Lumbar Microdiscectomy for Disc Herniation and Sciatica

Lumbar discectomy and lumbar microdiscectomy are essentially the same operation: the removal of the portion of the disc that has displaced backwards into the nerve canal, where it causes compression, pain, and neurological symptoms. The difference lies in the approach. Microdiscectomy is the modern, minimally invasive form of the procedure, performed through a smaller incision under magnification. Dr. Alexandros Blionas specializes in both classical microdiscectomy and in the pioneering awake same-day minimally invasive lumbar decompression. Dr Blionas carefully selects the correct technique — as well as the correct patients, which is what accounts for the consistently good results.

Applied indiscriminately to every patient, discectomy achieves success rates closer to 60%. That figure alone shows why selection matters. Every candidate is therefore assessed individually through the AI-supported Personalized Evidence-Based Treatment Analysis, based on their own clinical characteristics and the most recent, validated evidence — so that each patient knows in advance what the data show for their particular case and what to expect.

When discectomy is performed

The purpose of the operation is to resolve the symptoms — chiefly pain (sciatica, radiating from the lower back down the leg), numbness, and weakness. It is generally performed:

• When these symptoms are severe and have not resolved with other methods;
• When there is significant muscle weakness.

What the patient can expect

For the patient, discectomy means a hospital stay of one day — or a few hours only — and a single small incision in the lower back. Return to normal activities is possible within a few days, avoiding heavy lifting and prolonged driving for three to four weeks. Patients with a disc herniation should generally avoid heavy lifting thereafter, since other spinal levels may be affected in future.

As to how effective the operation is, the patient should expect efficacy in the range of 60–90% — meaning the likelihood of symptoms improving by more than 50% at six months.

The key question is how can a patient reach 90% efficacy rather than 60%. The answer is careful selection: outcomes approach 90% in patients whose symptoms have persisted and who have already tried conservative and pharmaceutical treatment without success. Patient selection, in other words, is the single most important factor.

Aggressive versus limited discectomy

An important technical question is how much disc is removed. Some surgeons remove the whole disc (aggressive, or subtotal, discectomy); others remove only the fragment causing the compression (limited discectomy, or sequestrectomy).

The aggressive approach reduces the likelihood of recurrent herniation. Its disadvantage is loss of disc height at the operated level: unless instrumentation is placed to support the segment, it is common for the vertebrae to settle towards one another and for instability to develop, typically producing low back pain years later.

The limited approach carries a higher recurrence rate but avoids that risk. In theory one could place instrumentation in every patient and perform an aggressive discectomy — but instrumentation makes the operation considerably more complex, with higher complications and harder recovery, and is therefore rarely the right answer.

In practice, limited removal has become the standard, accepting a small risk of recurrence. If a recurrence does occur, it does not necessarily press on the nerve again: the operation itself widens the canal, so there is more room available than there was before.

The procedure

The operation is performed either through a very small incision of 1–2 cm (minimally invasive microdiscectomy) or through a larger incision of 3–4 cm (conventional discectomy). The bone and ligament obstructing access are removed so that the disc fragment can be taken out safely, and so that additional space is created behind the nerves — which is why, as noted, a recurrence at the same level may not produce significant compression.

The published evidence shows no difference in final efficacy between the two. What microdiscectomy demonstrably offers is a lower complication rate, a shorter recovery, and a smaller, less visible scar.

See also: Awake Same-Day Minimally Invasive Lumbar Decompression

See also: Minimally invasive spine surgery

See also: Lumbar disc herniation causing sciatica