Sagittal Imbalance and Lumbar Stenosis Surgery: Decompression Without Implant (CLE/EOS)

February 4, 2026 updated by: Centre Hospitalier Universitaire Dijon

Lumbar stenosis (LSS) is the most frequent degenerative lumbar disease and is the most frequent indication for spinal surgery. When non-invasive treatments fail, decompression surgery is the gold standard therapy for the majority of patients and generally improves symptoms.

However, few studies have investigated the improvement in posture (radiological parameters) after surgery. In lumbar stenosis, patients may present a forward leaning posture (to relieve pain), which is responsible for sagittal imbalance.

The aim of this prospective study was to evaluate the repercussions of decompression surgery on sagittal balance and to compare these with aux clinical results. investigators included patients operated on for isolated lumbar canal stenosis.

Study Overview

Status

Completed

Conditions

Study Type

Observational

Enrollment (Actual)

72

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • France
      • Dijon, France, 21079
        • CHU de DIJON

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

consecutive patients who underwent open decompression surgery (laminotomy) were prospectively included in this study

Description

Inclusion Criteria:

  1. Symptoms and signs of neurogenic claudication and radiological signs of central lumbar stenosis;
  2. Patients undergoing open decompression surgery ≤ 3 levels,
  3. All patients with symptoms that did not respond to at least 3 months of non-invasive treatment.

Exclusion Criteria:

Patients were excluded from the study if they had one or several of the following clinical and/or radiological criteria:

  1. spondylolisthesis (disc slip > 5 mm),
  2. criteria showing instability (variation of > 10° in the angle formed by the vertebral endplates on dynamic images).
  3. scoliosis (Cobb angle > 20 °).
  4. Patients lost to follow-up were excluded.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Patients who underwent open decompression surgery
Observational study on patients who underwent open decompression surgery

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Vertical sagittal axis
Time Frame: 12 months
Evaluation of sagittal parameters
12 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
radiographic evaluation with EOS
Time Frame: 12 months
Use of the EOS system and 3D SterEOS software o carry out very precise measurements and 3D reconstructions by bone modeling which give access to new parameters
12 months
Functional Interest
Time Frame: 12 months
Stenosis self-questionnaire (Zurich Claudication Questionnaire)
12 months
Sagittal parameters
Time Frame: 12 months
PI (pelvic incidence) in degrees,
12 months
Sagittal parameters
Time Frame: 12 months
SS (sacral slope) in degrees
12 months
Sagittal parameters
Time Frame: 12 months
PT (pelvic tilt) in degrees
12 months
Sagittal parameters
Time Frame: 12 months
LL (lumbar lordosis) in degrees
12 months
Sagittal parameters
Time Frame: 12 months
TK in degrees
12 months
Sagittal parameters
Time Frame: 12 months
TPA (T1 Pelvic Angle) in degrees
12 months
Sagittal parameters
Time Frame: 12 months
C7 Barrey's ratio as a percentage
12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Centre Hospitalier Universitaire Dijon

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

November 1, 2014

Primary Completion (Actual)

May 1, 2016

Study Completion (Actual)

May 1, 2016

Study Registration Dates

First Submitted

January 27, 2017

First Submitted That Met QC Criteria

February 22, 2017

First Posted (Actual)

February 28, 2017

Study Record Updates

Last Update Posted (Actual)

February 6, 2026

Last Update Submitted That Met QC Criteria

February 4, 2026

Last Verified

February 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • MADKOURI-BEAURAIN 2016

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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