Mechanical Bowel Obstruction by Editorial Staff and ContributorsEn Español (Spanish Version)DefinitionCausesRisk FactorsSymptomsDiagnosisTreatmentPreventionDefinitionA mechanical bowel obstruction is a partial or complete blockage in the intestine. It can happen at any point along the intestine tract but it is more common in the small bowel. The small bowel is the upper part of the intestines and the large bowel is the lower part. When the bowel is blocked, food and liquid cannot pass through. Over time, food, liquid, and gas build up and cause pressure and pain. Some obstructions, when left untreated, can cut off the flow of blood to the intestine. This can lead to death of the intestine tissue and serious illness.Mechanical Bowel ObstructionCopyright © Nucleus Medical Media, Inc.CausesThe bowel is a muscular tube that is constantly moving to push food through. Blockage may be caused by something blocking the inside of the tube or something that stops the intestine from working well. Most small bowel blockages are due to scar tissue. This tissue connects the bowel to the abdominal wall or other organs. This makes it hard for the bowel to work as needed. Most large bowel obstructions are caused by tumors.Other causes of bowel obstructions include:Hernia—part of intestine pokes through abdominal wall and squeezes intestine shut Bowel inflammation or swelling Foreign matter in the intestinesImpacted feces—bulk of feces becomes trapped in the rectumVolvulus—twisting of the intestineIntussusception —when the intestine pulls inward into itself , most common cause in childrenRisk FactorsFactors that may increase your chances o a bowel obstruction:Previous gastrointestinal or gynecologic surgery—can lead to scarringDiverticulitisCrohn diseaseHirschsprung disease —in infants and children Cancer of the gastrointestinal tractSymptomsSymptoms of a bowel obstruction include:Abdominal painAbdominal swellingAbdominal crampsNauseaVomitingDiarrhea Severe constipationBloatingFeverFoul breath odorDiagnosisYou will be asked about your symptoms and medical history. A physical exam will be done. A stethoscope will be placed on your abdomen to listen for bowel sounds. Absent, or abnormal signs may suggest a bowel obstruction.Images will be needed to confirm the obstruction. This can be done with one or more of the following:Abdominal x-rayBarium enemaUltrasoundCT scan of the abdomenTreatmentBowel obstructions can be serious and life-threatening. Treatment may require hospitalization to provide support:IV fluids to stop dehydrationAntibiotics to help clear any infections The plan to remove the blockage will depend on where it is and what is causing it. Possible treatments include:Nasogastric tube—a tube is passed through your nose and down into the stomach. Fluids that have become trapped can be removed through this tube. Removal of fecal impaction—Feces trapped in the rectum can be manually loosened and removed.Endoscopy—A thin, lighted tube is inserted through the rectum and into the large intestine to straighten out the intestines. Surgery may be needed to: Remove scar tissue, tumors, foreign matter, and other causes of the blockages Repair herniasRemove damaged tissuePreventionPrevention of bowel obstruction depends on the cause. Some bowel obstructions cannot be prevented. To help reduce your chances of a bowel obstruction:Treat hernias promptly before they can cause a blockage. Decrease the chance of constipation by: Eating plenty of fiber-rich foodsDrinking plenty of fluidsExercising regularlyRESOURCES:American College of Gastroenterologyhttp://gi.orgNational Institute of Diabetes and Digestive and Kidney Diseaseshttps://www.niddk.nih.govCANADIAN RESOURCES:Canadian Digestive Health Foundationhttp://www.cdhf.caHealth Canadahttps://www.canada.caReferences:Acute intestinal pseudo-obstruction. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T114336/Acute-intestinal-pseudo-obstruction. Updated July 12, 2014. Accessed January 9, 2018. Bowel obstruction. UCSF Department of Surgery website. Available at: https://surgery.ucsf.edu/conditions--procedures/bowel-obstruction.aspx. Updated June 6, 2016. Accessed January 9, 2018.Jackson P, Raiji M. Evaluation and management of intestinal obstruction. Am Fam Physician. 2011;83(2):159-165.Last reviewed December 2017 by EBSCO Medical Review Board Daus Mahnke, MDPlease be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition. Copyright © EBSCO Publishing. All rights reserved.Editorial PolicyPrivacy PolicyTerms and ConditionsSupport