Abstract
There are a few studies on the postoperative changes in sagittal alignment and corresponding factors, including hand grip strength (HGS) and muscle performance tests for lumbar spinal stenosis (LSS). Thus, we aimed to determine whether HGS can be a surrogate marker for global sagittal alignment changes after decompression with fusion surgery for LSS. This retrospective observational study included 91 patients who underwent spine fusion surgery for LSS. Radiological spinopelvic parameters, including sagittal vertical axis (SVA), lumbar lordosis (LL), pelvic tilt (PT), pelvic incidence (PI), global tilt (GT), and T1 pelvic angle (T1PA), were analyzed preoperatively and 1 year after posterior decompression and fusion surgery. To assess muscle performance, the 6-m walk (SMT), timed up and go (TUGT), and sit-to-stand (STS) tests were conducted. The relationship between HGS and postoperative SVA was examined through multiple linear regression analysis. Additionally, the relationship between HGS and preoperative/postoperative radiologic spinopelvic parameters and muscle performance test results was analyzed through Pearson's correlation. HGS was significantly correlated with age, preoperative and postoperative SVA, and the muscle performance tests. Furthermore, HGS was a factor that can significantly influence postoperative SVA changes in multiple linear regression analyses. Therefore, HGS may be a good predictor of postoperative SVA change.
Highlights
There are a few studies on the postoperative changes in sagittal alignment and corresponding factors, including hand grip strength (HGS) and muscle performance tests for lumbar spinal stenosis (LSS)
No patient was diagnosed with hand and wrist-related diseases or cervical spine problems, and all patients were identified for instability or a need for resection > 50% of the facet joints owing to foraminal stenosis and degenerative spondylolisthesis of > grade 2 7,8
No significant differences were observed in sagittal vertical axis (SVA), lumbar lordosis (LL), pelvic tilt (PT), sacral slope (SS), pelvic incidence (PI)-LL, thoracic kyphosis (TK), thoracolumbar kyphosis (TLK), global tilt (GT), and T1 pelvic angle (T1PA) or history of falling
Summary
There are a few studies on the postoperative changes in sagittal alignment and corresponding factors, including hand grip strength (HGS) and muscle performance tests for lumbar spinal stenosis (LSS). The relationship between HGS and preoperative/postoperative radiologic spinopelvic parameters and muscle performance test results was analyzed through Pearson’s correlation. HGS was significantly correlated with age, preoperative and postoperative SVA, and the muscle performance tests. LSS is significantly associated with sarcopenia, and the conditions tend to coexist[4] Driven by this trend, there have been several attempts to estimate which factors could affect LSS treatment outcomes, such as spinopelvic parameters and other tools of clinical outcomes[5,6]. This study aimed to examine the relationship between radiologic spinopelvic parameters (after the surgical treatment of patients with LSS) and skeletal muscle function, that is, the results of HGS and muscle performance tests
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