Colonoscopy: Examination of the Large Intestine with a Camera-Equipped Device

Colonoscopy
Colonoscopy is the examination of the large intestine with a camera-equipped device. The device used in this procedure is called a colonoscope.
How is Colonoscopy Performed?

- Colonoscopy allows for examination of all sections of the large intestine starting from the rectum.
- Colonoscopy is a medical procedure that enables the doctor to examine the inner surface of your colon (large intestine). This procedure can help identify polyps, tumors, and other abnormal growths in the colon.
- Colonoscopy is an endoscopic procedure that can be performed by various healthcare specialists such as general surgeons, gastroenterologists, and colorectal surgeons.
- During colonoscopy, a long, flexible tube (colonoscope) is inserted into the rectum and passed through the colon. At the tip of the colonoscope is a small camera that transmits images of the inside of the colon to a monitor in the examination room.
- Your doctor will be able to see any abnormal areas and take a biopsy (tissue sample) if necessary. Colonoscopy typically lasts 30-60 minutes.
- You will be given anesthesia to help you relax during the procedure. After colonoscopy is completed, you will likely have limited memory of the procedure.
- You may experience some bloating and gas after the procedure, but this will resolve quickly. You should be able to return to normal activities within one or two days.
Why is Colonoscopy Performed?
Colonoscopy is an endoscopic examination of the large intestine (colon) and rectum. This procedure is used to determine whether there are any abnormalities in the large intestine or rectum.
– Colorectal Cancer Screening: Colonoscopy is recommended for colorectal cancer screening in individuals over 50 years of age. – Suspicion of Abnormality in the Large Intestine or Rectum: If symptoms such as abdominal pain, diarrhea, constipation, blood or mucus in stool are present, colonoscopy can detect any abnormality in the large intestine or rectum. – Detection of Polyps or Masses in the Large Intestine or Rectum: Polyps or masses detected in the large intestine or rectum during colonoscopy can be removed before they develop into cancer. – Evaluation of Previous Surgery or Treatment in the Large Intestine or Rectum: Colonoscopy can be used to evaluate the effectiveness of previous surgery or treatment in the large intestine or rectum. Colonoscopy is an important diagnostic method that allows you to identify abnormalities by directly visualizing the inner surface of the large intestine and rectum. Abnormalities detected during colonoscopy can be treated before they develop into cancer.
Pre-Colonoscopy Diet
Two days before the colonoscopy procedure, the patient should begin eating a soft, low-fiber, and fluid-rich diet. It is important for the patient to prepare by using prescribed medications to cleanse the bowels before the colonoscopy procedure.
If you have scheduled a colonoscopy appointment, your doctor will likely recommend a special diet to prepare for the procedure. This is because the colon needs to be empty for the examination.
You will need to follow a special diet for several days to prepare for colonoscopy. This diet consists only of fiber-free liquids and low-fiber foods. You should avoid solid foods, dairy products, and anything with seeds or shells.
Below are some examples of what you can eat on a pre-colonoscopy diet:
- Beef broth
- Fiber-free fruit juices (such as apple juice)
- Sports drinks
- Strained fruit juices
- Plain coffee
- Tea
You need to follow your doctor's instructions regarding how long you will stay on the pre-colonoscopy diet and when you can resume solid foods. It is important to adhere to the diet plan for colonoscopy to be performed safely and effectively.
Precautions Before Colonoscopy

- One of the preparations before colonoscopy is for the patient to stop taking blood thinning medications, if applicable.
- If you have any allergies to substances or medications, you should inform your doctor before the colonoscopy procedure.
- The patient must be fasting during the colonoscopy procedure.
- Medications used in the colonoscopy preparation phase may sometimes cause nausea. If complaints such as nausea and vomiting increase, breaks can be taken from bowel cleansing medications.
- Drinking medications slowly and taking approximately a half-hour break when feeling nauseous can reduce the severity of nausea.
- Additionally, consuming cold water with the medication can also reduce nausea complaints.
Bowel Cleansing Before Colonoscopy
Colonoscopy is an endoscopic procedure used to examine the large intestine and rectum. During this procedure, your doctor inserts a device containing a camera and light into the large intestine to visualize this area.
For colonoscopy to be successful, the large intestine must be completely clean. This removes any remaining stool and mucus in the large intestine.
Bowel cleansing before colonoscopy is usually performed using enema or laxatives. An enema is a procedure that delivers fluid to the large intestine. Laxatives increase bowel movements and aid in stool elimination.
Methods Used for Bowel Cleansing Before Colonoscopy
Enema: An enema is a procedure that delivers fluid to the large intestine. An enema is an effective method for removing stool and mucus from the large intestine. Laxatives: Laxatives increase bowel movements and aid in stool elimination. While laxatives are not as effective as enemas, they are a method that can be done at home. Appetite Suppressant and Laxative Combination: In this method, appetite suppressant medications are used to prevent the patient from eating. This reduces the amount of remaining stool in the bowel. Then, laxatives are used to eliminate stool from the large intestine.
Colonoscopy Procedure Steps

