Unilateral Biportal Endoscopy (henceforward referred to as ‘UBE’) is a modified Percutaneous Endoscopic assisted Decompression procedure. The procedure is done under General or Regional anesthesia. It is best suited for patients having chronic Lumbar canal stenosis, with neurogenic claudication (reduced walking distance due to pressure on spinal nerves). UBE involves making 2 skin holes(4mm, and 15 mm each) which are used to insert Endoscope and spinal instruments respectively. The whole procedure is done under continuous irrigation and high magnification, making is very safe and efficient compared to open or microscopic spine surgery. Since it is a percutaneous procedure there is minimal injury to the surrounding normal muscles and tissues, this leads to faster recovery, less post-operative pain and early mobilization of the patient.