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Treatment of Adolescent Idiopathic Scoliosis Patients Using the Ellipse MAGEC System

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
Ellipse Technologies, Inc. Identifier:
First received: July 2, 2012
Last updated: August 5, 2016
Last verified: August 2016
The purpose of this study is to collect data on the use of the Ellipse MAGEC System to treat patients with adolescent idiopathic scoliosis (AIS) who have failed external brace therapy.

Adolescent Idiopathic Scoliosis

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Treatment of Adolescent Idiopathic Scoliosis Patients Using the Ellipse MAGEC System

Resource links provided by NLM:

Further study details as provided by Ellipse Technologies, Inc.:

Primary Outcome Measures:
  • Change in major scoliotic curve magnitude [ Time Frame: Change from baseline to 36 months postoperative ]
    Measured in degrees

  • Number and Types of Adverse Events [ Time Frame: Operative through 36 months postoperative ]

Secondary Outcome Measures:
  • Radiographic evaluation coronal balance compared to baseline [ Time Frame: Change from baseline to 36 months postoperative ]
  • Radiographic evaluation sagittal balance compared to baseline [ Time Frame: Change from baseline to 36 months postoperative ]
  • Percent of patients indicated for surgical spine fusion [ Time Frame: Change from baseline to 36 months postoperative ]
  • Quality of life assessment via SRS-30 questionnaire [ Time Frame: Change from baseline to 36 months postoperative ]
  • Comparison of Rib Hump prominence [ Time Frame: Change from baseline to 36 months postoperative ]
  • Expected vs. Actual Device Lengthening [ Time Frame: All postoperative visits where lengthening is conducted ]

Estimated Enrollment: 20
Study Start Date: March 2012
Estimated Study Completion Date: October 2016
Primary Completion Date: April 2016 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   10 Years to 15 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients diagnosed with Adolescent Idiopathic Diagnosis

Inclusion Criteria:

  • Diagnosis of Adolescent Idiopathic Scoliosis
  • Failed external brace therapy defined as either (a) progression of the curve greater than 5 degrees at any time while undergoing external brace therapy, or (b) inability or unwillingness to comply with at least 16 hours per day of external bracing
  • Skeletally immature (Risser Sign 0, 1, 2, or 3)
  • In girls, either (a) pre-menarchal, or (b) post-menarchal by no more than 6 months
  • Age between 10 and 15
  • Primary Cobb angle greater than 25 degrees but not yet requiring spine fusion
  • Candidate for surgical implantation of spinal instrumentation
  • Patient resides locally with respect to the Investigator's clinic and is willing and able to comply with the requirements of the protocol
  • Must sign informed consent to permit the use of personal health data

Exclusion Criteria:

  • Patients with a pacemaker, implanted cardiac defibrillator, or any other electronic implant
  • Patients who require an MRI following implantation
  • Skeletally mature (Risser Sign 4 or 5; or fused tri-radiate cartilage)
  • Diagnosis of other musculoskeletal or developmental illness that might be responsible for the spinal curvature
  • History of previous surgical treatment for AIS
  Contacts and Locations
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Please refer to this study by its identifier: NCT01633931

Hong Kong
University of Hong Kong
Hong Kong, Pokfulam, Hong Kong
Sponsors and Collaborators
Ellipse Technologies, Inc.
Principal Investigator: Behrooz Akbarnia, MD San Diego Center for Spinal Disorders
  More Information

Additional Information:
Responsible Party: Ellipse Technologies, Inc. Identifier: NCT01633931     History of Changes
Other Study ID Numbers: PR0038
Study First Received: July 2, 2012
Last Updated: August 5, 2016

Additional relevant MeSH terms:
Spinal Curvatures
Spinal Diseases
Bone Diseases
Musculoskeletal Diseases processed this record on May 24, 2017