- During the colonoscopy procedure, the patient is positioned on their left side and asked to bring their knees toward their chest.
- While the patient is in this position, anesthesia is administered to allow the patient to enter deep sleep.
- The colonoscope device is slowly advanced through the rectum, first entering the last section of the large intestine, the rectum.
- While the colonoscope is in the rectum, air is delivered through the device to inflate the bowel and expand the field of vision.
- The colonoscope device is then advanced to accommodate the turns within the large intestine.
- The device is carefully passed from the junction of the large intestine and small intestine into the small intestine.
- During colonoscopy, the last section of the small intestine is also examined.
Which Part of the Body is Colonoscopy Performed Through?
Colonoscopy is an endoscopic procedure used to examine the large intestine and rectum. This procedure allows visualization of the entire inner surface of the large intestine.
Colonoscopy is performed through the anus. A colonoscope is a device used to examine the large intestine and rectum. The colonoscope is inserted through the anus into the large intestine and visualizes the entire inner surface of the large intestine.
Colonoscopy is usually performed under sedation or general anesthesia. In colonoscopy performed under sedation, the patient remains conscious but does not feel pain or discomfort. In colonoscopy performed under general anesthesia, the patient is completely sedated and the procedure is performed.
How Long Does the Colonoscopy Procedure Take?
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The colonoscopy procedure takes approximately half an hour. Images can be examined during the procedure. Additionally, abnormal formations detected during imaging can be removed with the help of the colonoscope. Generally, a biopsy sample is taken from the intestinal tissue during colonoscopy and sent to the laboratory for examination.
Bleeding After Colonoscopy
Colonoscopy is an endoscopic procedure used to examine the large intestine and rectum. This procedure is used to determine whether there are any abnormalities in the large intestine or rectum.
Post-colonoscopy bleeding is one of the most common complications of this procedure. Post-colonoscopy bleeding is usually mild and resolves spontaneously within a few days. However, in some cases, bleeding can be severe and may require medical intervention.
Causes of Post-Colonoscopy Bleeding:
Post-colonoscopy bleeding is usually seen as blood or mucus in stool. Additionally, bleeding from the anus or rectal pain may also occur.
Treatment of Post-Colonoscopy Bleeding
Post-colonoscopy bleeding is usually mild and resolves spontaneously. However, in some cases, bleeding can be severe and may require medical intervention.
Post-colonoscopy bleeding is usually treated with the following methods:
Rest and copious fluid intake: Post-colonoscopy bleeding usually resolves with rest and copious fluid intake. Medications: Medications can be used to stop bleeding. Surgical intervention: If bleeding is severe or does not stop spontaneously, surgical intervention may be necessary.
How to Prevent Post-Colonoscopy Bleeding?
- Follow your doctor's instructions carefully before colonoscopy.
- Follow your doctor's recommendations after colonoscopy.
- If you have bleeding disorders, inform your doctor.
Why is Biopsy Sampling Necessary During Colonoscopy?

Suspicion of Abnormality in the Large Intestine or Rectum: Abnormalities such as polyps, masses, or ulcers in the large intestine or rectum may be detected during colonoscopy. If these abnormalities have a risk of developing into cancer, a tissue sample must be taken and examined in a pathology laboratory. Removal of Polyps or Masses: During colonoscopy, polyps or masses may need to be removed from the large intestine or rectum. To determine whether these polyps or masses are cancerous, a tissue sample must be taken and examined in a pathology laboratory. Diagnosis of Colorectal Cancer: Colorectal cancer may be detected during colonoscopy. In this case, a tissue sample must be taken and examined in a pathology laboratory to determine the stage and spread of the cancer.
Risks of Biopsy Sampling During Colonoscopy:
Infection: There is a small risk of infection during colonoscopy. Perforation: Perforation of the large intestine or rectum is a rare complication during colonoscopy. Pain: Some individuals may experience pain during colonoscopy.
Benefits of Biopsy Sampling During Colonoscopy:
Early Diagnosis of Colorectal Cancer: Biopsy sampling during colonoscopy helps in early diagnosis of colorectal cancer. Colorectal cancer diagnosed early is usually easier to treat. Determination of Spread of Colorectal Cancer: Biopsy sampling during colonoscopy helps determine the spread of colorectal cancer. This information is used in creating a treatment plan.
In Which Conditions is Colonoscopy Performed?

