Describe a double balloon endoscopy

Endoscopy is a non surgical procedure that is performed to examine and view the digestive tract through an endoscope--a flexible tube with light and camera.

Double balloon endoscopy is done by fitting a 200 cm long flexible, fiberoptic endoscope with an overtube that slides the full length of the endoscope. One balloon that can be inflated or deflated  is placed at the tip of the overtube. Another balloon is located at the tip of the endoscope. Both balloons can be alternatively inflated to anchor the overtube or the endoscope to assist with the passage of either the overtube or endoscope.

The answer is Endoscopy is a non surgery that is performed to  

Explanation:

look at and see the stomach related tract through an endoscope- - an adaptable tube with  light and camera.  Twofold inflatable endoscopy is finished by fitting a 200 cm long adaptable, fiber optic endoscope with an over tube that slides the full length of the  endoscope. One inflatable that can be expanded or collapsed  is put at the tip of the overture. Another  swell is situated at the tip of the endoscope. The two inflatables can be  on the other hand swelled to grapple the over-tube or the endoscope to help with the  entry of either the over tube or endoscope.

i don't think so because different teachers have different materials. tehy teach differently, unless you know for sure your teacher is the exact same as others. i would just contact ur teacher