Plain English Summary
Background and study aims.
Adolescent Idiopathic Scoliosis (AIS) is a condition that causes the spine to curve sideways. It can be treated with surgery to correct the curvature, where the spine is straightened using rods attached to the spine by screws, hooks and/or wires. The aim of this study is to find out how much force is required to move the spine to midline. We also wish to find out how much spine movement can be achieved with a maximum force of 40 lbs at one point of attachment.
Who can participate?
Patients between 8 and 16 years old with idiopathic scoliosis (curvature of the spine with no known cause) with a single curve requiring surgical treatment via a posterior (back) only surgical approach.
What does the study involve?
While the patient is undergoing surgery, force measurements are taken to determine the force necessary to move the patient’s curved spine toward midline, and the amount of curve correction at a maximum of 40 lbs of force. This takes about 10 minutes. After these measurements are taken, no follow up is required.
What are the possible benefits and risks of participating?
The risks were considered to be very low, but as with all surgeries, it is possible that some risks could develop. The main risk was that while pulling the spine toward the middle of your back, the cable, screw or rod could break or dislodge and cause damage to nerves, bone or muscle. The force used to pull the spine toward the middle will be applied gradually to minimize this risk.
Where is the study run from?
Royal National Orthopaedic Hospital (UK)
When is the study starting and how long is it expected to run for?
July 2009 to September 2009
Who is funding the study?
Kspine Inc. (USA)
Who is the main contact?
A non-randomised study to measure the force required to move the spine towards midline in adolescent idiopathic scoliosis patients
This study will measure the force required to move the spine toward midline in patients with adolescent idiopathic scoliosis.
East London and The City/Research Ethics Committee 1, 01/07/2009, ref: 09/H0703/70
Primary study design
Secondary study design
Non randomised study
Patient information sheet
Not available in web format, please use the contact details below to request a patient information sheet
Adolescent idiopathic scoliosis (AIS)
Force measurements will be taken to determine the force necessary to move a curved spine toward midline. The total duration of treatment for this study will be approximately 10 minutes. After these measurements are taken, no follow up is required.
Primary outcome measure
Force measurements to determine the force necessary to move a curved spine toward midline, measured near the beginning of the surgery and completed before the surgery to correct the patient's scoliosis is begun.
Secondary outcome measures
Amount of curve correction at a maximum of 40 lbs of force, measured near the beginning of the surgery and completed before the surgery to correct the patient's scoliosis is begun.
Overall trial start date
Overall trial end date
Reason abandoned (if study stopped)
Participant inclusion criteria
1. Patient has idiopathic scoliosis with a single curve requiring surgical treatment via a posterior only surgical approach
2. The curve appears to be compliant as evidenced by standing bending x-rays and/or the ability of the surgeon to improve the curve with external manipulation
3. Patient must be between 8 and 16 years old, either sex
Target number of participants
Participant exclusion criteria
1. Patient has an underlying neurologic or congenital pathology involving the spine in addition to idiopathic scoliosis
2. Patient has local or systemic infection
3. Patient is participating in any other device or drug study
4. Patient is grossly obese with a body mass index greater than 40 kg/m^2
5. Patient has a history of communicable disease such as human immunodeficiency virus (HIV), hepatitis, etc.
Recruitment start date
Recruitment end date
Countries of recruitment
Trial participating centre
27 Harley Street
Kspine, Inc. (USA)
Funding Body Type
Funding Body Subtype
Results and Publications
Publication and dissemination plan
Not provided at time of registration
Intention to publish date
Participant level data
Not provided at time of registration
Basic results (scientific)