Aspen Spinous Process Fixation System for Use in PLF in Patients With Spondylolisthesis

January 8, 2019 updated by: Zimmer Biomet

A Multi-Center Prospective Study Evaluation Aspen Spinous Process Fixation System for Use in Posterolateral Fusion (PLF) in Patients With Spondylolisthesis

The purpose of this clinical investigation is to evaluate the clinical outcomes of subject with spondylolisthesis undergoing posterolateral fusion (PLF) surgery utilizing the Aspen™ Spinous Process Fixation System. The Aspen™ device will be evaluated using Oswestry Disability Index (ODI) improvement and success of fusion.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Terminated

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Evaluate the clinical outcomes of subject with spondylolisthesis undergoing posterolateral fusion (PLF) surgery utilizing the Aspen™ Spinous Process Fixation System. The Aspen™ device will be evaluated using Oswestry Disability Index (ODI) improvement and success of fusion.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
25

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Arizona
      • Phoenix, Arizona, United States, 85013
        • St. Joseph's Hospital and Medical Center
    • California
      • Mission Viejo, California, United States, 92691
        • Community Orthopedic Medical Group
    • Indiana
      • Indianapolis, Indiana, United States, 47905
        • Goodman Campbell Brian and Spine
    • New York
      • Lockport, New York, United States, 14094
        • Buffalo Spine Surgery
    • Oregon
      • Tualatin, Oregon, United States, 97062
        • Pacific Spine Specialists

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

50 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients 50 years and older with spondylolisthesis requiring a single level posterolateral decompression and posterolateral fusion

Description

Inclusion Criteria:

  • Age between 50 and older
  • Diagnosis of mild segmental instability on standing radiography lateral film defined as degenerative spondylolisthesis ≤ 4mm in dynamic imaging (i.e., flexion/extension)
  • Scheduled for an elective single-level posterior decompression and posterolateral fusion using AspenTM spinous process fixation system
  • Oswestry Disability Index (ODI) v 2.1 score >30%
  • Failed at least 3 months of conservative care (non-surgical) OR has clinical signs of neurological deterioration
  • Signed Informed Consent Form

Exclusion Criteria:

Pre-operative

  • Marked degenerative spondylolisthesis (>4mm)
  • Lesions requiring surgery involving two levels
  • Prior surgery at index level or adjacent level
  • Prior spinal fusion surgery
  • Isthmic or lytic spondylolisthesis
  • Incompetent or missing posterior arch at the affected level (e.g. complete laminectomy, pars defect)
  • Requires complete laminectomy at level of surgery
  • Facet joints at implant level are absent or fractured
  • Vertebral body compromise or acute fracture at implant level
  • Body mass Index (BMI) ≥ 35
  • Known allergy to titanium
  • Osteoporosis: SCORE (Simple Calculated Osteoporosis Risk Estimation) will be used to screen subjects requiring DEXA. Subjects with T-score < -2.5 will be excluded
  • Paget's disease, osteomalacia, or any other metabolic bone disease
  • Use of medications or any drug known to potentially interfere with bone/soft tissue healing (e.g. chronic systemic steroids)
  • Planned use of additional segmental fixation (eg. facet screws, anterior/lateral plating, anchored cages)
  • Use of Bone Morphogenetic Protein (BMP)*
  • Unlikely to comply with the follow-up evaluation schedule
  • In the opinion of the Investigator, Subject has history of chemical substance dependency or significant psychosocial disturbance that may impact the outcome or study participation
  • Active participation in a clinical trial of another drug or device
  • Active systemic infection or any other health condition that would preclude surgery
  • History of invasive malignancy, except if the subject has received treatment and displayed no clinical signs and symptoms for at least five years
  • Pregnant or planning to become pregnant during study participation
  • Involvement in active litigation related to back problems at the time of screening
  • Direct involvement in the execution of this protocol
  • Pre-existing conditions that could interfere with the evaluation of outcome measures (e.g. musculoskeletal, neuromuscular, etc.)

Intra-operative Exclusion

  • Intra-operative visualization of a > 4mm spondylolisthesis not previously noted radiographically
  • Any change in the surgical procedure that violates the inclusion/exclusion criteria. (eg. switching to double level procedure; placing pedicle screws as posterior fixation).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Aspen Spinous Process Fixation Device
The Aspen device provides supplemental posterior fixation for fusion
Device: Aspen Spinous Process Fixation Device
The Aspen device will be placed as posterior fixation to Posterolateral Fusion (PLF)

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Absolute change in Oswestry Disability Index (ODI)
Time Frame: baseline to 12 months post-operative
baseline to 12 months post-operative

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Title: Fusion success
Time Frame: 12 Months post-operative
12 Months post-operative
Change in Visual Analogue Scale (VAS) (pain)
Time Frame: Baseline, 6 weeks, 2 weeks, 3 months, 6 months, 12 months, & 24 months
Baseline, 6 weeks, 2 weeks, 3 months, 6 months, 12 months, & 24 months
Neurological status
Time Frame: Baseline, 6 weeks, 3 months, 6 months, 12 months, & 24 months
motor functions, reflexes, and sensory
Baseline, 6 weeks, 3 months, 6 months, 12 months, & 24 months
Operative parameters (estimate blood loss, surgery time, fluoroscopy time, and length of hospital stay)
Time Frame: Surgical Visit
Surgical Visit
Pain medication usage
Time Frame: Baseline, surgery, 6 weeks, 3 months, 6 months, 12 months, & 24 months
Baseline, surgery, 6 weeks, 3 months, 6 months, 12 months, & 24 months
Change in EQ-5D-3L
Time Frame: Baseline, 6 weeks, 3 months, 6 months, 12 months, & 24 months
Baseline, 6 weeks, 3 months, 6 months, 12 months, & 24 months
Change in Zurich Claudication Questionnaire
Time Frame: Baseline, 12 months & 24 months
Baseline, 12 months & 24 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Zimmer Biomet

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Shah, Goodman Campbell Brain and Spine

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 1, 2012

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 1, 2015

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 1, 2015

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 15, 2012

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 20, 2012

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 22, 2012

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 9, 2019

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 8, 2019

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2019

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ASP-11-002

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Undecided

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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