A lumbar laminectomy is a surgical procedure that is also known as an open decompression. The procedure is designed to relieve the pressure that is on the spinal nerve or spinal cord by opening or widening the spinal canal. During the procedure, the lamina which is a small section of the bone on the spine is removed so that there is more room for the nerves. An open decompression, or lumbar laminectomy is typically suggested by a physician for those patients who suffer from back pain caused by neural impingement. The surgical procedure relieves the pressure by enlarging the spinal canal.