Surgical Treatment of Irreducible Atlantoaxial Dislocation
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Anterior and posterior treatment strategy, Simple posterior approach treatment strategy.
- Who it may be relevant to
- Registry conditions: Irreducible Atlantoaxial Dislocation. Basic parameters: up to 80 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- China
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
A Randomized Controlled Study for Surgical Treatment of Irreducible Atlantoaxial Dislocation
Overview
At present, there is a lack of standardized, large-scale, and high-level evidence-based medicine research on the safety and effectiveness of treatment of irreducible atlantoaxial dislocation (IAAD).Based on this, the goal of this prospective randomized controlled study is to systematically investigate the optimal surgical approach (simple posterior approach and the combined anterior and posterior approach) for managing IAAD, providing insights into the most efficacious and safest course of action. And long-term follow-up will be conducted on patients to evaluate the safety and effectiveness of different surgical methods, and to develop diagnostic and treatment standards for irreducible atlantoaxial dislocation.
Detailed description
The choice of surgical strategies for treating irreducible atlantoaxial dislocation (IAAD) is still a controversial topic. Surgical approaches under consideration of IAAD encompass the simple posterior approach and the combined anterior and posterior approach. The former offers procedural simplicity but has inherent limitations in the extent of reduction. In contrast, the latter approach holds the potential for a more comprehensive and reliable release and reduction. However, it also presents an elevated risk of infection and surgical complexity. The choice between these two strategies remains a controversy. Based on this, the goal of this prospective randomized controlled study is to systematically investigate the optimal surgical approach for managing IAAD, providing insights into the most efficacious and safest course of action.
Six high-level centers for the treatment of IAAD participated in this randomized controlled study. After rigorous sample size analysis, we plan to recruit 260 IAAD patients into two distinct trial groups: the "Simple Posterior Surgery Group" and the "Combined Anterior and Posterior Surgery Group". By analysing the comprehensive radiological assessment, the systematic tracking of neurological function improvement, meticulous evaluation of specific adverse events and a 12 month post-surgery follow-up we will systematically investigate the optimal surgical approach for managing IAAD.
Besides, this research endeavor has received full ethical clearance from the Peking University Third Hospital (PUTH) Medical Science Research Ethics Committee (IRB00006761-M2023203). All enrolled participants will provide informed consent voluntarily.
Interventions
- Procedure Anterior and posterior treatment strategy
Before surgery, a large weight traction of 1/6 body weight was used to determine the reversibility of atlantoaxial dislocation. After determining that it is difficult to restore the dislocation, a technique of anterior oral release and posterior fixation fusion was used for reduction, with sequential release of the longus colli and longus capitis, the anterior longitudinal ligament, the blitateral lateral mass joints, the contracted soft-tissue mass between the odotiod and the anterior C1 tuberc - Procedure Simple posterior approach treatment strategy
Preceding the surgical procedure, an assessment was conducted utilizing 1/6 weight traction to ascertain the reducibility of atlantoaxial dislocation. Upon confirmation of IAAD, the chosen approach involved the utilization of a specially designed spreader, tailored to the patient's atlanto-axial joint morphology. Upon entering the joint space, the spreaders were skillfully maneuvered to gently open the joint through rotational and prying actions. Subsequently, two cages, pre-filled with autogeno
Primary outcome measures
- Complete Decompression Rate [Time frame: 12 months]
- Bone Graft Fusion Rate [Time frame: 12 months]
- Atlantoaxial Reduction Rate [Time frame: 12 months]
Secondary outcome measures (3)
- Incidence of Adverse Events (12 Months After Surgery) [Time frame: 12 months]
- Improvement Rate of Quality of Life (12 Months After Surgery) [Time frame: 12 months]
- Improvement of Neurological Function [Time frame: 12 months]
Eligibility criteria
Inclusion criteria
- Eligible participants encompass individuals within the age range of 0 to 80 years, without regard to gender.
- Patients who have received a diagnosis of irreducible atlantoaxial dislocation (IAAD) based on preoperative imaging and skull traction evaluation, with a traction weight equivalent to 1/6 of their body weight following anesthesia. These patients are candidates for surgical intervention.
- Participants who have provided informed consent either in person or through their legal representative (the principal).
Exclusion criteria
- Individuals with concomitant medical conditions or diseases that significantly impact surgical treatment, such as malignant metastasis or infectious diseases, will be excluded from the study.
- Critically ill patients, who are not suitable candidates for surgical intervention, will also be excluded.
- Patients who actively decline to participate in this research project will not be included in the study cohort.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Sequential
- Masking
- Single blind
- Primary purpose
- Treatment
Study locations
China · 1 center
- Peking University Third Hospital — Beijing
Identifiers
NCT: NCT05847270 · M2023203