Upper gastrointestinal (GI) endoscopy and colonoscopy (combined)

What is an upper GI endoscopy and colonoscopy?

An upper gastrointestinal (GI) endoscopy is a procedure to look at the inside of your oesophagus (gullet), stomach and duodenum using a flexible telescope (see figure 1).

A colonoscopy is a procedure to look at the inside of your large bowel (colon) using a flexible telescope.

What are the benefits of an upper GI endoscopy and colonoscopy?

Your doctor is concerned that you may have a problem in your digestive system. An upper GI endoscopy and colonoscopy is a good way of finding out if there is a problem.

Upper GI gastrointestinal endoscopy and colonoscopy diagram

Are there any alternatives to an upper GI endoscopy and colonoscopy?

A barium meal is an x-ray test of your upper digestive system.

Alternatives to a colonoscopy include a barium enema (an x-ray test of your large bowel) or a CT colography (a scan of your large bowel).

What does the procedure involve?

An upper GI endoscopy and colonoscopy usually takes about an hour.

If appropriate, the endoscopist may offer you a sedative or painkiller.

The endoscopist will place a flexible telescope (endoscope) into the back of your throat and down into your stomach. From here the endoscope will pass into your duodenum.

A colonoscopy involves placing a flexible telescope into your back passage and blowing some air into your large bowel to get a clear view.

The endoscopist will be able to look for problems such as inflammation, ulcers or polyps. They will be able to perform biopsies and take photographs to help make the diagnosis.

What complications can happen?

  • Sore throat
  • Breathing difficulties or heart irregularities
  • Allergic reaction
  • Infection
  • Blurred vision
  • Making a hole in your oesophagus, stomach, duodenum or colon
  • Damage to teeth or bridgework
  • Bleeding
  • Incomplete procedure

How soon will I recover?

If you were given a sedative, you will usually recover in about two hours.

You may feel a bit bloated for a few hours but this will pass.

You should be able to return to work the next day unless you are told otherwise.

The healthcare team will tell you what was found during the procedure and discuss with you any treatment or follow-up you need.

Regular exercise should improve your long-term health. Before you start exercising, ask the healthcare team or your GP for advice.


An upper GI endoscopy and colonoscopy is usually a safe and effective way of finding out if there is a problem with your digestive system.

Self-pay guide price

From £2,115


Self-pay package details

Combined gastroscopy and colonoscopy is performed at The Foscote Hospital by

  • Dr Tony Ellis

    Consultant Gastroenterologist


    Learn more
  • dr jonathan marshall gastroenterology banbury

    Dr Jonathan Marshall

    Consultant Gastroenterologist


    Learn more


Author: Mr Simon Parsons DM FRCS (Gen. Surg.) and Mr Jonathan Lund DM FRCS (Gen. Surg.)

Illustrations: Medical Illustration Copyright © Medical-Artist.com

This page is intended for information purposes only and should not replace advice that your relevant health professional would give you.

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