Lumbar spinal stenosis is a series of low back pain and a series of neurological symptoms caused by various forms of narrowing of the spinal canal, neural canal, and intervertebral foramen, as well as soft tissue-induced changes in the volume of the spinal canal and narrowing of the dural sac itself. This is called lumbar spinal stenosis. Because of the narrowing of the spinal canal, the cauda equina nerve in the spinal canal is compressed, resulting in symptoms such as low back pain. If the spinal canal is narrowed laterally, the nerve roots will also be compressed, causing interruption of the axial pulp due to compression; impaired nerve fluid function; relative swelling of the nerve sheath; stimulation of nerve endings; and tissue hypoxia due to obstruction of blood flow; restricted venous return and local stagnation, etc. These constitute the causes of low back pain.
Lumbar spinal stenosis refers to the abnormal structure of the spinal canal caused by primary or secondary factors, narrowing of the spinal canal cavity, and the emergence of low back and leg pain mainly characterized by intermittent claudication.