The pedicle subtraction osteotomy (PSO) is typically performed at L3 as these vertebrae are the normal apex of lumbar lordosis. It is also safer to perform the osteotomy at one of these levels, as they are caudad to the conus medullaris. The technique involves a transpedicular vertebral wedge resection extending from the posterior elements ...

2024年9月1日 · Lastly, L5 PSO is indicated in stiff convex coronal malalignment for the correction of the lumbosacral fractional curve (type 2A2 of the Obeid-Coronal Malalignment classification) and lumbosacral congenital anomalies with oblique take-off …

2014年5月7日 · Pedicle subtraction osteotomy (PSO) consists of creating posteriorly trapezoidal shape of a vertebra, usually L3 or L4, in order to recreate lordosis in the lumbar spine. It is usually indicated to treat rigid kyphotic lumbar spine associated with sagittal imbalance and due to degenerative changes or to iatrogenic flat back.

2024年11月1日 · Pedicle subtraction osteotomy (PSO) is effective for correcting spinal malalignment but is associated with high complication rates. The biomechanical effect of different PSO levels remains unclear, and no finite element (FE) analysis has compared L2-, …

腰椎后凸患者适合在l2/l3进行pso，而l1/l2 pso适用于腰椎前凸患者。 与此同时，另外一项评价PSO治疗强直性脊柱炎合并胸腰椎后凸的矢状参数和临床结局的研究指出，PSO是治疗强直性脊柱炎合并胸腰椎后凸患者的实用方法，并且建议腰椎后凸患者选择在L3水平行PSO ...

2021年2月5日 · For patients with lumbar kyphosis, PSO is recommended at L2 or L3. The preoperative sagittal imbalance is often severe in such patients, which means a greater correction is needed to achieve a satisfactory outcome. The adult spinal cones terminate at L2, and a lower level of osteotomy can reduce the risk of spinal cord injury.

2014年12月9日 · Lumbar pedicle subtraction osteotomy (PSO) is indicated in the treatment of large sagittal (more than 25° of rigid loss of lordosis) deformities of the lumbar spine or its combination with coronal deformity, especially when they are rigid.

2017年3月17日 · pso 最常用于 l2、l3 处的畸形，适用于锐角状畸形，一般可以矫正 30°，神经并发症发生率平均为 3-8%。 需要能够观察到脊柱的半脱位情况；双平面畸形患者可以通过单侧或双平面 PSO 非对称性地移除椎弓根完成。

2024年8月4日 · Background: Pedicle subtraction osteotomy (PSO) is effective for correcting spinal malalignment but is associated with high complication rates. The biomechanical effect of different PSO levels remains unclear, and no finite element (FE) analysis has compared L2-, L3-, L4-, and L5-PSOs.

单节段Smith-Petersen截骨(Smith-Petersen osteotomy，SPO)后方截骨微店截掉1mm骨质，矢状位上就可纠正1°;而单节段经椎弓根楔形截骨(pedicle subtraction osteotomy，PSO)最大可以矫正后凸达30°~40°。