Comparative Analysis of Inpatient Opioid Consumption Between Different Surgical Approaches Following Single Level Lumbar Spinal Fusion Surgery.

Study Design: Single-center retrospective cohort study.

Objectives: To evaluate inpatient MME administration associated with different lumbar spinal fusion surgeries.

Methods: Patients ≥18 years of age with a diagnosis of Grade I or II spondylolisthesis, stenosis, degenerative disc disease or pars defect who underwent one-level Transforaminal Lumbar Interbody Fusion (TLIF) or one-level Anterior Lumbar Interbody Fusion (ALIF) or Lateral Lumbar Interbody Fusion (LLIF) through traditional MIS, anterior-posterior position or single position approaches between L2-S1. Outcome measures included patient demographics, surgical procedure and approach, perioperative clinical characteristics, incidence of ileus and inpatient MME. Statistical analysis included one-way ANOVA with a post-hoc Tukey Test and Kruskal-Wallis Test with post-hoc Mann-Whitney test. MME was calculated as per the Centers for Medicare and Medicaid Services and previous literature. Significance set at < .05.

Results: Mean age differed significantly between MIS TLIF (55.6 ± 12.5 years) and all other groups (Open TLIF 57.1 ± 12.5, SP ALIF/LLIF 57.9 ± 9.9, TP ALIF/LLIF 50.9 ± 12.7, Open ALIF/LLIF 58.4 ± 15.5). MIS TLIF had the shortest LOS compared to all groups except SP ALIF/LLIF. Total MME was significantly different between MIS TLIF and Open ALIF/LLIF (172.5 MME vs 261.1 MME, = .044) as well as MIS TLIF and TP ALIF/LLIF (172.5 MME vs 245.4 MME, = .009). There were no significant differences in MME/hour and incidence of ileus between all groups.

Conclusion: Patients undergoing MIS TLIF had lower inpatient opioid intake compared to TP and SP ALIF/LLIF, as well as shorter LOS compared to all groups except SP ALIF/LLIF. Thus, it appears that the advantages of minimally invasive surgery are seen in minimally invasive TLIFs.