A colonoscopy is a procedure in which a thin, flexible tube with a camera on the end is inserted through the colon (large intestine) while you are asleep to look for and remove lesions. It has been available in the United States for over 50 years and has significantly advanced during that time. It is performed Monday through Friday at our gastroenterology clinic in San Antonio, TX.

When you arrive for your colonoscopy, our endoscopy nursing team will check you in, review your medical history, and place an IV to help make you comfortable during the procedure. You will then meet with the anesthesiology provider to discuss your sedation. Afterward, Dr. Havranek will review the procedure with you and answer any

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We will do everything possible to make your exam as safe, pleasant, and comfortable as we can. Please arrive at the endoscopy center at least one hour before your scheduled exam time. This allows our nurses and anesthesia providers to review everything with you in detail and discuss your health and medical history, ensuring your safety. They will also answer any questions you may have. An IV will be placed in a vein in your arm to administer fluids and medications during the procedure.

You will speak with Dr. Havranek, who will address any questions you have before the exam. Then, you will receive medications through the IV to help you relax and sleep during the procedure. You will be alert

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Polyps are common. Studies have shown that about 25-40% of people over age 45 have a precancerous colon polyp during their exam. Most polyps can be removed during a colonoscopy. Dr. Havranek has many tools he can insert through the colonoscope’s working channels during your exam to safely remove them. For small polyps, he will use biopsy forceps, like small scissors, to trim them out. For larger polyps, he will use a snare (like a loop) that goes around the base of the polyp, and while cutting through it, an electric current is applied to cauterize the base and reduce bleeding. Since polyps grow in the colon’s superficial lining (mucosa), which has very few significant blood vessels, any bleeding is

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The day before your colonoscopy, you will start a liquid diet around lunchtime. You can continue to work on this day. That evening, usually after work, you will begin the bowel prep. This will keep you occupied for the night, so if you work the graveyard shift, you should take that shift off to stay at home. On the day of the exam, we ask that you take the entire day off work. Although you will only be at our endoscopy center for about 2-3 hours, you will be sedated, so we do not want you driving or making any major decisions for the rest of the day. You will likely want to go home and rest. The next day,

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A patient’s privacy is always a top priority. Our team members understand that the idea of strangers seeing your bare skin can be embarrassing. We take extra precautions to keep you covered with warm blankets right up to your exam. Once you are asleep, Dr. Havranek will expose only the necessary part of your backside to safely pass the colonoscope and perform the colonoscopy. The nurse and anesthesiology provider work on the opposite side of your exam table and cannot see your backside. The endoscopy technician assisting Dr. Havranek during the procedure will stand by his side and conduct everything professionally. Our team will do everything possible to protect your privacy.

A colonoscopy performed by an experienced team should not be painful at all. Before the exam begins, you will receive some sedating medication through your IV administered by an anesthesia provider, and you will drift off to sleep. You will be awake enough to breathe on your own but sleepy enough to be comfortable. During the exam, you should not feel anything. Afterward, you may feel gassy and bloated for a while due to the air introduced into your colon during the procedure, but this usually passes fairly quickly.

The U.S. Preventive Services Task Force and the American College of Gastroenterology both recommend that colon cancer screening start at age 45. They also suggest ongoing surveillance until at least age 75, depending on other health factors. If you have additional risk factors, such as a family history of colon cancer or precancerous polyps (adenomas), a personal history of other cancers, or a hereditary condition linked to higher colon cancer risk, screening might need to begin at a younger age. Unexplained rectal bleeding at any age should also be evaluated. If you have specific questions about when to be screened, please contact our office to schedule an appointment to discuss your screening plan.

For the correct indication, colonoscopy is covered by most insurance carriers. Screening at age 45 or older, or sooner if you have risk factors, and blood in the stool, is also covered by nearly all insurance plans. The only sure way to know is to have our office check your insurance benefits, which they will do free of charge. They can determine if and how well it is covered under your plan. Don’t let your insurance company’s decision on coverage discourage you from getting screened—if colon cancer is missed, the insurance saves money on the colonoscopy, but you may have to deal with the cancer later. Most endoscopy centers, including ours, offer private pay cash prices if your insurance doesn’t

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Yes. There are many studies on this topic, and we have found that colonoscopy and colon cancer screening do save lives. It is estimated that over 158k people will be diagnosed with colon cancer in the United States this year, and 55k will die from it. A large, long-term study from Harvard School of Public Health concluded that 40% of all colorectal cancers could be prevented if people underwent colonoscopy screening. The National Polyp Study conducted in the United States found risk reductions of 76% to 90% among those screened with colonoscopy. These are just two examples of many studies showing that colonoscopy effectively helps prevent colon cancer by finding

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A colonoscope is a thin (10mm) tube with a lighted camera. It also has channels that allow different instruments, like small forceps for biopsies or snares to remove polyps, to be passed into your colon during the exam. This makes the colonoscope a tool that helps us both detect and remove polyps during the same procedure. It is used by gastroenterologists, like Dr. Havranek, to treat colon bleeding, remove polyps, detect colon cancer, and remove foreign objects.