Overview
A single-center, prospective cohort trial aims to provide stronger evidence regarding the impact of degenerative spondylolisthesis on the clinical outcome of unilateral biportal endoscopy for lumbar spinal stenosis
Eligibility
Inclusion Criteria:
- Age range: 50-80 years
- Diagnosis of LSS affecting 1-2 vertebral levels
- Predominant manifestation of neurogenic intermittent claudication, with ineffective conservative treatment for at least 3 months
- Presence of lumbar DS of less than grade II or absence of spine instability
- Willingness to participate in the study and complete follow-up assessments.
Exclusion Criteria:
- Diagnosis of isthmic lumbar spondylolisthesis or lumbar DS of grade ≥II
- Evidence of instability at the affected vertebral level (intervertebral angle change exceeding 15° in standing flexion-extension radiographs of the lumbar spine)
- History of prior surgery at the affected vertebral level
- Presence of scoliosis with a Cobb angle > 20º
- Presence of other conditions affecting the lumbar spine (infection, tumor, fracture, neurological diseases, and others)
- Medical disorders that preclude surgical tolerance
- Participation in other clinical research projects related to the treatment of lumbar spinal stenosis.