One method of widening a narrowed spinal canal is through laminectomy. This procedure consists in cutting out the vertebral arch plates together with the spinous process limiting the canal space from the back side. In a hemilaminectomy, the surgeon cuts the arch lamina on one side of the spinous process (right or left). If necessary, bone growths are removed and the intervertebral holes are deepened. The treatment allows you to decompress the pressed nerve roots or the spinal cord and relieve pain.