Endoscopy

Colonoscopy (Large Bowel Examination)

What is a

Colonoscopy

A colonoscopy is a procedure used to examine the internal lining of the large bowel. It is primarily used to investigate suspected abnormalities, such as changes in bowel habits or bleeding, and for the surveillance of patients with a history of polyps, cancer, or a relevant family history.

About this procedure

A long, flexible tube is inserted into the rectum and guided through the colon. The specialist views the live video feed to check for polyps or signs of disease. If polyps (small growths) are found, they can often be removed immediately during the procedure, which is a vital step in preventing bowel cancer.

Recovery timeline

This is a day-stay procedure. Due to the sedation and the bowel preparation required beforehand, patients should plan to take the full day off. Most patients feel back to normal after a good night's sleep.

Links to other procedures

Bowel Screening Programme

Bowel screening is designed for individuals who may not have obvious symptoms or a known family history. The goal is to detect very early-stage cancer or polyps when they are significantly easier to treat and cure. We encourage all New Zealanders to remain vigilant regarding bowel symptoms and risk factors.

Colonoscopy (Large Bowel Examination)

Gastroscopy (Upper GI Endoscopy)

A gastroscopy is a procedure that enables your specialist to see inside your upper gastrointestinal tract—specifically the oesophagus, stomach, and duodenum. Unlike X-rays, which take external photographs, endoscopy allows for direct visualisation of the internal surfaces, providing significantly more detail and diagnostic accuracy.