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Intestinal Obstruction
Alternate Names : Bowel Obstruction, Ileus, Intestinal Volvulus, Paralytic Ileus, Pseudo-Obstruction - Intestinal
DefinitionIntestinal obstruction involves a partial or complete blockage of the bowel that results in the failure of the intestinal contents to pass through.
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Overview, Causes, & Risk Factors
Obstruction of the bowel may be caused by ileus, in which the bowel doesn't function correctly but there is no "mechanical" (anatomic) problem, or by mechanical causes. Paralytic ileus, also called pseudo-obstruction, is one of the major causes of obstruction in infants and children.
The causes of paralytic ileus may include the following:
- Medications, especially narcotics
- Intraperitoneal infection
- Mesenteric ischemia (decreased blood supply to the support structures in the abdomen)
- Injury to the abdominal blood supply
- Complications of intra-abdominal surgery
- Kidney or thoracic disease
- Metabolic disturbances (such as decreased potassium levels)
Paralytic ileus may lead to complications causing jaundice and electrolyte imbalances. In the newborn, paralytic ileus that is associated with destruction of the bowel wall (necrotizing enterocolitis) is life-threatening and may lead to infecting the blood and lungs (pneumonia) in infants.
In older children, gastroenteritis may be a cause of paralytic ileus, which is sometimes associated with peritonitis and a ruptured appendix.
Paralytic ileus is marked by abdominal distention, absent bowel sounds (no noise heard when listening to abdomen) and relatively little pain (as compared to mechanical obstruction).
Mechanical obstruction occurs when movement of material through the intestines is physically blocked. The mechanical causes of obstruction are numerous and may include the following:
- Hernias
- Postoperative adhesions or scar tissue
- Impacted feces (stool)
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Gallstones
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Tumors blocking the intestines
- Granulomatous processes (abnormal tissue growth)
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Intussusception
- Volvulus (twisted intestine)
- Foreign bodies (ingested materials that obstruct the intestines)
If the obstruction blocks the blood supply to the intestine, the tissue may die, causing infection and gangrene. Risk factors for tissue death include intestinal malignancy, Crohn's disease, hernia, and previous abdominal surgery.
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• Definition
• Intestinal Obstruction Overview, Causes, & Risk Factors
• Intestinal Obstruction Symptoms & Signs
• Intestinal Obstruction Prevention
• Intestinal Obstruction Diagnosis & Tests
• Intestinal Obstruction Treatment
• Intestinal Obstruction Prognosis
• Intestinal Obstruction Complications
• Calling Your Health Care Provider
• Pictures & Images
Topics that might be of interest to you Diseases & Conditions
• Adhesion
• Cholelithiasis
• Crohn's Disease
• Intussusception (Children)
• Peritonitis
• Pneumonia
• Tumor
• Viral Gastroenteritis
Tests & Exams
• Abdominal Film
• Barium Enema
• CHEM-20
• Upper GI and Small Bowel Series
Other Topics
• Abdomen - Swollen
• Abdominal Pain
• Abdominal Sounds
• Breath Odor
• Constipation
• Diarrhea
• Gas/Flatus - Excessive
• Groin Lump
• Malignancy
• Nausea and Vomiting
Review Date : 11/7/2002
Reviewed By : Jenifer K. Lehrer, M.D., Department of Gastroenterology, Graduate Hospital, Philadelphia, PA, and Timothy Cruz, M.D., Department of Pediatrics, Kaiser Permanente, Los Angeles, CA. Review provided by VeriMed Healthcare Network.
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