Colonoscopy at Ashtead Hospital
A colonoscopy is a procedure used to examine the inside of your large intestine (colon) and rectum. During the procedure, a doctor uses a thin, flexible tube with a tiny camera at the end (called a colonoscope) to look for any abnormalities.
A colonoscopy can help diagnose and treat a range of bowel conditions, such as polyps, Crohn’s disease, ulcerative colitis, and colorectal cancer. Most patients recover quickly, returning to normal activities within a day or two.
Here we explain what a colonoscopy procedure involves, what diseases can be detected, and what to expect from a private colonoscopy with Ramsay Health Care.
What is a colonoscopy?
A colonoscopy is a diagnostic procedure that allows your doctor to see the inner lining of your colon and rectum in real time. It’s performed using a colonoscope – a long, thin, flexible tube fitted with a light and a camera.
The colonoscope is gently inserted through your anus into your rectum and large intestine, with no need for surgical incisions (cuts). Video footage from the camera is shown on a screen, enabling your doctor to look closely at the bowel lining and identify any areas of concern. 
A colonoscopy may be recommended to:
- Investigate symptoms, such as abdominal pain, rectal bleeding, or changes in bowel habits.
- Detect and remove bowel polyps, which can sometimes develop into cancer if left untreated.
- Take tissue samples (biopsies) to test for inflammatory bowel disease or other conditions.
What happens during a colonoscopy?
Before your procedure, you’ll receive detailed colonoscopy prep guidance about what you can and can’t eat, and you may be prescribed a laxative to clear your bowel.
On the day of your procedure, you’ll usually be offered a sedative. Some patients may receive deeper sedation to sleep through the procedure, while others remain awake but comfortable.
Once the colonoscopy procedure begins, the following steps usually take place:
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Stages of a colonoscopy |
What you may feel (if awake) |
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The colonoscope is gently inserted into your anus. |
You might feel some pressure, but it shouldn’t be painful. |
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Air or carbon dioxide is pumped into your colon to expand it for better visibility. |
A feeling of fullness or bloating is common. |
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The colonoscope is moved through your colon so the doctor can examine all areas. |
You may feel mild cramping or an urge to pass gas. |
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Additional instruments may be used to remove polyps, take biopsies, or perform minor treatments. |
These steps are usually painless and completed through the colonoscope. |
Why would a colonoscopy be done?
A colonoscopy may be carried out for preventative, diagnostic, or therapeutic reasons – and sometimes for all three at once. It helps identify, monitor, or treat a range of bowel conditions and symptoms.
Preventative reasons to have a colonoscopy
A colonoscopy is often performed as a screening test to help detect early signs of bowel cancer or other colon conditions before symptoms appear. You may be recommended for screening if you have:
- A family history of colorectal cancer or bowel polyps
- A personal history of inflammatory bowel disease (IBD)
- Been invited for a routine bowel cancer screening as part of NHS or private care
Early detection through colonoscopy can significantly improve treatment outcomes and reduce the risk of developing colorectal cancer.
Diagnostic reasons to have a colonoscopy
You may be referred for a colonoscopy if you’re experiencing unexplained bowel symptoms, such as:
- Abdominal pain or discomfort
- Rectal bleeding or blood in your stool
- Unexplained weight loss
- Persistent diarrhoea or constipation
- Changes in your usual bowel habits
The procedure allows your consultant to examine your bowel and identify possible causes, such as diverticulitis, Crohn’s disease, or ulcerative colitis.
Therapeutic reasons to have a colonoscopy
A colonoscopy can also be used to carry out minimally invasive treatment at the same time as diagnosis. Guided by the colonoscope, your consultant can:
- Remove polyps
- Seal wounds
- Remove blockages
- Placing a stent
- Take a biopsy (tissue sample) for further analysis
- Inject medication or apply laser therapy
- Place a stent to relieve an obstruction
What diseases can be detected by a colonoscopy?
A colonoscopy is one of the most effective ways to diagnose conditions affecting the large intestine (colon). It allows direct visual inspection and enables the consultant to take biopsies for laboratory analysis.
Common conditions detected or diagnosed include:
- Chronic colitis - including ulcerative colitis and Crohn’s disease - both types of inflammatory bowel disease (IBD)
- Diverticulosis and diverticulitis - small pouches that form in the bowel wall and can become inflamed or infected
- Ischemic colitis – inflammation caused by reduced blood flow to the colon
- Ulcers and perforations - Sores or tears in the bowel lining
- Large bowel obstruction - Where a blockage prevents the passage of waste
- Colorectal polyps – small, often benign growths that can sometimes develop into cancer
- Colorectal cancer - a colonoscopy can both screen for and diagnose bowel cancer, especially if a biopsy is taken
How long does a colonoscopy take?
