In some cases, your GP may suggest having a gastroscopy at the same time as your colonoscopy. While a colonoscopy examines the large intestine, including the colon and rectum, a gastroscopy allows the upper gastrointestinal tract to be visualised, including the oesophagus, stomach, and the first part of the small intestine (duodenum).
Carrying out both procedures during a single session enables your specialist to assess both the upper and lower parts of your digestive system efficiently. Two different instruments are used for this purpose:
- A gastroscope to examine the upper GI tract
- A colonoscope to inspect the large bowel
This combined approach is particularly helpful when symptoms are unclear or a thorough assessment is required. It may be recommended for conditions such as unexplained abdominal pain, gastrointestinal bleeding, anaemia, or ongoing digestive problems that could involve multiple areas of the gastrointestinal tract.
Your consultant will explain why a combined gastroscopy and colonoscopy is suitable for you, including the benefits of the procedure and what to expect during and after it.
You can find out more about each procedure below:
Gastroscopy ColonoscopyChoosing the correct bowel preparation guidance
At the bottom of this page, you will find links to guidance on your bowel preparation. It is important that you read and follow the link that matches the bowel preparation you have been prescribed, as advised by your pre-assessment nurse.
Some preparations may look similar but have different instructions. Please do not use a preparation that is not intended for you.
If you have any questions, please contact the endoscopy team on 0203 058 9083 or 0203 058 9068 for further clarification.