Instrument for performing spinal endoscopy. Above, at the top right, a thin surgical tool has been inserted into a narrow metal tube, exiting at the bottom left. Below, in a magnified view of the tip of the tube, the widest opening is the one through which the surgical tool emerges. Two other channels irrigate and the surgical area and drain the water. The tube also contains a micro-miniaturized camera and light source to show the surgeon what is happening in the surgical area.