Actively Recruiting
Durability of Suppl. Rod Constructs-SuppleMentAry Rod Technique for Long-segment Posterior Instrumented Spinal Fusions
Led by AO Foundation, AO Spine · Updated on 2026-03-04
1244
Participants Needed
17
Research Sites
227 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
This is a multicenter retrospective comparative cohort study. The index surgery for this study is primary or revision long-segment posterior thoracolumbar (TL) instrumented fusion using either a supplementary rod construct or a dual-rod construct. Eligible patients who already had index surgery, will be identified for enrollment through a review of medical records of the participating surgeons at the study sites.
CONDITIONS
Official Title
Durability of Suppl. Rod Constructs-SuppleMentAry Rod Technique for Long-segment Posterior Instrumented Spinal Fusions
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Age 45 years and older.
- Patients who underwent long-segment posterior thoracolumbar instrumented fusion using either supplementary rod constructs or dual-rod constructs.
- Long-segment defined as upper instrumented vertebra (UIV) at thoracic level and lower instrumented vertebra (LIV) at sacrum/ilium.
- Supplementary rod constructs include at least one extra rod spanning multiple vertebral levels alongside primary rods.
- Index surgery can be primary or revision surgery using posterior spinal fusion, possibly combined with other approaches.
- For revision surgeries, primary rods must be replaced unless Harrington or Luque rods remain with proper levels or are extended accordingly.
- Index surgery performed between January 1, 2014, and December 31, 2020.
- Minimum of 3 months follow-up after index surgery.
- Ability to provide informed consent per IRB/EC procedures if applicable for retrospective data analysis.
You will not qualify if you...
- Spinal fusion performed for acute trauma (within 1 year of trauma).
- Spinal fusion performed for tumor.
- Spinal fusion performed for infection.
- Patients with Parkinson's Disease.
- Patients with neuromuscular disorders.
- Patients with spine malignancies requiring chemotherapy or radiation therapy.
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Trial Site Locations
Total: 17 locations
1
Stanford Spine Clinic
Redwood City, California, United States, 94588
Actively Recruiting
2
University of California
Sacramento, California, United States, 95819
Actively Recruiting
3
UCSF Spine Center
San Francisco, California, United States, 94144
Actively Recruiting
4
John Hopkis Hospital
Baltimore, Maryland, United States, 21287
Actively Recruiting
5
University of Minnesota Medical Center
Minneapolis, Minnesota, United States, 55454
Actively Recruiting
6
Washington University in St. Louis, School of Medicine
St Louis, Missouri, United States, 63110
Actively Recruiting
7
Washington University in St. Louis, School of Medicine, Saint Louis, Missouri 63110
St Louis, Missouri, United States, 63310
Actively Recruiting
8
Columbia University / NYP Och Spine Hospital
New York, New York, United States, 10032
Actively Recruiting
9
University of Virginia
Charlottesville, Virginia, United States, 22908
Actively Recruiting
10
University of Calgary Spine
Calgary, Canada, T2N 2T9
Actively Recruiting
11
University of Toronto
Toronto, Canada, M5T 2S8
Actively Recruiting
12
Duchess of Kent Children's Hospital
Hong Kong, China
Actively Recruiting
13
Kothari Medical Centre
Kolkata, India
Actively Recruiting
14
Hamamatsu University School of Medicine
Hamamatsu, Japan, 431-3192
Actively Recruiting
15
University of Tokyo
Tokyo, Japan, 113-8654
Actively Recruiting
16
Hospital Vall d´Hebron
Barcelona, Spain, 08035
Actively Recruiting
17
Acibadem Maslak Hospital
Istanbul, Turkey (Türkiye)
Not Yet Recruiting
Research Team
A
Alix Frischknecht
CONTACT
V
Viola Grünenfelder
CONTACT
How is the study designed?
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
2
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