Labelle H, Dansereau J, Bellefleur C, de Guise J, Rivard C H, Poitras B
Pediatric Research Center, Hôpital Ste-Justine, University of Montreal, Quebec, Canada.
Spine (Phila Pa 1976). 1995 Jun 15;20(12):1406-9.
A peroperative measurement technique based on magnetic fields was used to document the thoracic and lumbar vertebral changes induced by derotation of the concave rod during corrective surgery of idiopathic scoliotic deformities with Cotrel-Dubousset instrumentation.
Objective was to accurately document the immediate changes induced by the derotation maneuver to gain a better understanding of its effect on curve correction during a surgical procedure.
Accurate peroperative documentation of these three-dimensional changes was very limited, and the exact contribution of the derotation maneuver in the entire process of correction of a scoliotic deformity was still poorly understood.
A digitizer using magnetic fields was used to record the three-dimensional orientation and x, y, and z coordinates of the tip of every spinous process exposed at surgery before and after derotation of the concave rod in a group of 22 female patients with idiopathic scoliosis.
A significant improvement of the scoliotic deformity was noted in the frontal plane, and improvement of thoracic hypokyphosis and lumbar hypolordosis in the sagittal plane was seen. Vertebral axial rotation remained unchanged.
The derotation maneuver is effective in achieving three-dimensional correction of idiopathic scoliosis, but vertebral axial derotation is not an important component of this correction.
采用一种基于磁场的术中测量技术，记录在使用Cotrel-Dubousset器械对特发性脊柱侧凸畸形进行矫正手术时，凹侧棒旋转所引起的胸腰椎椎体变化。
目的是准确记录旋转操作引起的即时变化，以便更好地理解其在手术过程中对畸形矫正的影响。
关于这些三维变化的准确术中记录非常有限，并且在脊柱侧凸畸形矫正的整个过程中，旋转操作的确切作用仍了解甚少。
在一组22例特发性脊柱侧凸女性患者中，使用基于磁场的数字仪记录在凹侧棒旋转前后手术中暴露的每个棘突尖端的三维方向以及x、y和z坐标。
在额状面观察到脊柱侧凸畸形有显著改善，矢状面观察到胸椎后凸减少和腰椎前凸减少有所改善。椎体轴向旋转保持不变。
旋转操作对于实现特发性脊柱侧凸的三维矫正有效，但椎体轴向旋转并非此矫正的重要组成部分。
