Clinical trial Recruiting at 1 site Interventional Ages 18 to 80

Preventive treatment for adjacent segment issues after lumbar fusion surgery

Official title: Preventive Effect of Limited Decompression on Adjacent Segment With Pre-existing Spinal Canal Stenosis Following Posterior Lumbar Interbody Fusion: a Prospective Interventional Study

Run by Peking University Third Hospital · NCT04469387 · Data updated 2026-11-12

This study is testing whether a small surgery to relieve pressure on the spine can help prevent problems in nearby areas after people have lumbar fusion surgery.

Quick facts

Study typeInterventional
Ages18 Years to 80 Years
SexAll
Enrollment200 (estimated)
SponsorPeking University Third Hospital
Academic / other
Locations1 site (Beijing, Beijing Municipality)
StatusRecruiting
StartedSeptember 1, 2020
Main results expectedAugust 1, 2022
Study endsAugust 1, 2032
Registry record updatedSeptember 18, 2020
Trial IDNCT04469387 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are patients diagnosed with lumbar spinal stenosis requiring PLIF at the L4-S1 levels who have asymptomatic pre-existing spinal canal stenosis.

Probably not a fit

Patients with unstable adjacent segments, significant spinal imbalance, infections, tumors, or prior lumbar fusion surgeries may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This prospective study focuses on patients undergoing posterior lumbar interbody fusion (PLIF) for degenerative conditions who also have asymptomatic pre-existing spinal canal stenosis at adjacent segments. The research aims to evaluate the effects of limited decompression procedures, such as partial laminotomy and flavectomy, on preventing adjacent segment degeneration and disease. Patients will be monitored through dynamic X-ray and MRI examinations to assess the outcomes of the intervention. The study is designed to provide insights into the management of adjacent segment pathologies following lumbar fusion surgeries.

Why it matters

Potential benefit: If successful, this approach could significantly reduce the incidence of adjacent segment degeneration and improve postoperative quality of life for patients.

How similar studies have gone: While adjacent segment degeneration is a known complication, this specific approach of limited decompression in asymptomatic patients is relatively novel and has not been extensively tested in prior studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* A clear diagnosis of lumbar spinal stenosis, and surgical level of L4-S1 (The levels to be operated on were decided by matching the clinical symptomatology with the radiological findings of the spinal levels that needed decompression);
* Patients have asymptomatic pre-existing spinal canal stenosis (cerebrospinal fluid occlusion grade=1) at adjacent segment.
* Failed at least eight weeks conservative treatment;

Exclusion Criteria:

* Unstable factors (slip, rotation, lateral bending, etc.) in adjacent segment L3/4;
* Preoperative sagittal and coronal imbalance of the spine;
* Lumbar infection and/or tumor diseases;
* A previous history of lumbar fusion surgery.

Where it's running

  • Peking University Third Hospital
    Beijing, Beijing Municipality, China
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.