Lumbar Spinal Stenosis

What spinal stenosis is

Spinal stenosis is the condition in which the canal through which the nerves travel becomes narrowed, so that the nerves are compressed and symptoms such as pain and muscle weakness develop.

Lumbar stenosis — narrowing in the lower part of the spine — means the following. The passage through which the nerves travel is bounded by the bones of the spine, the discs, and the spinal ligaments. With age, wear causes the bony elements and the ligaments to thicken, and at certain levels the canal becomes narrower. Very often this causes no problems at all; sometimes, however, particularly when the narrowing is advanced, it interferes with nerve function.

Symptoms

The defining feature of stenosis is that its symptoms are far more pronounced than those of a simple disc herniation: numbness, weakness in the legs, and pain. The symptoms usually affect both legs, and there is a characteristic additional symptom — neurogenic claudication, an inability to walk beyond a certain distance. A patient may, for example, walk comfortably for 100 meters and then develop severe pain or weakness that forces them to stop.

Treatment

The approach to stenosis follows a similar philosophy to that for a disc herniation causing sciatica. Initial management is usually with medication, followed by minimally invasive techniques such as epidural injections. Both aim to relieve the symptoms and reduce inflammation in the area, creating temporarily more space for the nerves.

Where the pain arises predominantly from the facet joints, a further option that avoids the burden of an operation is radiofrequency neurolysis (RF ablation).

Surgery is the final option, and its results are considerably more impressive — precisely because the symptoms of stenosis are severe and interfere significantly with daily life.

Careful, individualized treatment selection. All these conservative options are part of Dr. Blionas’ philosophy: he proceeds to surgery only when conservative management has failed or is not appropriate. To avoid unnecessary or inappropriate treatment that burdens the patient without result, every case is assessed individually through the AI-supported Personalized Evidence-Based Treatment Analysis, drawing on the patient’s own clinical characteristics alongside the most recent, validated evidence. Each patient is fully informed of what the data show for every option in their particular case, of what to expect, and of how their recovery is likely to proceed.

Surgery for lumbar spinal stenosis

The aim of surgery is to decompress the neural structures being constricted by the narrowed canal. It involves the mechanical removal of part of the canal wall — bone, ligament, and where relevant disc material — so that space is again created for the nerves. The difference from the conservative options is that the result is permanent rather than temporary.

The minimally invasive techniques (MISS) in which Dr. Blionas trained at American Neurosurgical Associates and with specialists at leading centers cause less muscle trauma, less postoperative pain, less blood loss, and allow faster recovery.

The choice of technique depends on the anatomy of the spine, the patient’s general condition, and the judgment of the spine surgeon. The options include:

• Laminectomy or hemilaminectomy — removal of the posterior part of the vertebra (the lamina), together with hypertrophied ligament or osteophytes where necessary, to open the spinal canal and free the nerve roots. In a hemilaminectomy only a small portion of the lamina is removed, sufficient to decompress the point at which the nerve is compressed.
• Foraminotomy / foraminoplasty — widening of the foramen, the opening through which the nerves exit the spine.
• Fusion — where the stenosis is accompanied by spinal instability, or where decompression requires the removal of enough bone to risk creating instability.

The surgeon approaches the spine, usually from behind, removes the bone and soft tissue compressing the nerves, and where necessary places stabilizing implants. Mobilization takes place on the same or the following day, and the length of stay depends on the type of procedure performed.

See in detail: Awake Same-Day Minimally Invasive Lumbar Decompression

See in detail: Epidural injections

See in detail: Laminectomy

See in detail: Lumbar spinal fusion

See in detail: AI in treatment selection