55. Do elderly patients have higher risk of complications and reoperations with MIS deformity surgery

BACKGROUND CONTEXT Evidence suggests that increasing age raises the risk for higher complications with traditional open deformity surgery. The decreased exposure related morbidity associated with minimally invasive surgery (MIS) has the potential to lower the complication profile in older surgical patients. PURPOSE To evaluate the impact of age on complications and reoperations. STUDY DESIGN/SETTING Prospective outcomes registry. PATIENT SAMPLE A total of 142 patients. OUTCOME MEASURES Complications and reoperations. METHODS Inclusion criteria included age ≥ 18 years, and at least one of the following criteria: coronal curve (CC) ≥ 20°, sagittal vertical axis (SVA) > 5 cm, pelvic tilt (PT) > 25°, or thoracic kyphosis (TK) > 60°. Complications (major/minor) and reoperations were collected. A total of 142 patients who underwent circumferential MIS surgery were divided into younger (≤65 yrs, N=45) and older (>65 yrs, N=97) groups. Chi-square and t-test analyses were performed. RESULTS Mean age was 57 years (SD±10) in the younger and 73.7yrs (SD±4.8) in the older groups (p CONCLUSIONS Despite significantly more comorbidities, total complications were not higher in elderly patients undergoing MIS surgery. However, elderly patients were found to have a higher reoperation rate, with PJK and instrumentation failure/mal-positioning being the most frequent reasons. FDA DEVICE/DRUG STATUS This abstract does not discuss or include any applicable devices or drugs.