Affects the entire thickness of the intestinal wall β Crohn's Disease
β οΈ Crohn's disease causes transmural inflammation, meaning inflammation can extend through the entire thickness of the intestinal wall.
β οΈ Transmural involvement distinguishes Crohn's disease from ulcerative colitis, which primarily involves the mucosa and submucosa.
β οΈ Deep inflammation can produce fissures, strictures, fistulas, and abscesses.
β οΈ The inflammation may occur anywhere from the mouth to the anus, although the terminal ileum and colon are frequently affected.
β οΈ Chronic transmural inflammation can cause bowel-wall thickening and narrowing of the intestinal lumen.
β οΈ Progressive narrowing can eventually contribute to intestinal obstruction.
β οΈ The deeper tissue involvement also explains why penetrating complications occur more frequently with Crohn's disease.
β οΈ Full-thickness intestinal inflammation is therefore a hallmark characteristic of Crohn's disease.
Toxic megacolon is a common complication β Ulcerative Colitis
β οΈ Toxic megacolon is a serious complication strongly associated with severe ulcerative colitis.
β οΈ Extensive colonic inflammation can cause the colon to become markedly dilated and unable to contract effectively.
β οΈ Clients may develop abdominal distention, tenderness, fever, tachycardia, and systemic toxicity.
β οΈ Severe inflammation increases the risk for colonic perforation, peritonitis, sepsis, and shock.
β οΈ Toxic megacolon represents an acute medical emergency requiring immediate recognition and treatment.
β οΈ The complication is particularly concerning during a severe or fulminant ulcerative colitis exacerbation.
β οΈ The nurse should closely monitor for increasing abdominal distention, worsening pain, fever, and changes in bowel activity.
β οΈ The strong association between severe colonic inflammation and toxic megacolon makes this characteristic most consistent with ulcerative colitis.
Nutritional deficiencies occur frequently β Crohn's Disease
β οΈ Nutritional deficiencies are common in Crohn's disease because inflammation frequently involves the small intestine, where many nutrients are absorbed.
β οΈ Inflammation of the terminal ileum can interfere with absorption of vitamin B12 and bile salts.
β οΈ Chronic diarrhea can further contribute to losses of fluids, electrolytes, and nutrients.
β οΈ Abdominal pain may cause clients to reduce food intake because eating can worsen gastrointestinal symptoms.
β οΈ Malabsorption may contribute to deficiencies in iron, folate, calcium, vitamin D, and other nutrients.
β οΈ Repeated intestinal inflammation or surgical resection can further reduce the available absorptive surface.
β οΈ Persistent nutritional deficiencies may lead to anemia, weakness, impaired healing, and weight loss.
β οΈ Frequent malabsorption and nutritional deficiencies are therefore more characteristic of Crohn's disease.
Healthy tissue is interspersed with areas of inflammation β Crohn's Disease
β οΈ Crohn's disease characteristically produces skip lesions, in which inflamed intestinal segments are separated by areas of normal tissue.
β οΈ The inflammatory process is therefore discontinuous rather than involving one uninterrupted segment of bowel.
β οΈ Skip lesions can occur at multiple locations throughout the gastrointestinal tract.
β οΈ Crohn's disease can affect any portion of the digestive tract from the mouth to the anus.
β οΈ The terminal ileum and proximal colon are particularly common sites of involvement.
β οΈ Endoscopic examination may reveal alternating regions of healthy and inflamed tissue.
β οΈ Ulcerative colitis differs because its inflammation generally progresses continuously from the rectum proximally through the colon.
β οΈ Interspersed healthy and inflamed intestinal tissue therefore strongly indicates Crohn's disease.
Can often cause severe weight loss β Crohn's Disease
β οΈ Significant weight loss frequently occurs in Crohn's disease because chronic intestinal inflammation interferes with digestion and nutrient absorption.
β οΈ Small-intestinal involvement can produce malabsorption, reducing the amount of nutrients available to the body.
β οΈ Chronic diarrhea can cause additional loss of nutrients, fluids, and electrolytes.
β οΈ Abdominal pain and cramping may cause clients to intentionally decrease their food intake.
β οΈ Persistent inflammation can increase metabolic demands while simultaneously reducing nutritional intake.
β οΈ Strictures or other intestinal complications may further interfere with adequate nutritional intake and absorption.
β οΈ These combined effects can result in malnutrition and substantial unintended weight loss.
β οΈ Severe weight loss is therefore particularly consistent with Crohn's disease.
Fistulas and perianal abscesses are rare β Ulcerative Colitis
β οΈ Fistulas and perianal abscesses are rare in ulcerative colitis because inflammation is generally limited to the superficial layers of the colon.
β οΈ Ulcerative colitis primarily affects the mucosa and submucosa rather than extending through the entire intestinal wall.
β οΈ Fistula formation usually requires deeper inflammation that penetrates through the bowel wall.
β οΈ Crohn's disease, in contrast, produces transmural inflammation that can create abnormal connections between the bowel and surrounding structures.
β οΈ Crohn's disease can consequently produce enterocutaneous, enteroenteric, enterovesical, and other types of fistulas.
β οΈ Perianal disease, including abscesses and fistulas, is also strongly associated with Crohn's disease.
β οΈ Their relative absence therefore supports ulcerative colitis rather than Crohn's disease.
β οΈ Rare fistulas and perianal abscesses are therefore most consistent with ulcerative colitis.