ClinicalTrials.gg
Status unknownNCT01067014Updated Sep 23, 2013

The iO-Flex® Study: Evaluation of the Baxano iO-Flex® System for Decompressive Lumbar Surgery

An observational study in Lumbar Spinal Stenosis, sponsored by Baxano Surgical, Inc.. Status unknown at 18 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2013-09-23.

Sponsored by Baxano Surgical, Inc. · Observational

The sponsor has not verified this record recently (last verified Sep 2013), so the status shown — last known as Active, not recruiting — may be out of date.
Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
75
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to evaluate the clinical performance of the iO-Flex® System in reducing pain and symptom severity in patients with one or two level lumbar spinal stenosis that requires surgery.

02

Conditions studied

  • Lumbar Spinal Stenosis

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Keywords

  • Lumbar spinal stenosis
  • Decompression
  • Lumbar spinal decompression
  • Lumbar spinal decompressive surgery
03

In context

Spinal Stenosis

458 studies on the registry are indexed under Spinal Stenosis; 105 are open to participants now.

This study's planned enrollment of 75 is below the median of 120 across 154 observational studies indexed under Spinal Stenosis.

Browse Spinal Stenosis studies →

Lead sponsor

Baxano Surgical, Inc. is the lead sponsor of 6 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Patients at least 18 years of age presenting with failed conservative treatment for one or two level lumbar spinal stenosis

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

Candidates for this study must meet ALL of the following criteria:

  1. Age ≥18 years
  2. Leg/buttock pain with or without back pain
  3. Failed nonoperative medical management
  4. A minimum leg pain score of 4.0 cm on the Visual Analogue Scale (VAS)
  5. Clinical/radiographic diagnosis of LSS in the L2-L3 to L5-S1 region
  6. Able and willing to give voluntary, written to participate in this clinical study

Exclusion criteria

Exclusion Criteria

Candidates will be excluded from the evaluation if ANY of the following apply:

  1. Back pain only
  2. A diagnosis of central stenosis only
  3. More than two levels requiring decompression
  4. Fixed motor deficit
  5. Significant instability of the lumbar spine as defined by ≥ 4mm translation between standing flexion and extension lumbar spine plain film radiographs
  6. Sustained pathologic fractures of the vertebrae or multiple fractures of the vertebrae and/or hips
  7. Primary disc pathology and/or patients who will undergo a discectomy
  8. Prior surgery of the lumbar spine at the level(s) of planned treatment
  9. Spondylolisthesis or degenerative spondylolisthesis greater than Grade 1 (on a scale of 1 to 4)
  10. Spondylolysis (pars fracture) at any level in the lumbar spine
  11. Degenerative lumbar scoliosis with a Cobb angle greater than or equal to 25°
  12. Symptomatic vascular claudication in the lower extremities
  13. Cauda equina syndrome (neural compression causing neurogenic bowel or bladder dysfunction)
  14. Evidence of active (systemic or local) infection at time of surgery
  15. Paget's disease at involved segment or to the vertebra, osteomalacia, or other metabolic bone disease
  16. Tumor in the spine or a malignant tumor except for basal cell carcinoma
  17. Prisoner or transient
  18. Recent history of known narcotic abuse
  19. Any significant psychological disturbance past or present, psychotic or neurotic, that could impair the consent process or ability to complete subject self-report questionnaires
  20. Involved in pending litigation of the spine or worker's compensation related to the back
  21. Inability to communicate clearly in the English language
  22. Morbid obesity ( > 40)
  23. Plans to relocate within the next 2 years
  24. Pregnant or planning to become pregnant
  25. Irreversible coagulopathy or bleeding disorder

    a. Subjects on Coumadin or other anticoagulants may participate. Investigators should follow routine practices for perioperative discontinuation and reinitiation of anticoagulants.

  26. Subject unwilling to undergo blood transfusion, if necessary
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
75 participants (estimated)

Groups and cohorts

  • iO-Flex

    Device: Baxano iO-Flex® System

Interventions

  • DeviceBaxano iO-Flex® System

    Decompressive lumbar surgery using Baxano iO-Flex® System

06

What researchers measure

Primary outcomes

  1. Change in the Symptom Severity domain of the Zurich Claudication Questionnaire (ZCQ) from baseline to 6 months post-procedure quantified as a percentage of subjects with an improvement of at least 0.5 points

    Time frame: 6 months

  2. Change in Visual Analog Scale (VAS) for leg pain related to lumbar spinal stenosis at the treatment level from baseline to 6 months post-procedure quantified as a percentage of subjects with an improvement of at least 30%

    Time frame: 6 months

  3. Re-operation at the treatment level(s) at one year post-procedure

    Time frame: One year

  4. Acute safety outcomes will be determined by evaluating the type, frequency, severity, and relatedness of adverse events through discharge visits for all subjects

    Time frame: Hospital discharge

Secondary outcomes

  1. Changes in Visual Analog Scale scores compared to baseline

    Time frame: 6 weeks, 3 months, 6 months, 12 months, 24 months

  2. Changes in Zurich Claudication Questionnaire scores compared to baseline

    Time frame: 6 weeks, 3, 6, 12, and 24 months

  3. Changes in Oswestry Disability Index scores compared to baseline

    Time frame: 6 weeks, 3, 6, 12, and 24 months

  4. Flexion/extension lumbar spine plain film radiographs will be collected and assessed for presence/absence of instability at baseline, 6-month, 12-month, and 24-months

    Time frame: 6, 12, and 24 months

  5. Long term safety outcomes that occur after discharge through 2 years post-procedure will be determined by evaluating adverse events involving the musculoskeletal or neurological systems

    Time frame: Through 2 years

07

Study locations

18 sites
  • Eden Medical Center
    Castro Valley, California 94546, United States
  • Olympia Medical Center
    Los Angeles, California 90036, United States
  • Watsonville Community Hospital
    Watsonville, California 95076, United States
  • Resurgens Orthopaedics
    Cumming, Georgia 30041, United States
  • Suburban Orthopedics
    Bartlett, Illinois 60103, United States
  • Spine Midwest, Inc.
    Jefferson City, Missouri 65101, United States
  • McCune-Brooks Regional Hospital
    Joplin, Missouri 64804, United States
  • Buffalo Spine Surgery
    Lockport, New York 14094, United States
  • Triangle Orthopaedic Associates
    Chapel Hill, North Carolina 27514, United States
  • Moses Cone Hospital
    Greensboro, North Carolina 27401, United States
  • Caldwell Memorial Hospital
    Lenoir, North Carolina 28645, United States
  • Rothman Institute
    Bensalem, Pennsylvania 19020, United States
  • Easton Hospital
    Easton, Pennsylvania 18017, United States
  • Carolina Neurosurgery & Spine Center
    Greenwood, South Carolina 29646, United States
  • Neurospine Solutions, PC
    Bristol, Tennessee 37620, United States
  • Spine Works Institute
    North Richland Hills, Texas 76182, United States
  • University of Utah
    Salt Lake City, Utah 84132, United States
  • Tuckahoe Orthopaedic Associates
    Richmond, Virginia 23226, United States
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 23, 2013, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01067014
Lead sponsor
Baxano Surgical, Inc.
Responsible party
Sponsor
First posted
Feb 11, 2010
Start date
Feb 2010
Primary completion
Dec 2014 (estimated)
Completion
Dec 2014 (estimated)
Last update
Sep 23, 2013

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Sep 2013. You cannot join it, but the record below documents what was studied.

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