural Adhesiolysis

For nerve blocks we use ropivacaine. For steroids, we primarily use dexamethasone in spinal procedures. For joint injections, we usually use Kenacort (triamcinolone).

In India, opioids are scheduled drugs — you need a prescription from a competent doctor: a pain specialist, anaesthesiologist or neurologist, not a general surgeon or ENT. For morphine and fentanyl specifically, the hospital needs a government licence to hold a certain quantity, and we use a special designated government form that we stamp, with patients required to bring a consumption chart we submit to the drug controller. Tramadol, tapentadol and buprenorphine don't need special licensing, but you do need a valid prescription from a competent doctor.

The first issue is simply diagnosis — ninety per cent of doctors not trained for this kind of spinal pain can't diagnose facetogenic pain. We call it axial pain, which includes facetogenic and discogenic pain, and gabapentinoids are of no use for it whatsoever — yet eight out of ten patients with axial pain are given these drugs with no results. It's a diagnostic challenge first: specific questions in the history, a specific examination, then a diagnostic block to confirm the pain is coming from the facet before proceeding to facet joint RFA.

If the femoral head is involved, we can perform radiofrequency ablation of the hip joint, ablating the articular nerves supplying the joint — it's a very rewarding procedure. But if the pain is arising from the bone itself or visceral involvement, the best approach is opioid analgesics rather than high-dose NSAIDs, which will damage the kidneys. Primary management is opioid-based — morphine or tramadol with paracetamol and a neuropathic agent — and where there is a specific anatomical target, we address that interventionally as well.

According to international Spine Society guidelines, any pain coming from the spine where the primary problem is pain alone does not require surgery. The indications for surgery are disability — foot drop, motor or sensory deficit — or more than moderate to severe canal stenosis on MRI, where pain intervention can buy time but can't treat the disease. If a patient comes to me with a neurological deficit, I immediately refer to the spine surgeon and don't proceed with intervention. If pain is the only presenting symptom, we treat it — there's a very clear demarcation.

Scar tissue and adhesions can form around a nerve root and cause sciatica. Transforaminal epidural adhesiolysis treats this by irrigating the anterior epidural space with saline and hyaluronidase to release the adhesions, typically at the L3 to S1 levels.

Only a minimal 2mg dose of dexamethasone per level is used, a marked reduction from the larger steroid doses this procedure has historically relied on.

Yes. Failed back surgery syndrome can be addressed with a transforaminal epidural below the level of the previous fixation to release a nerve root trapped in scar tissue, performed in the cathlab rather than through a second operation.

Adjacent-segment facetogenic pain often develops after fixation. It is addressed with radiofrequency ablation of the facet joints above the level of the fixation.