- Blockage of the small intestine or large intestine, resulting from either lack of peristalsis or mechanical obstruction (e.g., by narrowing, foreign objects, or hernia).Obstruction near the start of the small intestine often causes vomiting. Near the end or in the large intestine, backed-up waste and swallowed air cause intestinal distention; the resulting pressure may cause necrosis (death of intestinal wall tissue). Waste products may escape into the bloodstream. Symptoms and treatment depend on the obstruction's nature and location.
* * *functional or mechanical blockage of the alimentary canal. Functional blockage occurs when the muscles of the intestinal wall fail to contract normally in the wavelike sequence (peristalsis) that propels the intestinal contents. Mechanical obstructions include a narrowing of the channel (stricture), adhesions, tumours, the presence of a foreign object, pressure from outside, hernia, volvulus, and intussusception. In a hernia a loop of intestine protruding from the abdomen may be compressed at the point where it passes through the abdominal wall. A volvulus is a twisting of the intestine upon itself, and an intussusception is the telescoping of a section of intestine into an adjacent portion.The loss of fluids and chemicals through vomiting is frequent with obstructions that are located high in the intestinal canal. Obstructions of the lower reaches of the small intestine (ileum) and of the large intestine are inaccessible to evacuation by vomiting. In such cases, the intestine above the obstruction becomes distended by accumulated material and swallowed air; the pressure in the intestinal channel may compromise the blood supply and cause death of tissue in the walls of the intestine, and the walls may become abnormally permeable, allowing noxious agents to escape into the abdominal cavity and the bloodstream. The signs and symptoms of intestinal obstruction, as well as the treatment, depend upon the nature of the obstruction and its location.
* * *
Look at other dictionaries:
Intestinal obstruction — Blockage of the intestine by infolding (intussusception), malformation, tumor, digestive problems, a foreign body, or inflammation. Symptoms can include crampy abdominal pain, lack of ability to eliminate normal feces, and eventually shock. On… … Medical dictionary
intestinal obstruction — noun blockage of the intestine (especially the ileum) that prevents the contents of the intestine from passing to the lower bowel • Syn: ↑ileus • Hypernyms: ↑obstruction, ↑blockage, ↑enteropathy … Useful english dictionary
intestinal obstruction — blockage of the intestines producing symptoms of vomiting, distension, and abdominal pain; failure to pass flatus or faeces (complete constipation) is usual. The causes may be acute (e.g. hernia) or chronic (e.g. tumours, Crohn s disease).… … The new mediacal dictionary
Distal intestinal obstruction syndrome — (DIOS) involves blockage of the intestines by thickened stool and occurs in individuals with cystic fibrosis. DIOS was previously known as meconium ileus equivalent, a name which highlights its similarity to the intestinal obstruction seen in… … Wikipedia
distal intestinal obstruction syndrome — a complication of cystic fibrosis consisting of obstruction of the intestine by thickened feces; it resembles meconium ileus but lasts throughout life … Medical dictionary
Непроходимость Кишечника (Intestinal Obstruction) — нарушение проходимости кишечника; основными симптомами в этом случае являются рвота, вздутие живота и боли в нем; обычно также наблюдается нарушение отхождения газов и каловых масс (полная непроходимость). Причина непроходимости кишечника может… … Медицинские термины
Intestinal pseudoobstruction — Classification and external resources ICD 9 560.89 OMIM 155310 DiseasesDB … Wikipedia
Intestinal malrotation — Classification and external resources ICD 10 Q43.3 ICD 9 751.4 … Wikipedia
Intestinal pseudo-obstruction — Symptoms of intestinal obstruction with no sign of actual physical obstruction. This condition may be due to problems with the nerves that control intestinal muscles or other causes. Treatment depends on the cause. * * * a condition characterized … Medical dictionary
Obstruction — Contents 1 Medical 2 Sports 3 Other Obstruction may refer to: Obstruction theory, in mathe … Wikipedia