5-429.m1:

You have had treatment on your oesophagus because gastric acid had got into your oesophagus.

The oesophagus or gullet connects the mouth with the stomach. It is a muscular tube. The muscles in the oesophagus move food into the stomach. The oesophagus is usually closed by a sphincter muscle at the junction to the stomach. This is meant to prevent the stomach contents and gastric acid being regurgitated into the oesophagus. Only during swallowing does the oesophagus briefly open its sphincter muscle to the stomach.

The treatment involved inserting a tube through your mouth and pushing it to your oesophagus. At the end of the tube was the camera. This camera sent images to a screen during the treatment. The tube could then also be used to push small instruments through. To prevent gastric acid from flowing into your oesophagus, a drug or other fluid was injected into the wall of your oesophagus.