Posterior Lumbar Fusion Guidelines

Indications for Fusion

The American Association of Neurological Surgeons recommends lumbar fusion only for 1- or 2-level degenerative disc disease (Grade B recommendation), not extensive multilevel constructs like T10-to-pelvis fusion 1, 2, 3, 4
Fusion may be appropriate for documented spondylolisthesis with instability on dynamic flexion-extension films, but this is not the case for the proposed T10-to-pelvis fusion 5
Refractory degenerative disc disease limited to 1-2 levels after at least 3-6 months of comprehensive conservative management may be an indication for fusion, but not for extensive multilevel constructs 1, 2, 3, 4, 5

A minimum of 3-6 months of comprehensive conservative treatment, including structured physical therapy, appropriate medications, and epidural steroid injections if indicated, is required before considering fusion 5, 6, 7
A formal physical therapy program focusing on core strengthening and flexibility is necessary, not merely patient-directed exercises 5, 7
A trial of neuroleptic medications (gabapentin or pregabalin) for radicular symptoms is recommended 5

Decompression alone is often noninferior to decompression plus fusion for lumbar stenosis, even with spondylolisthesis present 5
Fusion is associated with higher adverse event rates, longer hospital stays, and greater cost without proportional improvement in outcomes for stenosis alone 5

Complication rates increase substantially with multilevel instrumented fusion, particularly in patients with comorbidities like diabetes and hypertension 5
The functional trade-off of complete lumbar spine immobilization must be weighed against potential pain improvement 5

Limited fusion (1-2 levels) at the most unstable or symptomatic segments with decompression at other levels may be a more appropriate option 1, 2, 3, 4