2024年6月3日 · The degenerative loss of lumbar lordosis commonly occurs in the distal lumbar region and two thirds of the lumbar lordosis are located between L4 and S1 , therefore it seems more logical to target the distal lumbar area when correcting sagittal malalignment by performing the PSO at the level of L4 or L5.

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 …

A pedicle subtraction osteotomy (PSO) is a surgical procedure used in adults and children to correct certain deformities of the spine. A spine with too much kyphosis (forward curvature, or “hunchback”) or too little lordosis (inward curvature, or “swayback”) can be corrected with a PSO.

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-, …

PSO at the level of L4 or L5 remains a challenging technique but with an acceptable rate of complications and revisions. It enables correction of fixed sagittal malalignment in ASD patients with a globally satisfactory outcome. In comparison with L4 PSO, L5 PSO patients did not show PJK as a mechani …

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 ...

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.

2014年12月9日 · A secondary adult lumbar degenerative scoliosis with spondylolysis and—listhesis grade I at L5/S1 with root irritation at L5 and L4 (LL 27°, PI 44°) was observed. A short lumbar fusion from L2 to S1 with a L4 PSO was performed, to restore an adequate lumbar lordosis (52°) in relation to PI

2024年11月12日 · Pedicle subtraction osteotomy (PSO) is a technically complex procedure that is effective at improving the sagittal profile in spinal deformity surgery. This case report describes a 64-year-old man with a history of ten previous spinal surgeries, including failed T10-pelvis posterior spinal fusion, undergoing revision with L4 PSO.

Indication: 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. Indication should be based on careful assessment of the severity of symptoms, functional ...