Neurogenic intermittent claudication (NIC) secondary to lumbar spinal stenosis (LSS) is a posture-dependent complaint and it typically affects patients at the age of 50 years or older.NIC is defined as pain or numbness in the buttocks, thighs, and/or lower legs caused by decrease of the spinal canal volume and brought on by either prolonged standing or exercise in the erect posture. The symptom is typically relieved by various manoeuvres that flex the lumbar spine, which increases the spinal canal area significantly.Decompressive surgery is the only surgical treatment available for symptomatic lumbar spinal stenosis (LSS). While clinical results can be satisfactory, patients require a long period of recovery and the surgery can result in a high rate of perioperative and postoperative complications. Because many stenosis patients are elderly, they may suffer from co-morbid conditions that can significantly increase their risk of complicationsOther less invasive and less destructive techniques have recently been proposed. Among these are devices inserted between the spinous processes to abolish postural lordosis at the level of the narrowed functional unit.The X-Stop is currently undergoing a prospective study for U.S. Food and Drug Administration approval. This device is implanted between the spinous processes, thus reducing extension at the symptomatic level(s), yet it allows flexion and unrestricted axial rotation and lateral flexion. The major portion of the interspinous ligament is preserved. It is indicated in patients where the symptoms are increased in extension.