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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT05849363
Other study ID # XW-NS-GBTBI
Secondary ID
Status Recruiting
Phase N/A
First received
Last updated
Start date June 1, 2023
Est. completion date September 1, 2025

Study information

Verified date March 2023
Source Xuanwu Hospital, Beijing
Contact Zan Chen
Phone +8613911712120
Email chenzan66@163.com
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The etiology of Goal B type basilar invagination (BI) is still not clear, and it may be related to platybasia and short slope. There is no unified standard surgical strategy for Goal B type BI, and different surgical strategies have a great influence on the surgical results of patients. The purpose of our prospective study in China is to (1) further clarify the etiology of Goal B type BI, and (2) improve the surgical outcome in these patients.


Recruitment information / eligibility

Status Recruiting
Enrollment 200
Est. completion date September 1, 2025
Est. primary completion date June 1, 2025
Accepts healthy volunteers No
Gender All
Age group N/A and older
Eligibility Inclusion Criteria: - Goal B type basilar invagination (BI) Exclusion Criteria: - Preoperative diagnosis was confirmed as not Goal B type basilar invagination (BI) - The patient was not physically fit for surgery.

Study Design


Intervention

Procedure:
Posterior fossa decompression
Posterior fossa decompression:Posterior arch of atlas removal, decompression of cerebellum, detection of foramen magnum.
Posterior Compression-Distraction-Reduction-Fixation
Posterior Compression-Distraction-Reduction-Fixation:After subperiosteal dissection, the facet joint was exposed. A 2-mm joint "scraper" with sharp edge was inserted into the joint capsule and rotated to remove the articular cartilage. A blunt-edged rotating distractor was then inserted into the joint space, and the facet was sequentially opened with larger and larger blunt rotating distractors. After distraction on one side, an appropriate-sized trial was placed into the contralateral facet, holding the distraction open. This was repeated back and forth with larger trials. These steps were repeated, and the facet joints were distracted up to the pre-planned distance of the odontoid tip above Chamberlain's line.

Locations

Country Name City State
China Xuanwu Hospital Beijing Beijing

Sponsors (1)

Lead Sponsor Collaborator
Xuanwu Hospital, Beijing

Country where clinical trial is conducted

China, 

Outcome

Type Measure Description Time frame Safety issue
Primary JOA Score(Japanese Orthopaedic Association Scores) Changes in JOA score,from 0 to 17, higher scores means better outcome 1 months, 3 months, and 6 months postoperatively
Primary NDI Score Changes in NDI score,from 0% to 100%,higher scores means worse outcome 1 months, 3 months, and 6 months postoperatively
Secondary Change of Basilar Invagination Radiographic assessment of the reduction of basilar invagination, using distance from odontoid tip to Chamberlain's line (DCL) 1 months, 3 months, and 6 months postoperatively
Secondary Change of CCA Radiographic assessment of the change in clivus-canal angle (CCA) 1 months, 3 months, and 6 months postoperatively
Secondary Change of CVJ triangle area Radiographic assessment of the reduction of CVJ triangle area 1 months, 3 months, and 6 months postoperatively
Secondary Change of CMA Radiographic assessment of change of cervico-medullary angle (CMA) 1 months, 3 months, and 6 months postoperatively
Secondary Change of subarachnoid space Radiographic assessment of the relief of width of subarachnoid space 1 months, 3 months, and 6 months postoperatively
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