Preventive Effect of Limited Decompression on Adjacent Segment Following Posterior Lumbar Interbody Fusion

This surgical study evaluates whether performing a limited decompression at the spinal segment adjacent to a lumbar fusion — while the fusion itself is being done — can prevent or delay the development of adjacent segment disease. Adjacent segment disease is a recognized complication after spinal fusion, where the discs and joints next to the fused level degrade faster. This proactive approach may reduce the likelihood of needing another operation in the future. You may be eligible if... - You have lumbar spinal stenosis requiring surgery at the L4-S1 level - You have asymptomatic narrowing of the spinal canal at the adjacent segment (L3/L4) - You have not responded to at least 8 weeks of conservative treatment You may NOT be eligible if... - You have spinal instability at the adjacent segment - You have significant spinal imbalance - You have spinal infection or tumors - You have had a previous lumbar fusion surgery Talk to your spine surgeon if you are scheduled for lumbar fusion and are concerned about the long-term health of adjacent spinal levels. This preventive surgical approach is being studied to help reduce future operations.