| 摘要 |
<p>Described herein are endoscopic guide tube devices, systems and methods for using the guide tubes to facilitate insertion of an endoscope into a body cavity. The device may include a pressurization chamber having a nozzle, an everting tube mounted within the pressurization chamber, and a valve located at or proximate the distal end of the everting tube. The valve can be configured to open when the everting tube is fully deployed. A tether can be attached to the distal end of the everting tube to restrain the everting tube from fully deploying until a release mechanism is engaged. The valve can be formed from two sheets that are adjacent to each other and/or can include a viscous gel.</p> |
