Prospective Evaluation of Complex Adult Spinal Deformity (CAD) Treated With Minimally Invasive Surgery (MIS)
Evaluate surgical treatment outcomes and identify best practice guidelines for complex adult spinal deformity (ASD) patients treated with minimally invasive approach, including radiographic and clinical outcomes, surgical and postoperative complications, risk factors for and revision surgery rates, and the role of standard work to improve patient outcomes and reduce surgical and postoperative complications.
• 1\. \>18 years of age at the time of treatment 2. Diagnosis of adult congenital, degenerative, idiopathic, neuromuscular, inflammatory or iatrogenic spinal deformity 3. EOS full body or standing 36 AP \& Lateral images of entire spine 4. Surgery to be schedule to take place within 6 months (otherwise PROMs/Radiographic images to be recollected) 5. Surgery to include \> 3 levels percutaneous posterior spinal instrumentation or 3 level stand-alone lateral 6. And any one of the following:
• a. Radiographic criteria incorporating percutaneous posterior spinal instrumentation: i. PI-LL ≥ 25 degrees ii. Thoracolumbar/lumbar scoliosis ≥ 20 degrees iii. SVA \>10cm iv. PT \> 30 b. Procedural criteria: i. Single-position surgery ≥ 3 levels fused (Levels=vertebra; S1 is counted as a level; S2 \&/or pelvis/ilium is not) ii. Staged ≥ 3 levels fused with percutaneous pedicle screws iii. 3 column osteotomy with percutaneous fixation iv. ACR incorporating open or percutaneous fixation