Is it Really Necessary Going All Over the Top in Patients With Symptomatic Lumbar Spinal Stenosis?

The goal of this clinical trial is to evaluate the theory of epidural pressure by comparing a surgical procedure that aims to perform less bone resection compared to conventional surgery in patients with lumbar spinal stenosis.

The main questions it aims to answer is:

Is bony decompression of the lumbar canal performed until normalization of epidural pressure not inferior to conventional surgery in achieving clinical improvement in patients with symptomatic lumbar canal stenosis?

Researchers will:

Compare conventional open laminectomy to bony decompression of the lumbar canal until normalization of epidural pressure is achieved.

Participants will:

* Be randomized to one of the two surgical interventions: laminectomy guided by epidural pressure measure or conventional laminectomy. * Visit the clinic for checkups and tests until 1 year of follow-up.