Indirect Decompression Using Lateral Lumbar Interbody Fusion for Restenosis after an Initial Decompression Surgery

Area of Science:

• Spine surgery
• Orthopedics
• Neurosurgery

Background:

• Degenerative lumbar diseases often require neural decompression.
• Indirect lumbar decompression using LLIF is established for these conditions.
• Limited research exists on LLIF for restenosis post-lumbar decompression.

Purpose of the Study:

• To compare clinical and radiographical outcomes of LLIF versus PLIF for lumbar decompression revision surgery in restenosis patients.
• To evaluate the effectiveness and safety of LLIF in this specific surgical context.

Main Methods:

• Retrospective comparative study of 52 patients with lumbar interbody fusions for restenosis with spondylolisthesis.
• 15 patients underwent LLIF with posterior fixation; 37 underwent PLIF.
• Comparison of Japanese Orthopaedic Association (JOA) scores, perioperative complications, and thecal sac cross-sectional areas.

Main Results:

• LLIF group had significantly shorter operative time (115.3 min vs. 186.2 min) and lower blood loss (58.2 mL vs. 303.2 mL) compared to PLIF.
• LLIF group had transient lateral thigh weakness (13.3%); PLIF group had higher complication incidence (18.9%) including durotomy, infection, and neurological deterioration.
• Both groups showed significant improvement in JOA scores.

Conclusions:

• LLIF offers acceptable clinical and radiographical outcomes for revision surgery in restenosis with spondylolisthesis.
• No revision-surgery-specific complications were observed with LLIF.
• LLIF appears to be a safe and minimally invasive alternative for revision surgery.