| The natural swallowing action helps the endoscope pass into the gullet and down towards the stomach. |
| Now the endoscope consists of a series of rod lens and objective lens, eyepiece lens and optical fibres for illumination. |
| A lens filter of appropriate laser wavelength may be used over the top of an endoscope viewing port to protect the eye from laser backscatter. |
| There seems to be an unavoidable degree of trauma to both sites despite the surgeon using an endoscope. |
| It is important never to leave a lighted endoscope or light source lying on surgical drapes. |
| The surgeon passes the endoscope through the tube and inspects and confirms proper placement of the tunnel before proceeding. |