Colonoscopy is applied for diagnosis in cases of abdominal pain, prolonged constipation or diarrhea, unexplained weight loss, unexplained iron deficiency and anemia, and blood in the stool.
Patients found to have polyps in their intestines during colonoscopy evaluation should undergo colonoscopy at regular intervals. Particularly, bowel screening is recommended every 5 years with colonoscopy in individuals over 50 years of age. Bowel screening is very important in early detection and treatment of colon and rectal cancer.
Precautions After Colonoscopy
After colonoscopy, the patient is allowed to rest for approximately one hour and is sent home the same day. Since air is introduced into the bowel during the colonoscopy procedure, patients may experience gas pain after the procedure. Small amounts of blood may be seen in stool after the procedure. However, if bleeding persists or is excessive, you should seek medical care. Copious fluid intake is necessary after colonoscopy.
Complaints After Colonoscopy Procedure
There are some complications (adverse situations) that may occur during or after the colonoscopy procedure. These complaints include:
- Bleeding
- Inflammation
- Abdominal pain
- Tear in the bowel wall
- Herniation in the bowel wall
Gas Pain After Colonoscopy
Colonoscopy is an endoscopic procedure used to examine the large intestine and rectum. During this procedure, air is introduced into the large intestine. This air allows for better visualization of the large intestine. However, this air can cause discomfort such as gas pain and bloating after colonoscopy.
Post-colonoscopy gas pain is one of the most common side effects of this procedure. Post-colonoscopy gas pain is usually mild and resolves spontaneously within a few days. However, in some cases, gas pain can be severe and may affect daily life.
Causes of Post-Colonoscopy Gas Pain:
- Air introduced during colonoscopy: Air introduced into the large intestine during colonoscopy can cause gas pain and bloating.
- Removal of polyps or masses during colonoscopy: Removal of polyps or masses from the large intestine or rectum during colonoscopy can cause gas pain and bloating.
- Preparation performed before colonoscopy: Preparation performed before colonoscopy can cause gas pain and bloating.
Treatment of Post-Colonoscopy Gas Pain:
Post-colonoscopy gas pain is usually mild and resolves spontaneously. However, in some cases, gas pain can be severe and may require medical intervention.
- Copious fluid intake: Copious fluid intake can help reduce gas pain and bloating.
- Walking: Walking can help reduce gas pain and bloating.
- Gas-relief medications: Gas-relief medications can help reduce gas pain and bloating.
Post-Colonoscopy Diet
After undergoing colonoscopy, it is important to eat healthy foods that will help your recovery and rehabilitation. Some good options include:
- Fruits and vegetables: These contain nutrients that can help your body heal.
- Lean protein: Protein is necessary for tissue rebuilding and repair. Choose lean sources such as grilled chicken or fish, tofu, or legumes.
- Whole grains: Whole grains contain fiber and other nutrients that support intestinal health. Prefer products such as whole grain bread, quinoa, or brown rice.
- Probiotic foods: Probiotics help support healthy intestinal microbiota. Add probiotic foods such as yogurt and kefir to your diet.
- Water: Staying hydrated is important for all aspects of health, including colon health. Drink plenty of water throughout the day.
Colonoscopy Prices in Turkey 2026
In Turkey, colonoscopy prices will vary depending on factors such as doctor fees, clinic fees, and procedures applied during the colonoscopy procedure. Regardless of the price range for colonoscopy, it is important to have the procedure done if your doctor recommends it. Colon cancer is one of the leading causes of death worldwide, so early diagnosis is very important to prevent this condition.
Medical Information.This content has been prepared by the Vimfay content team with contributions from physicians who are experts in their field. All content on the site is for general informational purposes only and does not constitute medical advice. Vimfay is an intermediary organization; it does not provide diagnosis or treatment services. Please consult a physician for evaluation, diagnosis, and treatment regarding your complaint.
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