1611. Is there a difference in early outcomes between stand-alone lateral lumbar interbody fusions versus lateral lumbar interbody fusions with posterior supplemental fixation?
Authors: Sohrab Virk; Avani Vaishnav, MBBS; Steven McAnany, MD; Todd Albert, MD; Sravisht Iyer, MD; Catherine Himo Gang, MPH; Sheeraz Qureshi, MD, MBA (New York, NY)
The aim of this study was to find the difference in short term outcomes for patients undergoing lateral interbody fusion (LLIF) with or without posterior supplemental fixation.
We performed a retrospective review of patients treated with a LLIF procedure between 2017-2018. We tracked patients for the need for revision surgery during short term follow up. Radiographs and cross-sectional imaging were examined for pre-operative, immediate post-operative and final neuroforaminal height. A student’s t-test was used to compare values from the stand-alone cohort and the cohort of patients with supplemental posterior fixation.
There were 29 patients that met our inclusion criteria. There were 12 patients in the stand-alone LLIF (SA-LLIF) cohort and 17 patients in the LLIF with posterior fixation cohort (LLIF-PF). The average age and BMI for the SA-LLIF was 61.8 +/- 12.9 years and 26.5 +/- 2.9 kg/m^2 respectively. The average and BMI for the LLIF-PF cohort was 58.6 +/- 2.4 years and 29.1 +/- 5.9 kg/m^2 respectively. The average follow-up was 5.1+/- 2.8 months. In both groups there was a statistically significant increase in neuroforaminal height between pre-operative and final measurements (SA-LLIF – 16.7 +/- 3.5 to 20.1 +/- 4.4 mm, p < 0.001 and LLIF-PF – 14.7 +/- 2.9 to 17.9 +/- 4.3 mm, p < 0.001). There was a statistically significant decrease in VAS back (6.1 +/- 2.5 versus 3.6 +/- 2.3, p = 0.007) and leg scores (5.3 +/- 2.8 versus 3.1 +/- 2.4, p = 0.04) in the SA-LLIF cohort.
Stand-alone LLIF constructs is a viable treatment option for patients with back/leg pain from symptomatic disc herniations or degeneration. In this series of patients with short term follow up, stand alone constructs perform equivalently to patients with LLIF and posterior fixation.