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Clinical Study page title

PASS (Posterior Arthroplasty Safety Study)

Flexuspine has been granted conditional approval by the FDA (as of April, 2010) to begin the initial U.S. phase of the PASS Study. Patient enrollment will be underway shortly in the U.S., while Flexuspine continues to establish clinical study sites in several countries outside the U.S. for a similar study.

Study Objective: Flexuspine’s Posterior Arthroplasty Safety Study is an early-stage interventional feasibility study that will provide Flexuspine the opportunity to evaluate safety and early efficacy parameters of the FSU under a controlled clinical setting. Patients who have been screened and found eligible for the study will undergo the FSU implant procedure. Study patient candidates are those most likely to otherwise receive a fusion procedure. See below for study inclusion and exclusion criteria.

Participants: There are a limited number of sites and patients in the initial phase of the U.S. feasibility study. Sites outside the U.S. are currently being established. Study patients will be spinal fusion candidates with Degenerative Disc Disease and facet compromise.  Enrolled patients will complete a past medical history review, standard quality of life questionnaire, neurological exam, and x-rays.

Study Overview:  Patients are followed according to standard of care practices and are evaluated at hospital discharge; week 6; months 3, 6, 12, and 24. Follow-up visits involve quality of life questionnaires, neurological exam, and x-rays. Study data is recorded on case report forms, and the study will be monitored according to standards of Good Clinical Practice.

Outcome measures analyzed:
Assessment of quality of life questionnaires, including Oswestry Disability Index
  and SF-36
Motion assessment
Improvement in neurological status
Radiographic assessment of fusion success
Evaluation of work status
Evaluation of pharmacologic support
Need of additional surgical intervention
Assessment of adverse events

FACT (Fusion Assessment Clinical trial)

 Study Objective: The Fusion Assessment Clinical Trial (FACT) is an observational study designed to evaluate spinal fusion outcomes and investigate potential correlations between pretreatment conservative care and surgical outcomes. There is not an investigational device used in this study. The study simply monitors routinely scheduled spinal fusion procedures. The FACT study is being conducted with similar inclusion and exclusion criteria as the PASS Study, thus allowing for a solid comparative analysis between the two patient groups.

 

Participants: Spinal fusion candidates with Degenerative Disc Disease and facet compromise may enroll if they meet specific enrollment criteria. They will complete past medical history review, standard quality of life questionnaire, neurological exam, and x-rays.

Study Overview: The spinal fusion procedure and instrumentation used is left up to the surgeon investigator's discretion. Patients are followed according to standard of care practices and are evaluated at hospital discharge; week 6; months 3, 6, 12, and 24. Follow-up visits involve quality of life questionnaires, neurological exam, and x-rays. Study data is recorded on case report forms, and the study will be monitored according to standards of Good Clinical Practice.

Outcome measures analyzed in both studies:
Assessment of quality of life questionnaires; Oswestry Disability Index
  and SF-36
Improvement in neurological status
Radiographic assessment of fusion success
Evaluation of work status
Evaluation of pharmacologic support
Need of additional surgical intervention
Assessment of adverse events

Summary of Patient Inclusion Criteria for both PASS and FACT Studies:
1. Age >30 years and skeletally mature

2. Lumbar (L3-S1) DDD symptomatic at no more than one level
3. Patient with chronic low back pain that has failed conservative therapy
    and is a candidate for spinal fusion

4. DDD with facet degeneration confirmed by either MRI or CT myelography
    and x-rays (AP, Lat, Flex/Ext - within 3 months of enrollment)

5. Oswestry Low Back Disability Questionnaire score of ≥ 40%
6. Willing and able to meet follow-up criteria

General Exclusion Criteria for both PASS and FACT studies:
1. Osteoporosis/osteopenia
2. Insulin dependent diabetics
3. Morbid obesity
4. Advanced bridging osteophytes and/or ankylosing spondylosis
5. Patients with involved vertebral endplates dimensionally smaller than 31 mm
    in the M/L and/or 24 mm in the A/P direction
6. Clinically compromised vertebral bodies at the affected level
7. Spondylolisthesis or spinal stenosis at other than operative levels
8. Cervical myelopathy
9. Lumbar scoliosis (defined as more than 11° sagittal deformity) as indicated
    by plain x-ray films, MRI and/or discography
10. Prior fusion at any lumbar level

For more information on Flexuspine’s clinical studies please contact:
Dawn Clark, PA-C - info@flexuspine.com