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Chinese Journal of Brain Diseases and Rehabilitation(Electronic Edition) ›› 2021, Vol. 11 ›› Issue (06): 336-342. doi: 10.3877/cma.j.issn.2095-123X.2021.06.004

• Clinical Research • Previous Articles     Next Articles

Clinical significance of Boogaard angle in surgical decision of basilar invagination reduction

Liwei Peng1, Peng Wang1, Wei Zuo1, Chao Cheng1, Fan Yang2, Dong Xiong1, Zilong Mao1, Lei Zhao1, Chi Peng3, Jin’an Zhang1, Lei Zhang1, Weixin Li1,()   

  1. 1. Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi’an 710038, China
    2. Department of Plastic Surgery and Burns, Tangdu Hospital, Fourth Military Medical University, Xi’an 710038, China
    3. Department of Health Statistics, Second Military Medical University, Shanghai 200433, China
  • Received:2021-11-07 Online:2021-12-15 Published:2022-02-09
  • Contact: Weixin Li

Abstract:

Objective

To investigate the quantitative relationship between postoperative Boogaard angle and the improvement rate of patient-reported Japanese Orthopaedic Association(PRO-JOA) score to guide basilar invagination reduction surgery.

Methods

The patients diagnosed with craniocervical junction malformation in the Neurosurgery Department of Tangdu Hospital, Fourth Military Medical University from August 2015 to August 2020 were retrospectively analyzed. Twenty-three radiographic sagittal parameters of craniocervical junction including Boogaard angle were measured, and PRO-JOA score were recorded to assess clinical outcomes. PRO-JOA improvement rate(ΔPRO-JOA) and postoperative radiographic parameters including Boogaard angle in patients with basilar invagination were measured.

Results

A total of 94 patients with basilar invagination were included in the study. Boogaard angle was associated with better outcome in ΔPRO-JOA. Boogaard angle was positively associated with ΔPRO-JOA in the unadjusted model(OR=1.04, 95%CI: 1.00-1.08). In the micro adjustment model (adjusted for age and gender), the results did not change significantly (OR=1.04, 95%CI: 1.01-1.08). In the nonlinear model, there was a positive correlation with ΔPRO-JOA with Boogaard angle<160.8° (correction OR=1.22, 95%CI: 1.03-1.44).

Conclusion

Boogaard angle correction will affect ΔPRO-JOA in patients with basilar invagination and can be used as a quantitative reference for whether basilar invagination reduction surgery is combined with posterior fossa decompression.

Key words: Boogaard angle, Basilar invagination, Posterior fossa decompression, Sagittal parameter

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