Most colonoscopy procedures take between 30 and 45 minutes to complete, although the time can be longer if additional surgical interventions are performed during the colonoscopy, such as taking biopsies or removing polyps. Typically, it takes around 15 minutes for the colonoscope to reach the end of the colon, and another 15 minutes to withdraw it, with extra time added for examining specific areas and performing any additional procedures.
Colonoscopies are usually carried out as outpatient procedures, meaning you can go home the same day. Including pre-procedure preparation and post-procedure recovery, most patients spend around three to five hours in the hospital. Your surgeon and nursing team will explain the process so you know what to expect.
How to prepare for a colonoscopy?
Proper colonoscopy prep is essential to ensure your colon is completely empty, allowing the surgeon to clearly examine the lining of your large intestine. Before your procedure, your Ramsay team will give you detailed instructions, which typically include:
- Following a low-fibre diet or fasting for a certain period before the procedure
- Taking a strong laxative to clear your bowels
- Stopping certain medications, such as blood thinners, if advised
- Having a shower or bath and using unperfumed soap on the day of your procedure
- Wearing loose, comfortable clothing and arranging for someone to drive you home
Colonoscopy recovery
Most colonoscopy procedures are performed on an outpatient basis, so you can usually go home after a few hours. After the procedure, you will rest in a recovery room until the effects of the sedative have worn off and you feel comfortable standing and walking.
Because sedation can make you drowsy for up to 24 hours, you should arrange for someone to drive you home and stay with you overnight if needed. Mild bloating, cramping, or stomach discomfort is common for a few hours after the procedure. Over-the-counter pain relief, such as paracetamol or ibuprofen, can help if needed. If a biopsy was taken or polyps were removed, you may notice some mild rectal bleeding for a couple of days.
Most patients return to normal activities within a day or two, but your medical team will provide specific guidance and advice on monitoring your recovery.
What are the potential risks and complications of a colonoscopy?
Colonoscopy procedures are generally safe, with serious complications being very rare. However, as with all medical procedures, there are some risks to be aware of.
Common, minor potential colonoscopy complications include:
- Bloating and/or stomach cramps after the procedure
- Mild rectal bleeding, particularly if a biopsy or polyp removal was performed
- Feeling sick (nausea) afterwards
- Minor bacterial infections of the colon
Rare, more serious complications include:
- Injury to the colon, such as a tear or perforation
- Allergic reactions or adverse effects to the sedative
- Post-polypectomy electrocoagulation syndrome (PPCS) – a very rare condition that can cause tenderness, pain, and fever, and is treatable with antibiotics.
Although complications are uncommon, colonoscopies are extremely valuable for diagnosing and treating serious conditions, including colorectal cancer and other bowel diseases. Your surgeon will discuss any risks specific to your situation and answer any questions you may have.
Colonoscopy cost
At Ramsay Health Care, we offer expert medical care combined with clear, transparent options for paying for your colonoscopy.
If you choose to self-fund, our all-inclusive Total Care package provides everything you need for a single, pre-agreed price. This one-off payment covers your consultation, procedure, and aftercare, giving you complete reassurance with no hidden costs. Flexible finance options are also available, allowing you to spread the cost of your colonoscopy if needed.
If you have private medical insurance, your colonoscopy may be covered. We recommend checking your policy details with your insurance provider and obtaining written confirmation before starting treatment with us.
Why choose a private colonoscopy?
A private colonoscopy can have several advantages, such as:
- No long waiting times: You can schedule a colonoscopy quickly, without being placed on a lengthy waiting list
- Flexible appointment times: Private care allows you to arrange appointments at times that suit your lifestyle
- Choice of consultant: You may have the option to select your preferred specialist where possible.
- Personalised care: Private hospitals often provide more tailored attention and support before, during, and after your procedure.
- Streamlined process: From preparation to recovery, private care is designed to minimise delays and make your experience as smooth as possible.
Your colonoscopy at Ramsay Health Care
At Ramsay Health Care, you’ll benefit from fast access to private colonoscopy procedures performed by experienced consultant surgeons.
Our modern hospitals across the UK provide expert medical teams, including highly trained surgeons and nursing staff who specialise in colonoscopy procedures.
Ramsay also provides comprehensive aftercare. If you experience any complications or require follow-up treatment, our teams are on hand to provide the necessary support without delay.
Our friendly advisors can guide you through the entire process, from preparation and appointments to treatment options, making the journey straightforward and reassuring.
Contact us today to find out more about a private colonoscopy with Ramsay Health Care, including pricing, and to book your initial appointment.
