Clinical and Radiological Outcomes of CorrectiveSurgery on Adult Spinal Deformity Patients: Comparison ofShort and Long Fusion

Despite the accumulated knowledge of spinal alignment and clinical outcomes the full corrective surgery cannot be applied to allthe deformity patients as it requires considerable surgical burden to the patients. The aim of this study was to investigate the clinicaland radiological outcomes of the patients who have received short and long fusion for ASD. A total of 21 patients who receivedsurgical reconstructive spinal fusion procedures and were followed up for at least one year were retrospectively reviewed. Sixteencases have received spinal corrective surgery that upper instrumented vertebrate (UIV) was thoracic level (group T), or 5 cases werewith UIV in lumbar level (group L). Group L had shorter operation time, smaller intraoperative estimated blood loss, and shorterpostoperative hospitalization days. Group T tends to improve more in the magnitude of VAS of lumbar pain compared to group L.Improvement of spinal alignment revealed the advantage of long fusion compared to short fusion, in Cobb angle, sagittal verticalaxis (SVA), lumbar lordosis (LL), PI-LL C7 plum line (C7PL), and center sacral vertebral line (CSVL). Pelvic tilt (PT) did not differbetween the groups. Disc lordosis was the most acquired in XLIF compared to TLIF and PLF and maintained one year. There were9 adverse events, 3 cases of pulmonary embolism (PE), one case ofdelirium, and 6 cases of proximal junctional kyphosis. Currentstudy elucidated that long fusion, UIV, is thoracic and can achieve better spinal alignment compared to short fusion, UIV, in lumbar.XLIF demonstrated strong ability to reconstruct the deformity on intervertebral space that is better to apply as much intervertebralspace as possible. For the ASD patients with complications, short fusion can be one of the options