(Adynamic Ileus; Paralytic Ileus; Nonmechanical Bowel Obstruction; Ogilvie’s Syndrome; Colonic Pseudo-obstruction)
DefinitionIleus is a type of non-mechanical bowel obstruction. It results when peristalsis stops. Peristalsis is the wavelike contractions that help push stool through the colon and small bowel.
|Small Bowel Distention|
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CausesIleus is caused by damage to the nerves controling the intestines from surgery, infection, low blood flow, trauma, medications or changes in the body chemistry.
Risk FactorsFactors that increase your risk of getting ileus include:
- Abdominal, joint, or spine surgery
- Intestinal injury or trauma
- Severe generalized trauma
- Abdominal bleeding.
- Infections, such as:
- Heart attack or stroke
- Imbalance of electrolytes, especially potassium and calcium
- Disorders that affect muscle function
- Use of certain drugs, such as narcotic pain drugs, high blood pressure medication, or chemotherapy
- A previous history of ileus
SymptomsSymptoms of ileus may include:
- Abdominal swelling
- Inability to pass stool or gas
DiagnosisYour doctor will ask about your symptoms and medical history. A physical exam and blood tests will be done. A diagnosis of ileus is usually based on symptoms and results of imaging studies.Images may be taken of your bodily structures. This can be done with:colonoscopy .
TreatmentIf ileus was caused by surgery, stress or trauma it will usually resolve within 48 to 72 hours. In other cases, the disease or abnormality that caused the ileus needs to be treated. This may involve adjusting the dose of or stopping a medication, treating an infection, or replacing electrolytes.Other treatments may be used to help ease symptoms. These may include:
Diet LimitationPatients who suffer from ileus should not be fed until the ileus has resolved.
Nasogastric Suction (NG Tube)A tube is inserted through the nose and into the stomach to remove digestive fluids. This will help relieve pain and bloating.
Intravenous Fluids and ElectrolytesFluids and electrolytes are given by vein to avoid dehydration.
MedicationsThere are medications that increase peristalsis, such as neostigmine and tegaserod, that can be used in selected patients to help ileus resolve.
Colonoscopic DecompressionA flexible tube may be inserted into the colon to relieve pressure.
SurgeryRarely, surgery is required if there is a perforation or other abnormality causing the ileus.
PreventionSince ileus is generally the result of injury, surgery, or a medical condition, there is little that can be done to prevent it.
American Gastroenterological Association
International Foundation for Functional Gastrointestinal Disorders
Canadian Digestive Health Foundation
The Canadian Association of Gastroenterology (CAG)
Colonic ileus. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated March 5, 2013. Accessed July 25, 2013.
Intestinal obstruction and ileus. Patient UK website. Available at: http://www.patient.co.uk/doctor/Intestinal-Obstruction-and-Ileus.htm. Updated April 20, 2010. Accessed July 25, 2013.
- Reviewer: Michael Woods, MD
- Update Date: 06/16/2014