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 and 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 > 15° and/or vertebral translation ≥ 4.5 mm 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.