The surgical methods of lumbar spinal stenosis treatment + Surgery to remove the lamina - the back part of a vertebra that covers the spinal canal (Laminectomy) + Surgery to remove a part of the bone from both laminae of a single vertebra to decompress (Bilateral laminotomy) + Surgery to decompress the stenosis combined with spinal fixation + Surgery to decompress and support the spine with the interspinous space device Minimally invasive lumbar decompression surgery + Partial facetectomy and split-spinous process laminotomy + Endoscopic lumbar decompression + Microendoscopic unilateral approach for bilateral decompression Based on the unilateral laminotomy techniques for bilateral decompression, described earlier by Spetzger (1997), which allows bilateral decompression under microscope guidance, together with the effectiveness of the tubular surgery, Palmer.