Indirect vs. Direct Decompression for Treatment of Central Stenosis: RCT

NCT ID: NCT04708977

Last Updated: 2021-10-11

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

WITHDRAWN

Clinical Phase

NA

Study Classification

INTERVENTIONAL

Study Start Date

2021-02-08

Study Completion Date

2021-09-29

Brief Summary

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This is a prospective, randomized clinical trial of patients undergoing 1-level lateral lumbar spinal fusion. This study seeks to randomize patients indicated for Lateral Lumbar Interbody Fusion (LLIF) into one of two groups: direct decompression and indirect decompression.

Detailed Description

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While indirect decompression has been largely accepted as a strategy to treat foraminal stenosis, there is some disagreement regarding its efficacy in treating patients with central and lateral recess stenosis. The current study seeks to randomize patients indicated for Lateral Lumbar Interbody Fusion (LLIF) into one of two groups: direct decompression and indirect decompression. Enrolled participants will be evaluated before surgery, during their hospital course and post-operatively at 6 weeks, 3 months, 6 months, 1 and 2 years. Operative details, complications, reoperation rates, patient reported outcomes, clinical and radiographic outcome measures will be compared.

Conditions

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Patients With Spinal Stenosis Indicated for LLIF

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

This is a single-center, prospective, randomized controlled trial.
Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Participants
Patients will be blinded to randomization and surgical technique will not be evident based on postoperative radiographs. Research coordinators, surgeons, principal investigator (assisting with randomization) and other co-investigators will not be blinded to the type of surgical procedure performed.

Study Groups

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Group 1: Indirect Decompression

Lateral lumbar interbody fusion (LLIF), with indirect decompression

Group Type ACTIVE_COMPARATOR

One-level lateral lumbar interbody fusion with Indirect Decompression

Intervention Type PROCEDURE

One-level lateral lumbar interbody fusion, with or without percutaneous posterior instrumentation. Thorough discectomy will be performed using lateral access. Fusion will then be performed using lateral access interbody cage and allograft bone graft with or without use of recombinant human bone morphogenic protein 2.

Group 2: Direct Decompression

Lateral lumbar interbody fusion (LLIF), with direct decompression

Group Type ACTIVE_COMPARATOR

One-level lateral lumbar interbody fusion with Direct Decompression

Intervention Type PROCEDURE

One-level lateral lumbar interbody fusion, with or without percutaneous posterior instrumentation. Thorough discectomy will be performed using lateral access instruments. Fusion will then be performed using lateral access interbody cage and allograft bone graft with or without use of recombinant human bone morphogenic protein 2.

Additionally, direct decompression through midline or parasagittal approach will be utilized. A unilateral laminotomy or complete bilateral laminectomy may be performed.

Interventions

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One-level lateral lumbar interbody fusion with Indirect Decompression

One-level lateral lumbar interbody fusion, with or without percutaneous posterior instrumentation. Thorough discectomy will be performed using lateral access. Fusion will then be performed using lateral access interbody cage and allograft bone graft with or without use of recombinant human bone morphogenic protein 2.

Intervention Type PROCEDURE

One-level lateral lumbar interbody fusion with Direct Decompression

One-level lateral lumbar interbody fusion, with or without percutaneous posterior instrumentation. Thorough discectomy will be performed using lateral access instruments. Fusion will then be performed using lateral access interbody cage and allograft bone graft with or without use of recombinant human bone morphogenic protein 2.

Additionally, direct decompression through midline or parasagittal approach will be utilized. A unilateral laminotomy or complete bilateral laminectomy may be performed.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Fusion indicated by the treating surgeon. Fusion may be indicated for one or more of the following reasons:

* Mobile degenerative spondylolisthesis
* Severe vertical foraminal stenosis
* Adjacent segment degeneration and/or degenerative disc disease with suspected discogenic pain
* One-level central canal stenosis

* WITH neurogenic claudication
* As measured in preoperative MRI
* Oswestry Low Back Pain Disability Questionnaire score \> 35% (18/50)
* Failed 3 months of conservative treatment
* Willing to give written informed consent and psychosocially, mentally, and physically able to comply fully with protocol, including adhering to follow-up schedule and requirements, and filling out forms

Exclusion Criteria

* Multilevel central canal stenosis
* Patients with vertebral endplate dimensions that are too small to allow for safe placement of an intervertebral cage
* Known allergy to titanium, polyethylene, cobalt, chromium, or molybdenum
* Prior surgery at index disc level (discectomy, decompression, or fusion)
* History of spinal or vertebral infection of the lumbar spine
* History of vertebral fracture of the lumbar spine
* Current pregnancy or interest in becoming pregnant over the next 1 year
* Active infection-systemic or local
* Non-English speakers
Minimum Eligible Age

18 Years

Maximum Eligible Age

75 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Hospital for Special Surgery, New York

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Sravisht Iyer, MD

Role: PRINCIPAL_INVESTIGATOR

Hospital for Special Surgery, New York

Locations

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Hospital for Special Surgery

New York, New York, United States

Site Status

Countries

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United States

References

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Other Identifiers

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2019-2228

Identifier Type: -

Identifier Source: org_study_id

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