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Do Patients With Lumbar Spinal Stenosis Benefit From Decompression Of Levels With Adjacent Moderate Stenosis? A Prospective Cohort Study From The NORDSTEN Study London Spine Lumbar Stenosis

This article discusses a study that aims to investigate whether patients with lumbar spinal stenosis (LSS) benefit from dual-level decompression (DLD) compared to single-level decompression (SLD). The study also looks into whether DLD patients have longer surgery and hospital stay durations, higher complication rates, and lower reoperation rates compared to SLD patients. The analysis includes data from the Norwegian Degenerative Spondylisthesis and Spinal Stenosis study, and the results show that there is no superior clinical effectiveness for dual-level surgery compared to single-level surgery in patients with adjacent moderate stenosis

Summarised by Mr Mo Akmal – Lead Spinal Surgeon
The London Spine Unit : most specialised spine centre in London

Published article

This study, alongside the NORDSTEN-LSS trial on patients with adjacent moderate stenosis as well as an index stenosis, showed no superior clinical effectiveness for dual-level surgery compared to single-level surgery.

Spine Lumbar Spinal Stenosis Expert. Best Spinal Surgeon UK
Abstract Background: Lumbar spinal stenosis (LSS) is characterized by pain that radiates to the buttocks and/or legs, aggravated by walking and relieved by forward flexion. There is poor correlation between clinical symptoms and severity of stenosis on MRI, and multi-level stenosis has not been described to present worse symptoms or treatment outcomes, compared to patients,

Abstract

Background: Lumbar spinal stenosis (LSS) is characterized by pain that radiates to the buttocks and/or legs, aggravated by walking and relieved by forward flexion. There is poor correlation between clinical symptoms and severity of stenosis on MRI, and multi-level stenosis has not been described to present worse symptoms or treatment outcomes, compared to patients with single-level stenosis. In patients with one level with severe stenosis combined with an adjacent level with moderate stenosis, the surgeon must decide whether to decompress only the narrowest level or both, to achieve the best possible outcome. The potential benefits of performing surgery on an adjacent moderate stenosis is debated, and the scientific evidence in scarce.

Purpose: The aim of the present study was to investigate whether patients with a level of adjacent moderate stenosis, along with an index stenosis, benefitted from a dual-level decompression (DLD) compared to a single-level decompression (SLD). Furthermore, to investigate whether DLD patients had longer duration of surgery and hospital stay, higher rates of complications and/or lower rate of reoperations compared to SLD patients.

Study design: Prospective cohort study.

Patient sample: We analyzed data from the Norwegian Degenerative Spondylisthesis and Spinal Stenosis study- Spinal Stenosis Trial (NORDSTEN-SST). In this randomized multicenter study, 437 patients were included, evaluating clinical outcomes of three different surgical treatment options for LSS. Patients with degenerative spondylolisthesis were excluded.

Method: Based on preoperative MRI, the present analysis included all patients who had a moderate stenosis (defined as Schizas B or C) in addition to a predefined index stenosis (the level with the smallest cross-sectional area). We compared patients who, based on the surgeons` choice, received a dual-level decompression, with those receiving a single-level decompression.

Outcome measures: The primary outcome was mean change in the Oswestry Disability Index (ODI) score from baseline to two-year follow up.Secondary outcomes were proportion of success (30 % reduction in ODI score), the Numeric Rating Scales for back and leg pain (NRS), the EuroQol 5-dimensional questionnaire utility index (EQ-5D), the Zurich Claudication Questionnaire (ZCQ), the Global Perceived Effect (GPE)-scale, duration of surgery, duration of hospital stay, perioperative complications and reoperation rates.

Results: Among the 222 patients, included in the analysis, 108 underwent DLD and 114 underwent SLD. There was no difference in change scores for any of the investigated patient-reported outcomes between the groups after two years. However, the DLD group had longer duration of surgery and longer length of hospital stay. There was no difference in reoperation rates or perioperative complications.

This study, alongside the NORDSTEN-LSS trial on patients with adjacent moderate stenosis as well as an index stenosis, showed no superior clinical effectiveness for dual-level surgery compared to single-level surgery.

Keywords: Lumbar spinal stenosis; adjacent level stenosis; decompression; multi-level spinal stenosis; surgical treatment.

The London Spine Unit : most specialised spine centre in London

Read the original publication:

Do patients with lumbar spinal stenosis benefit from decompression of levels with adjacent moderate stenosis? A prospective cohort study from the NORDSTEN study

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Abstract Background: Lumbar spinal stenosis (LSS) is characterized by pain that radiates to the buttocks and/or legs, aggravated by walking and relieved by forward flexion. There is poor correlation between clinical symptoms and severity of stenosis on MRI, and multi-level stenosis has not been described to present worse symptoms or treatment outcomes, compared to patients

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