Colonoscopy is a safe and common procedure used to examine the inside of the large bowel (colon). At Otago Surgical Associates (OSA) in Dunedin, we provide local colonoscopy services for patients across Otago, helping with timely diagnosis and treatment of bowel conditions.
This guide explains why colonoscopy is done, how to prepare, what to expect during the procedure, and aftercare, so you feel informed and confident.
Colonoscopy: Patient Guide at Otago Surgical Associates
What is a Colonoscopy?
A colonoscopy uses a thin, flexible tube with a camera at the tip (a colonoscope) to look inside your colon. It helps detect inflammation, polyps, bleeding, or cancer.
During the procedure:
Small tissue samples (biopsies) can be taken.
Polyps can often be removed.
Why is Colonoscopy Recommended?
Your doctor may recommend a colonoscopy for:
Bowel symptoms like bleeding, changes in bowel habits, abdominal pain, or unexplained anemia
Positive bowel screening tests
Family or personal history of polyps or colorectal cancer
Monitoring inflammatory bowel disease
Unexplained weight loss or chronic diarrhoea
Preparing for Your Colonoscopy
Good bowel prep is essential for a clear view and accurate results.
Before the procedure:
Follow a low-residue diet for several days
Avoid seeds, nuts, and high-fiber foods
Review medications with your doctor (some, like blood thinners or iron tablets, may need adjustment)
Bowel preparation:
Drink a prescribed laxative solution the day before (and sometimes the morning of)
Expect frequent, loose bowel motions and stay near a toilet
Drink clear fluids to stay hydrated
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Before the colonoscopy:
Do not eat solid food; clear fluids may be allowed
Arrange for someone to drive you home (sedation is commonly used)
Nursing staff will review your medical history and medications
Your surgeon will answer any last-minute questions
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You will recover until sedation wears off; most patients go home the same day
Mild bloating, wind, or abdominal discomfort is normal
Rest for the remainder of the day; avoid driving, alcohol, or important decisions for 24 hours
Resume normal eating unless advised otherwise
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Immediate findings are explained on the day
Biopsy results are usually available in 1–2 weeks
Your surgeon will provide a follow-up plan, including repeat colonoscopy if needed
Colonoscopy at Otago Surgical Associates
OSA offers colonoscopy with a focus on:
Clear communication and patient education
High procedural standards and safety
Efficient access for urgent and routine cases
Seamless care if further treatment is required
Referrals and access:
GP referrals are welcome and triaged
Self-referrals are accepted for assessment
OSA acts as a single referral point to ensure you see the right specialist
If you are advised to have a colonoscopy or have ongoing bowel symptoms, early assessment is important. Colonoscopy helps detect problems early and guide effective treatment.
To arrange a referral or consultation, contact Otago Surgical Associates.