287. T1 tilt and clavicle angle are the best predictors of postoperative shoulder balance in AIS patients: a review of 347 cases

Abstract

BACKGROUND CONTEXT Shoulder imbalance after PSF is a major concern. Most studies have analyzed multiple radiographic parameters associated with postop uneven shoulders. However, there is paucity in the literature analyzing predictors for balanced shoulders. PURPOSE This study evaluated XRs of AIS patients who underwent PSF, and control patients (no spinal curvature) to identify radiographic predictors of shoulder balance. STUDY DESIGN/SETTING Ambispective review. PATIENT SAMPLE A total of 347 AIS patients that underwent PSF. OUTCOME MEASURES T1 tilt, clavicle angle, radiographic shoulder height (RSH). METHODS Radiographic shoulder height (RSH) was used as our proxy for shoulder height. RSH RESULTS Part I: 211 control patients were evaluated. Of these, 191 had normal RSH and 20 were abnormal. T1 tilt (2.0 vs 4.1) and CA (1.1 vs 4.95) were significantly different between the two groups (p CONCLUSIONS Restoring shoulder balance in AIS patients is a challenging aspect of surgery. We found that restoring the CA FDA DEVICE/DRUG STATUS This abstract does not discuss or include any applicable devices or drugs.