Lower Endoscopy or Colonoscopy

Colonoscopy is a procedure that enables your surgeon to examine the lining of the rectum and colon. It is usually done in the hospital or an endoscopic procedure room. A soft, bendable tube about the thickness of the index finger is gently inserted into the anus and advanced into the rectum and the colon.

A colonoscopy is usually done:

1. as part of a routine screening for cancer,
2. in patients with known polyps or previous polyp removal,
3. before or after some surgeries,
4. to evaluate a change in bowel habits or bleeding or
5. to evaluate changes in the lining of the colon known as inflammatory disorders.

The rectum and colon must be completely emptied of stool for the procedure to be performed. Preparation consists of consumption of a special cleansing solution and clear liquids prior to the examination. Your surgeon or his staff will give you instructions regarding the cleansing routine to be used. Follow Dr Simmons’s instructions carefully! If you do not complete the preparation, it may be unsafe to perform the colonoscopy and the procedure may have to be rescheduled. If you are unable to take the preparation, contact Dr Simmons. Most medications can be continued as usual. You will most likely be sedated during the procedure and an arrangement to have someone drive you home afterward is imperative. Sedatives will affect your judgment and reflexes for the rest of the day. You should not drive or operate machinery until the next day.

The procedure is usually well tolerated, but there is often a feeling of pressure, gassiness, bloating or cramping at various times during the procedure. Your surgeon will give you medication through a vein to help you relax and better tolerate any discomfort that you may experience. You will be lying of your side or your back while the colonoscope is advanced through the large intestine. The lining of the colon is examined carefully while inserting and withdrawing the instrument. The procedure usually lasts for 15 to 60 minutes. In rare instances the entire colon cannot be visualized, and your surgeon could request a barium enema.

If your surgeon sees an area that needs more detailed evaluation, a biopsy may be obtained and submitted to a laboratory for analysis. Placing a special instrument through the colonoscope to sample the lining of the colon does this. Polyps are generally removed. Most polyps are benign (non-cancerous), but your surgeon cannot always tell by the appearance alone. They can be removed by burning (fulgurating) or by a wire loop (snare). It may take your surgeon more than one sitting to do this if there are numerous polyps or they are very large. Sites of bleeding can be identified and controlled by injecting certain medications or coagulating (burning) the bleeding vessels. Biopsies do not imply cancer however, removal of a colonic polyp is an important means of preventing Colo-rectal cancer.

Dr Simmons will explain the results to you after your procedure or at your follow up visit. You may have some mild cramping or bloating from the air that was placed into the colon during the examination. This should quickly improve with the passage of the gas. You should be able to eat normally the same day and resume your normal activities after leaving the hospital. If you have been given medication during the procedure, you will be observed until most of the effects of the sedation have worn off (1-2 hours). If you do not remember what Dr Simmons told you about the examination or follow up instructions, call the office that day or the next to find out what you were supposed to do. If polyps were found during your procedure, you will need to have a repeat colonoscopy. Dr Simmons will decide on the frequency of your colonoscopy exams.

Colonoscopy and biopsy are safe when performed by surgeons who have had special training and are experienced in these endoscopic procedures. Complications are rare however, they can occur. They include bleeding from the site of a biopsy or polypectomy and a tear (perforation) through the lining of the bowel wall. Should this occur, it may be necessary for your surgeon to perform abdominal surgery to repair the intestinal tear. Blood transfusions are rarely required. A reaction to the sedatives can occur. It is important to contact your surgeon if you notice symptoms of severe abdominal pain, fevers, chills, or rectal bleeding of more than one-half cup. Bleeding can occur up to several days after a biopsy.