An enterocutaneous fistula (ECF) is an aberrant connection between the intra-abdominal gastrointestinal (GI) tract and skin/wound. Because of differences in management and significant preponderance of small intestinal and colonic fistulae, fistulae originating in the rectum, upper GI tract, or pancreas will not be discussed in this article.There are several ways in which ECF has been classified, including by output, etiology, and source.1-3 Most often, a high-output ECF is characterized as one with >500 mL/24 hours, low output <200 mL/24 hours, and a moderate output fistula between 200 and 500 mL/24 hours. While the great majority of ECFs are iatrogenic (75-85%), between 15 and 25% occur spontaneously. 3 Common causes of iatrogenic ECF are trauma; operations for malignancy, associated with extensive adhesiolysis, or in the setting of inflammatory bowel disease (IBD); and trauma. 1 With respect to postoperative small bowel fistulae, about half are from an anastomotic leak, with the other half occurring from inadvertent injury to the small bowel during dissection.3 Spontaneous fistulae occur from IBD (most common), malignancy, appendicitis, diverticulitis, radiation, tuberculosis/actinomycosis, and ischemia.
3Organ of origin is another classification used for ECF and is useful as well in the consideration of management options: type I (abdominal, esophageal, gastroduodenal), type II (small bowel), type III (large bowel), and type IV (enteroatmospheric, regardless of origin).
2Closure rates without operative intervention in the era of advanced wound care and parenteral nutrition (PN) vary considerably in reports 19 to 92%, 4,5 with most studies demonstrating closure rates in the 20 to 30% range.
5-11With historical wound care measures, 90% of spontaneous closure occurred in the first month after sepsis resolution, with an additional 10% closing in the second month, and none closing spontaneously after 2 months. 10 With vacuum assisted closure (VAC) and other negative pressure wound therapies (NPWT) therapy, there are case reports of fistulae closure well into the second and third month. ►Table 1 cites favorable and unfavorable prognostic factors for spontaneous fistula closure. 3,4,6,8,[12][13][14] Mortality rates in different series for patients with ECF are also markedly variable in distribution (5.5-33%), 4,7,15 with most deaths attributable to sepsis, malnutrition, and fluid/ electrolyte disturbances. 4,6,7,15,16 Factors that are predictive of high mortality are infectious and noninfectious complications, high-output fistula, 1,8,15,17 and age. 18 Cost of fistula care is significant and typically more than $500,000.
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Approach to Enterocutaneous FistulaA common acronym used to describe ECF care protocol is "SNAP," which stands for management of skin and sepsis, nutrition, definition of fistula anatomy, and proposing a Keywords ► enterocutaneous fistula ► enteroatmospheric fistula ► spontaneous closure ► mortality ► timeline
AbstractManagement of enterocutaneous fistula represents one of the most protracted and...