At Nuffield Health Oxford, The Manor Hospital, our team of expert endoscopists have access to the latest technology so that they can make a comprehensive diagnosis.

What is a colonoscopy?

A colonoscopy is a test that allows a consultant to examine the inner lining of the large intestine (rectum and colon). We use a thin, flexible tube called a colonoscope to examine the colon.

A colonoscopy helps identify conditions such as:

  • ulcers
  • colon polyps
  • tumours
  • areas of inflammation.

A colonoscopy can help to explore possible causes of:

  • abdominal pain
  • rectal bleeding
  • chronic constipation
  • chronic diarrhoea
  • other intestinal problems.

What happens during a colonoscopy?

Preparing for a colonoscopy

Before a colonoscopy, you'll need to clean out (empty) your colon. If your colon lining isn't clear of solids or liquids, then the colonoscope may not have a clear view of the rectum.

2 days before your colonoscopy - eat a low-fibre diet to help keep your colon clear.

The day before your colonoscopy - your doctor will ask you to drink laxative sachets to empty your bowels. You'll probably get diarrhoea a few hours after taking the first sachet, so it's best to be at home all day so that you're close to a toilet.

During a colonoscopy

If appropriate, the endoscopist may offer you a sedative or painkiller. The procedure involves inserting a flexible telescope into the back passage and blowing air into the large bowel to get a clear view.

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

A colonoscopy usually takes 30-45 minutes.


Is the procedure painful?

You may feel the camera going in, but it shouldn't be painful. Bloating or stomach cramps are normal reactions. To help you feel more comfortable, you may be given sedatives, painkillers, or gas and air before your colonoscopy.

Recovery after a colonoscopy

If given a sedative, you will typically recover in about two hours. You should not drive for 24 hours and so you should arrange for somebody to take you home. You should also not drink alcohol or sign any legal documents for 24 hours.


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

You should be able to return to work the day after the colonoscopy.

If you do not have a sedative, you can go home and do everything normally.

Why choose Nuffield Health Oxford Hospital for my colonoscopy?

Nuffield Health Oxford Hospital is one of the most modern and technologically advanced in the UK. Our excellent matron-led nursing team supports our expert endoscopists. We pride ourselves on delivering exceptional, individual care.

Even as a day patient, our nurses will make you as comfortable as possible, give you details about any follow-up appointments, and, if necessary, help you make arrangements for the journey home.

If you require a colonoscopy and don't want to be on an endless waiting list, get in touch today to arrange your rapid access to treatment/diagnosis.

Find out more about Colonoscopy
Oxford, The Manor Hospital

Beech Road, Headington, Oxford, OX3 7RP

01865 307777

Please note, there is only limited parking available at our hospital. Our car park is now managed by EURO CARPARKS. Patients and visitors are required to input their car registration in to the panels located in the main reception areas to avoid a fine. Parking T&Cs are detailed on signs in the car park.

Reception and all general enquiries 01865 307777
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Diagnostic Imaging (appointments and enquiries) 01865 307 457
Nurses' Station (for inpatients only) 01865 307 579
Physiotherapy (appointments only) 0333 305 7905
Physiotherapy (enquiries) 01865 307 533

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