Panenteric capsule endoscopy

Panenteric capsule endoscopy involves swallowing a smooth, pill‑sized camera that takes images of the lining of your oesophagus, stomach, small bowel and large bowel as it passes through. We are one of the very few hospitals to provide this advanced diagnostic service, offering small bowel capsule endoscopy, colon capsule endoscopy and full panenteric capsule endoscopy within a single, coordinated pathway.

At The London Clinic, this service includes three types of capsule tests:

• Small bowel capsule endoscopy – focuses on the small intestine, where standard endoscopy or colonoscopy cannot easily reach.
• Colon capsule endoscopy – offers a minimally invasive, sedation‑free alternative to traditional colonoscopy for visualising the large bowel.
• Panenteric capsule endoscopy – assesses the whole gastrointestinal tract from mouth to anus in one procedure, combining the advantages of both small bowel and colon capsules.

These tests are diagnostic only. If the capsule identifies an area that needs a biopsy or treatment, your consultant will arrange follow‑up endoscopy or colonoscopy to deliver that care.

Panenteric and capsule endoscopy are used to investigate symptoms or conditions where your doctor needs a clear view of the bowel lining, but a less invasive approach may be preferable. Examples include:

• Unexplained iron‑deficiency anaemia or suspected small‑bowel bleeding
• Possible Crohn’s disease or other inflammatory bowel disease affecting the small bowel and colon
• Persistent abdominal pain, diarrhoea or weight loss where previous tests have been inconclusive
• Monitoring known Crohn’s disease to assess mucosal healing along the whole gut
• Assessment of polyps or other abnormalities where a non‑sedated, capsule‑based test is appropriate

Your consultant will advise whether small bowel, colon or full panenteric capsule endoscopy is the most suitable option based on your symptoms and previous investigations.

Panenteric capsule endoscopy can be helpful for adults who need detailed imaging of the bowel but would prefer to avoid, or are not suitable for, traditional endoscopy under sedation. It may be particularly suitable if you:

• Are anxious about conventional endoscopy or colonoscopy
• Wish to avoid sedation or general anaesthesia
• Have had an incomplete colonoscopy or technically difficult procedure
• Are considered lower risk, but your doctor still needs to rule out serious conditions such as inflammatory bowel disease or small‑bowel bleeding

Capsule endoscopy is not appropriate for everyone. It may not be recommended if you have known strictures or narrowing in the bowel, swallowing difficulties, or certain implanted devices. Your consultant will review your medical history and may arrange further imaging or a patency capsule (a dissolvable “test” capsule) first, to make sure the camera capsule can pass safely.

Panenteric capsule endoscopy is generally very safe, but like all medical tests it carries some risks and limitations:

• Capsule retention – in a small number of people, the capsule may get stuck in a narrowed area of bowel; this sometimes passes with time but may require medication, endoscopy or, rarely, surgery to remove it.
• Incomplete examination – occasionally the capsule may not reach the end of the bowel before the battery runs out, especially if the bowel moves slowly or preparation is sub‑optimal.
• Missed lesions – while capsule endoscopy is very sensitive, small or subtle changes can still be missed, and the stomach and oesophagus can sometimes be less well seen than the small bowel and colon.
• Discomfort from bowel preparation – the laxatives and clear‑fluid diet needed to clean the bowel can cause bloating, diarrhoea or nausea for a short time.

Your consultant will talk through these potential risks and how they apply to you, and will explain what to do if the capsule does not pass or you feel unwell after the test.