Information for patients

Digestive endoscopy has rapidly gained a dominant role in the evaluation of digestive tract diseases. The video endoscope which is equipped with a camera transmits optimal quality images of the internal organs. The most commonly practiced examinations are gastroscopy and colonoscopy. At Hôpital de La Tour, endoscopies are carried out under light sedation in specially equipped endoscopy suites affiliated to gastroenterologists, which respect the strictest hygiene standards. Endoscopies  may also be carried out in some cases under general anaesthetic in the operating theatre.


This examination is prescribed for diagnosing disorder of the oesophagus, stomach and duodenum, such as reflux oesophagitis, hiatus hernia, gastritis, gastro-duodenal ulcers and cancers. 


This examination is prescribed mainly for diagnosing polyps and cancer of the colonr, as well as for chronic inflammatory diseases of the intestines such as Crohn's Disease and Ulcerative Colitis.


These allow the performance of tissue biopsies, which are then analysed in a pathology laboratory. They also allow the removal of polyps (polypectomy) using electrocoagulation.

Pratical examination performed


An examination which helps to visualise the inside of the oesophagus, the stomach and duodenum using a supple, flexible tube fitted with a camera. This examination lasts around 10 to 15 minutes, but the whole procedure takes around an hour.

You will be asked to have been on a strict fasting regimen (no food or drink) six hours before the examination.

You may take your usual medication with a very small sip of water.

We are available for any further information you may require about your examination. 


An examination which helps to visualise the inside of the large intestinethrough the introduction of a supple, flexible tube fitted with a camera. This examination lasts around 20 to 30 minutes, but the whole procedure takes around two hours.

The following will be sent to your home:a preparation protocol to follow, a "residue-free diet" to follow for three days before the examination, medication, a prescription for a blood test as well as a prescription for a colonic cleansing solution to be taken the day before and on the morning of the examination.

Endoscopic capsule

An examination which explores the whole small intestine. 

Any iron replacements should be stopped eight days before the examination.

You will have to swallow a miniature video camera contained inside a capsule. This will allow colour video images to be projected for eight hours.

You must have kept to a strict fasting regimen.

Sensors will be applied to your abdomen. You will wear a belt with straps fitted with sensors and receivers that you will have to bring back eight hours after the ingestion of the capsule (wear loose-fitting clothing).

The capsule will be evacuated naturally.

Endoscopic retrograde cholangiopancreatography (ERCP)

ERCP is an endoscopic procedure used to examine the drainage routes (ducts) of the liver and pancreas into the bowel. The ones that drain the liver and gallbladder are called bile ducts. The one that drains the pancreas is called the pancreatic duct. The bile and pancreatic ducts join together just before they drain into the small bowel. The drainage opening is called the papilla. The papilla is surrounded by a circular muscle, called the sphincter of Oddi. A catheter can be inserted into the papilla and dye can be injected in order to visualize the biliairy or pancreatic ducts. This access allows your doctor to perform necessary treatments such removal of gallstones in the bile duct or the insertion of a stent to drain the ducts when there is a conditions causing obstruction.

Endoscopic ultrasonography (EUS)

EUS is performed using a thin, flexible tube called an endoscope that has a built-in miniature ultrasound probe which then uses sound waves to create visual images. This probe can be inserted from the mouth or the anus and allows your doctor to examine your esophageal and stomach linings as well as the walls of your upper and lower gastrointestinal tract respectively. EUS is also used to study other nearby organs including the lungs, liver, gall bladder and pancreas.

EUS provides your doctor with detailed images of your digestive tract. It can provide specific information concerning conditions that cause abdominal pain or loss of weight. It can also examine known abnormalities, including lumps or lesions, which were detected at a prior endoscopy or were seen on computed tomography (CT) scan. EUS provides a detailed image of the lump or lesion, and can also allow a fine needle sampling when required. EUS can be used to diagnose diseases of the pancreas, bile duct and gallbladder when other tests are inconclusive. It can provide internal access for the drainage of collections or biliary drainage.


Administrative department

On the request of your family doctor or on your own initiative, our administrative department will arrange an appointment for you and will provide information on how to best prepare for your forthcoming examination.

Your calls will be answered:

on Mondays, Tuesdays and Thursdays from 9am to 11am and from 2pm to 4pm.

on Wednesdays and Fridays from 9am to 11am.

Office of Dr X. Troillet: tél. +41 22 309 45 90

Office of Dr E.-L. Leung Ki: tél. +41 22 719 74 60

Last modified on December 18th, 2015.

Unless specified otherwise, this text has been written by the editorial team.

Our specialists

Hôpital de La Tour

Dr François-Xavier Troillet +41 22 719 67 56
Dr med. Michael Drepper +41 22 719 77 52
Leung Ki En-Ling +41 22 719 74 60

Hors Campus