A Clinical Trial Evaluating a Total Disc Replacement in Patients with Cervical Disc Disease
ISRCTN | ISRCTN83445469 |
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DOI | https://doi.org/10.1186/ISRCTN83445469 |
Secondary identifying numbers | NUVA-CP-0904 |
- Submission date
- 21/05/2010
- Registration date
- 07/06/2010
- Last edited
- 07/06/2010
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Musculoskeletal Diseases
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year
Plain English summary of protocol
Not provided at time of registration
Contact information
Dr Scott Kitchell
Scientific
Scientific
1200 Hilyard
Eugene
97401
United States of America
Study information
Study design | Non-randomized multicentre historically controlled |
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Primary study design | Interventional |
Secondary study design | Non randomised controlled trial |
Study setting(s) | Hospital |
Study type | Treatment |
Participant information sheet | Not available in web format, please use contact details to request a patient information sheet |
Scientific title | A Non-Randomised Controlled Clinical Trial Evaluating a Total Disc Replacement in Patients with Cervical Disc Disease |
Study objectives | This study will be a non-randomized trial consisting of patients with single level (C3 to C7) symptomatic cervical disc disease who have not previously received fusion surgery at the same level, and have failed to improve with conservative treatment for at least 6 weeks prior to enrollment, or who present with progressive neurological symptoms or signs in the face of conservative treatment. |
Ethics approval(s) | The medical ethics committee of El Centro Medico Hospital del Prado approved on the 15th of April 2010 (ref: NUVA-CP-0904) |
Health condition(s) or problem(s) studied | Degenerative Disc Disease |
Intervention | Cervical spinal reconstruction |
Intervention type | Other |
Primary outcome measure | Individual patient success at 24 months, tested using Blackwelders method for testing non-inferiority with delta of 10%. Success is defined as: 1. Improvement in the Neck Disability Index (NDI) by ≥ 15 points at 24 months compared to Baseline 2. No device failures requiring revision, re-operation (including supplemental fixation), or removal from the patient 3. No device-related serious adverse event and 4. Maintenance or improvement of neurologic status (based on sensory, motor, and reflex assessment scores and observational gait analysis) |
Secondary outcome measures | 1. Range of Motion (ROM) defined as more than 3 degrees total flexion / extension. If the ROM is less than or equal to 3º the patient will be defined as having 'non-motion' 2. Fusion (defined as ≤ 3° of ROM at the operative level, absence of radiolucent lines around ≥ 50% of the implant, and no displacement or migration of the device (defined as > 3mm abnormal movement measured from AP and lateral plain films) 3. SF-36 improvement of ≥ 15% at 24 months compared to Baseline 4. Visual analog pain scale (VAS) improvement of ≥ 20 mm at 24 months compared to Baseline 5. Disc height from the lateral radiograph showing maintenance or improvement from Baseline at 24 months |
Overall study start date | 26/05/2010 |
Completion date | 31/12/2010 |
Eligibility
Participant type(s) | Patient |
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Age group | Adult |
Lower age limit | 18 Years |
Upper age limit | 60 Years |
Sex | Both |
Target number of participants | 30 |
Key inclusion criteria | 1. Age: 18-60 years of age (inclusive and skeletally mature) 2. A diagnosis of symptomatic cervical disc disease, defined as image-confirmed pathology: herniated disc, spondylosis, and/or loss of disc height. Spondylosis is defined as image-confirmed disc desiccation, loss of disc height, bridging osteophytes, and/or uncovertebral arthrosis. Loss of disc height is specified as a measurement of at least 25% less than an adjacent nonsymptomatic level, but with a minimum of 1mm height remaining 3. Functional neurological deficit (i.e., exhibits at least one sign associated with cervical level to be treated, including abnormal reflex, decreased motor strength, abnormal dermatome sensitivity, or pain in a dermatomal distribution); 4. Symptomatic level is C3-4, C4-5, C5-6 or C6-7 (one level) 5. Preoperative Neck Disability Index (NDI) ≥ 30 points (considered moderate disability; Vernon 1991); 6. Unresponsive to conservative treatment for ≥ 6 weeks, and/or exhibits progressive symptoms and/or signs of nerve root and/or spinal cord compression in the face of conservative treatment 7. Not pregnant, nor interested in becoming pregnant within the follow-up period of the study 8. Willing and able to comply with the requirements defined in the protocol for the duration of the study 9. Signed and dated Informed Consent |
Key exclusion criteria | 1. Prior cervical fusion, prior laminectomy (prior cervical laminotomy that has not violated the facets need not be excluded), and/or prior cervical facetectomy at the operative level 2. Requiring surgical treatment that would leave the patient with a postoperative deficiency of the posterior elements 3. Signal changes in the cord on preoperative T2-weighted MRI and/or clinically significant myelopathy which would be described as gait disturbance, loss of manual dexterity, or bowel or bladder incontinence/retention. 4. Radiographic signs of significant instability at operative level (> 3mm translation, > 11° rotation different from adjacent level) 5. Bridging osteophytes or motion < 3° 6. Radiographic confirmation of significant facet joint disease or degeneration 7. Chronic neck or arm pain of unknown etiology 8. Cervical fracture, anatomic anomaly, or deformity (e.g. ankylosing spondylitis, scoliosis) at the levels to which the prosthesis will be attached 9. Severe spondylolisthesis (greater than grade 1) 10. Endocrine disorders or connective tissue diseases 11. Rheumatoid arthritis or other autoimmune disease 12. Progressive neuromuscular disease, e.g., muscular dystrophy, multiple sclerosis 13. Chronic steroid users 14. Taking any medications or drugs in doses that are known to potentially interfere with the bone metabolism or soft tissue healing, which may include (but is not limited to) the following: inhaled glucocorticoids for asthma, corticosteroids, thyroid hormones, blood thinners (heparin, warfarin), gonadotropin-releasing hormone agonists for prostate cancer treatment, contraceptive medroxyprogesterone, lithium for bi-polar disorder treatment, anticonvulsants, aluminum-containing antacids, tetracycline 15. Osteoporosis to a degree that spinal instrumentation would be contraindicated (DEXA T-score less than or equal to -2.5; DEXA necessary only if patient exhibits risk factors for low bone mass as quantified in DEXA screening questionnaire) 16. Diabetes mellitus requiring insulin management 17. Presence of metastases or active spinal tumor malignancy 18. Body Mass Index (BMI) > 40 19. Active local or systemic infection, including AIDS, hepatitis 20. Having been enrolled in another investigational device study within the last 90 days 21. Having had another cervical device implanted that would interfere with the surgical approach, study or control device, or follow-up evaluations 22. Demonstrates 3 or more signs of nonorganic behavior, such as Waddells signs 23. History of substance abuse 24. Involved in spinal litigation 25. Mentally incompetent 26. Incarcerated |
Date of first enrolment | 26/05/2010 |
Date of final enrolment | 31/12/2010 |
Locations
Countries of recruitment
- Mexico
- United States of America
Study participating centre
1200 Hilyard
Eugene
97401
United States of America
97401
United States of America
Sponsor information
Nuvasive Inc. (USA)
Industry
Industry
7475 Lusk Blvd
San Diego
92104
United States of America
https://ror.org/036dqy506 |
Funders
Funder type
Industry
Nuvasive Inc. (USA)
No information available
Results and Publications
Intention to publish date | |
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Individual participant data (IPD) Intention to share | No |
IPD sharing plan summary | Not provided at time of registration |
Publication and dissemination plan | Not provided at time of registration |
IPD sharing plan |