Is Outpatient Anterior Lumbar Fusion (ALIF) Safe? An Analysis of 30-day Outcomes.

STUDY DESIGN

Review of publicly available database.

OBJECTIVE

To compare 30-day outcomes of single-level ALIF procedures performed in outpatient and inpatient settings.

SUMMARY OF BACKGROUND DATA

Despite a growing interest in performing standalone anterior lumbar interbody fusions (ALIFs) as an outpatient procedure, no study has evaluated the safety or efficacy of this procedure outside an inpatient setting.

METHODS

The 2012-2017 American College of Surgeons-National Surgical Quality Improvement Program (ACS-NSQIP) was queried using CPT code 22558 to identify patients undergoing a single-level ALIF. Patients receiving concurrent posterior lumbar surgery/fusion/instrumentation, pelvic fixation, or surgery due to tumor, trauma and/or deformity were excluded to capture an isolated cohort of patients receiving single-level standalone ALIFs. A total of 3728 single-level standalone ALIFs were included in the study. Multivariate regression analyses were used to compare 30-day adverse events and readmissions while controlling for baseline clinical characteristics.

RESULTS

Out of a total of 3728 ALIFs, 149 (4.0%) were performed as outpatient procedure. Following adjustment, outpatient ALIFs versus inpatient ALIFs had lower odds of experiencing any 30-day adverse event (2.0% vs. 9.2%, OR 0.24 [95% CI 0.08-0.76]; P =0.015). No significant differences were noted with regard to severe adverse events 9p=0.261), minor adverse events 9p=0.995), and readmission rates ( P =0.95).

CONCLUSION

On the basis of the results of the study, it appears that ALIFs may be carried out safely in an outpatient setting in an appropriately selected patient population.