source: http://www.mayoclinic.org/diseases-conditions/intestinal-obstruction/home/ovc-20168459
Intestinal obstruction is a blockage that keeps food or liquid from passing through your small intestine or large intestine (colon). Causes of intestinal obstruction may include fibrous bands of tissue (adhesions) in the abdomen that form after surgery, an inflamed intestine (Crohn's disease), infected pouches in your intestine (diverticulitis), hernias and colon cancer.
Without treatment, the blocked parts of the intestine can die, leading to serious problems. However, with prompt medical care, intestinal obstruction often can be successfully treated.
Causes
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Intussusception
The most common causes of intestinal obstruction in adults are:
- Intestinal adhesions — bands of fibrous tissue in the abdominal cavity that can form after abdominal or pelvic surgery
- Colon cancer
In children, the most common cause of intestinal obstruction is telescoping of the intestine (intussusception).
Other possible causes of intestinal obstruction include:
- Hernias — portions of intestine that protrude into another part of your body
- Inflammatory bowel diseases, such as Crohn's disease
- Diverticulitis — a condition in which small, bulging pouches (diverticula) in the digestive tract become inflamed or infected
- Twisting of the colon (volvulus)
- Impacted feces
Complications
Untreated, intestinal obstruction can cause serious, life-threatening complications, including:
- Tissue death. Intestinal obstruction can cut off the blood supply to part of your intestine. Lack of blood causes the intestinal wall to die. Tissue death can result in a tear (perforation) in the intestinal wall, which can lead to infection.
- Infection. Peritonitis is the medical term for infection in the abdominal cavity. It's a life-threatening condition that requires immediate medical and often surgical attention.
Treating intussusception
A barium or air enema is used both as a diagnostic procedure and a treatment for children with intussusception. If an enema works, further treatment is usually not necessary.
Treatment for partial obstruction
If you have an obstruction in which some food and fluid can still get through (partial obstruction), you may not need further treatment after you've been stabilized. Your doctor may recommend a special low-fiber diet that is easier for your partially blocked intestine to process. If the obstruction does not clear on its own, you may need surgery to relieve the obstruction.
Treatment for complete obstruction
If nothing is able to pass through your intestine, you'll usually need surgery to relieve the blockage. The procedure you have will depend on what's causing the obstruction and which part of your intestine is affected. Surgery typically involves removing the obstruction, as well as any section of your intestine that has died or is damaged.
Alternatively, your doctor may recommend treating the obstruction with a self-expanding metal stent. The wire mesh tube is inserted into your colon via an endoscope passed through your mouth or colon. It forces open the colon so that the obstruction can clear.
Stents are generally used to treat people with colon cancer or to provide temporary relief in people for whom emergency surgery is too risky. You may still need surgery, once your condition is stable.
Treatment for pseudo-obstruction
If your doctor determines that your signs and symptoms are caused by pseudo-obstruction (paralytic ileus), he or she may monitor your condition for a day or two in the hospital, and treat the cause if it's known. Paralytic ileus can get better on its own. In the meantime, you'll likely be given food through a nasal tube or an IV to prevent malnutrition.
If paralytic ileus doesn't improve on its own, your doctor may prescribe medication that causes muscle contractions, which can help move food and fluids through your intestines. If paralytic ileus is caused by an illness or medication, the doctor will treat the underlying illness or stop the medication. Rarely, surgery may be needed to remove part of the intestine.
In cases where the colon is enlarged, a treatment called decompression may provide relief. Decompression can be done with colonoscopy, a procedure in which a thin tube is inserted into your anus and guided into the colon. Decompression can also be done through surgery.
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