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Related Concept Videos

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Histology of the Small Intestine

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The small intestine exhibits a unique histological structure that significantly enhances its function in digestion and nutrient absorption. These structures include circular folds, villi, and various specialized cells that collectively facilitate the digestion of food.
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Surgical interventions for inflammatory bowel disease (IBD), which includes ulcerative colitis and Crohn's disease, are essential in managing symptoms and addressing complications. The selection of surgical procedures is contingent upon the specific conditions and complications that stem from these illnesses.
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Small Intestine01:15

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The small intestine is primarily responsible for digestion and nutrient absorption. It spans from the pyloric sphincter to the ileocecal valve and connects to the large intestine.
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Esophageal varices often manifest as gastrointestinal bleeding episodes, presenting symptoms like hematemesis (vomiting of blood), hematochezia (passing fresh blood via the rectum), and melena (black, tarry stools). Other signs can include weight loss, anorexia, abdominal discomfort, jaundice, pruritus, altered mental status, and muscle cramps.
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Large Intestine

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The large intestine is divided into three main regions: the cecum, colon, and rectum. Extending from the ileocecal valve to the anus, it frames the small intestine on three sides.
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Related Experiment Video

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Postoperative Ileus Murine Model
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Bleeding from Small Intestine: No Man's Land.

Ara Sahakian1, Sang W Lee2, Joongho Shin2

  • 1Department of Medicine, Keck Medicine of University of Southern California, Los Angeles, California.

Clinics in Colon and Rectal Surgery
|January 10, 2020
PubMed
Summary

Small intestine bleeding, a cause of gastrointestinal bleeding, is often diagnosed and treated using advanced endoscopic tools. Nonoperative management is common, but surgery may be needed for refractory cases.

Keywords:
deep enteroscopyintraoperative enteroscopyvideo capsule endoscopy (VCE)

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Area of Science:

  • Gastroenterology
  • Minimally Invasive Surgery

Background:

  • Small intestine bleeding constitutes 5% of all gastrointestinal bleeding cases.
  • Historically, diagnosing and treating small bowel bleeding presented significant challenges.

Purpose of the Study:

  • To review the diagnostic and therapeutic approaches for small intestine bleeding.
  • To highlight the role of advanced endoscopic techniques and surgical interventions.

Main Methods:

  • Review of current literature on small intestine bleeding management.
  • Discussion of endoscopic modalities including video capsule endoscopy and deep enteroscopy.
  • Analysis of nonoperative (endoscopic hemostasis, embolization) and operative treatment strategies.

Main Results:

  • Advanced endoscopic tools enable accurate diagnosis and treatment in most cases, with low mortality and morbidity.
  • Nonoperative management, including endoscopic hemostasis and angiographic embolization, is effective but recurrence is common.
  • Surgery is reserved for refractory cases, bleeding from tumors, or hemodynamic instability, often requiring intraoperative enteroscopy for localization.

Conclusions:

  • Video capsule endoscopy and deep enteroscopy have revolutionized the diagnosis and treatment of small intestine bleeding.
  • A multidisciplinary approach combining endoscopic and, when necessary, surgical interventions optimizes patient outcomes.
  • Intraoperative enteroscopy is crucial for precise lesion localization during surgery when endoscopic marking is absent.