Colectomy is a surgical procedure to remove all or part of your colon. Your colon, also called your large intestine, is a long tube-like organ at the end of your digestive system. Colectomy may be necessary to treat or prevent diseases and conditions that affect your colon. There are various types of colectomy operations. Colectomy that involves removing the entire colon is called total colectomy. Colectomy to remove part of the colon may be called subtotal colectomy or partial colectomy. Removing the right or left portion of the colon is called hemicolectomy. Surgery to remove both the colon and rectum is called proctocolectomy. Colectomy surgery usually requires other procedures to reattach the remaining portions of your digestive system and permit waste to leave your body.
Colectomy is used to treat and prevent diseases and conditions that affect the colon, such as:
Bowel obstruction. A blocked colon is an emergency that may require total or partial colectomy, depending on the situation.
Bowel perforation. A torn colon is also an emergency that may require colectomy.
Colon cancer. Early-stage cancers may require only a small section of the colon to be removed during colectomy. Cancers at a later stage may require more of the colon to be removed.
Crohn’s disease. If medications aren’t helping you, removing the affected part of your colon may offer temporary relief from signs and symptoms.
Ulcerative colitis. Your doctor may recommend total colectomy if medications aren’t helping to control your signs and symptoms.
Preventive surgery. If you have a very high risk of colon cancer due to the formation of multiple precancerous colon polyps, you may choose to undergo total colectomy to prevent cancer in the future. Colectomy may be an option for people with inherited genetic conditions that increase colon cancer risk, such as familial adenomatous polyposis or Lynch syndrome.
Colectomy carries a risk of serious complications. Your risk of complications is based on your general health, the type of colectomy you undergo and the approach your surgeon uses to perform the operation. In general, complications of colectomy can include:
- Blood clots in the legs (deep vein thrombosis) and the lungs (pulmonary embolism)
- Bowel obstruction caused by scar tissue that forms after surgery
- Injury to organs near your colon, such as the bladder and small intestines
- Tears in the sutures that reconnect the remaining parts of your digestive system
You’ll spend time in the hospital after your colectomy to allow your digestive system to heal. Your health care team will also monitor you for signs of complications from your surgery. You may spend a few days to a week in the hospital, depending on your situation.
During the days leading up to your colon surgery, your doctor may ask that you:
Stop taking certain medications. Certain medications can increase your risk of complications during surgery, so your doctor will ask that you stop taking those medications before your surgery.
Fast before your surgery. Your doctor will give you specific instructions. You may be asked to stop eating and drinking several hours to a day before your procedure.
Drink a solution that clears your bowels. Your doctor may prescribe a laxative solution that you mix with water at home. You drink the solution over several hours, following the directions. The solution causes diarrhea to help empty your colon. Your doctor may also recommend enemas.
Take antibiotics. In some cases, your doctor may prescribe antibiotics to suppress the bacteria found naturally in your colon and prevent infection.
Take a shower. Shower before going to the hospital for your surgery. This may help reduce your risk of infection by cleaning germs from your skin. Your doctor may recommend that you use a particular soap or antibacterial skin wash.
Preparing for colectomy isn’t always possible. For instance, if you need an emergency colectomy due to bowel obstruction or bowel perforation, there may not be time to prepare.
On the day of your surgery, your health care team will take you to a preparation room. Your blood pressure and breathing will be monitored. You may receive an antibiotic medication through a vein in your arm.
You’re then taken to an operating room and positioned on a table. You’ll receive a general anesthesia medication to put you in a sleep-like state so that you won’t be aware during your operation.
The surgical team then proceeds with your colectomy. Colon surgery may be performed in two ways:
Open colectomy. Open surgery involves making a large incision in your abdomen to access your colon. Your surgeon uses surgical tools to free your colon from the surrounding tissue and cuts out either a portion of the colon or the entire colon.
Laparoscopic colectomy. Laparoscopic colectomy, also called minimally invasive colectomy, involves several small incisions in your abdomen. Your surgeon passes a tiny video camera through one incision and special surgical tools through the other incisions. The surgeon watches a video screen in the operating room as the tools are used to free the colon from the surrounding tissue. The colon is then brought out through a small incision in your abdomen. This allows the surgeon to operate on the colon outside of your body. Once repairs are made to the colon, the surgeon reinserts the colon through the incision.
The type of operation you undergo depends on your situation and your surgeon’s expertise. Laparoscopic colectomy may reduce the pain and recovery time after surgery. But not everyone is a candidate for this procedure. Also, in some situations your operation may begin as a laparoscopic colectomy, but complications may force your surgical team to convert to an open colectomy. Once the colon has been repaired or removed, your surgeon will reconnect your digestive system to allow your body to expel waste. Options may include:
Rejoining the remaining portions of your colon. The surgeon may stitch the remaining portions of your colon together in a procedure called anastomosis. Waste then leaves your body as before.
Connecting your small intestine to your anus. The surgeon may use a portion of your small intestine to create a pouch that is attached to your anus (ileoanal anastomosis). This allows you to expel waste normally, though you may have several watery bowel movements each day.
After surgery you’ll be taken to a recovery room to be monitored as the anesthesia wears off. Then your health care team will take you to your hospital room to continue your recovery. You’ll stay in the hospital until you regain bowel function. This may take a couple of days to a week. You may not be able to eat solid foods at first. You might receive liquid nutrition through a vein in your arm and then transition to drinking clear liquids. As your intestines recover, you can eventually add solid foods. If your surgery involved a colostomy or ileostomy to attach your intestine to the outside of your abdomen, you’ll meet with an ostomy nurse who will show you how to care for your stoma. The nurse will explain how to change the ostomy bag that will collect your waste. Once you leave the hospital, expect a couple of weeks of recovery at home. You may feel weak at first, but eventually your strength will return and you can get back to your normal routine.