METHOD OF ASSESSING THE PARAMETERS OF THE SAGITTAL SPINAL PELVIC BALANCE
https://doi.org/10.14531/ss2015.3.55-63
Abstract
Objective. To analyze the method of assessing the parameters of the sagittal spinal sacral balance based on geometric evaluation of the lumbar spine and sacrum.
Material and Methods. The study included 100 patients divided into two groups. The study group included 54 patients with lumbar spinal stenosis at the L1-L5 level, and the control group - 46 healthy volunteers. All patients were examined by MRI. Lumbar lordosis was considered as a circular arc and described by both anatomical (lordosis angle) and geometrical (the chord length, the height of the circle segment, the central angle of the segment, and the circular radius) parameters. Two sacral parameters were measured: sacral slope and sacral inclination angles, characterizing the sacrum position in horizontal and vertical planes, respectively.
Results. The study revealed a significant correlation between anatomical and geometrical spinal sacrum parameters. The comparison of the study and control groups revealed significant differences in the parameters of the chord length, the height of the circle segment, and the sacral inclination angle. Two additional parameters were proposed: lumbar coefficient, as a ratio of the lordosis angle and the central angle of the segment; and sacral coefficient, as a ratio of the sacral slope and the sacral inclination angle. A modulus of the mathematical difference between sacral and lumbar coefficients was used to assess spinal sacral balance. Statistically significant differences for proposed coefficients were detected between groups.
Conclusion. The proposed method demonstrated a high sensitivity for degenerative diseases of the spine and may possess a high prognostic value.
About the Authors
Serik Kaliulovich Makirov
Russian Medical Academy of Postgraduate Education, Moscow, Russia
Russian Federation
Russian Federation
Andrey Anatolyevich Yuz
Russian Medical Academy of Postgraduate Education, Moscow, Russia
Russian Federation
Russian Federation
Mohammed Taher Jahaf
Russian Medical Academy of Postgraduate Education, Moscow, Russia
Russian Federation
Russian Federation
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Review
For citations:
Makirov S.K., Yuz A.A., Jahaf M.T. METHOD OF ASSESSING THE PARAMETERS OF THE SAGITTAL SPINAL PELVIC BALANCE. Russian Journal of Spine Surgery (Khirurgiya Pozvonochnika). 2015;12(3):55-63. (In Russ.) https://doi.org/10.14531/ss2015.3.55-63
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