Journal List > Korean J Gastroenterol > v.65(6) > 1007384

Kim: Enteral Nutritional Support in Gastrointestinal and Liver Diseases

Abstract

Nutritional support is important because malnutrition is a major contributor to increased morbidity and mortality, decreased quality of life, increased length of hospital stay, and higher healthcare costs. Patients with gastrointestinal disease are at an increased risk of nutritional deterioration due to therapeutic dietary restriction, fasting for the diagnostic tests, loss of appetite due to anorexia or altered nutritional requirement caused by the disease itself. Therefore, it is important that gastroenterologists are aware of the nutritional status of patients and plan a treatment strategy considering patient's nutritional status. Enteral nutrition is preferred to parenteral nutrition as it is more physiologic, has fewer complications, help to prevent mucosal atrophy and maintain gut barrier function, which decrease intestinal bacterial translocation. Hence, enteral nutrition has been considered to be the most effective route for nutritional support. In this article, we will review enteral nutrition (oral nutritional supplements, enteral tube feeding) as a treatment for the patients with gastrointestinal, liver and pancreatic disease at risk of malnutrition.

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Table 1.
Routes for Enteral Feeding
Site of delivery Access Feeding route Placement method
Stomach Transnasal Nasogastric tube Spontaneous passive placement
Duodenum   Nasoduodenal tube Using endoscopy
Jejunum   Nasojejunal tube Using fluoroscopy
  Percutaneous Gastrostomy tube Using endoscopy
  (gastro/enterostomy) Gastroduodenal tube Using fluoroscopy
    Gastrojejunal tube Surgical access
    Jejunostomy  
Table 2.
Recommendations for the Indication, Application and Type of Formula of Enteral Nutrition in Patients with Inflammatory Bowel Disease21 (Grade22)a
  Crohn's disease Ulcerative colitis
Indication Indications for enteral nutrition are: prevention and treatment of undernutrition, improvement of growth and development in children and adolescents, improvements in quality of life, acute phase therapy, perioperative nutrition, maintenance of remission in chronic active disease  
 Active disease In adults use enteral nutrition as sole therapy for the acute phase mainly when treatment with corticosteroids is not feasible. (A)
Use combined therapy (enteral nutrition and drugs) in undernourished patients as well as in patients with inflammatory stenosis of the intestine. (C)
In children with CD enteral nutrition is considered as the first line therapy. (C)
An influence of nutritional measures (nutritional counselling, oral nutritional supplements, tube feeding or parenteral nutrition) on the inflammatory activity in acute or in chronically active ulcerative colitis has not been demonstrated. Therefore, enteral nutrition is not recommended as treatment of active ulcerative colitis. (C)
 Maintenance of remission In case of persistent intestinal inflammation (e.g., steroid dependent patients) use oral nutritional supplements. (B)
In longstanding (>1 year) clinical remission and in the absence of nutritional deficits a benefit of enteral nutrition (oral nutritional supplements or tube feeding) or supplements (vitamins and trace elements) has not been demonstrated. (B)
Enteral nutrition is not recommended. (C)
 Peri-operative nutrition Use perioperative nutrition in CD patients with weight loss prior to surgery and low albumin. (C)  
 Undernutrition Enteral nutrition may improve the quality of life in undernourished CD patients. (C) Initiate nutritional support in patients with undernutrition or inadequate nutritional intake. (C)
Application Use tube feeding and/or oral nutritional supplements in addition to normal food to improve nutritional status and to eliminate consequences of undernutrition such as growth retardation. (A)
Correct specific deficits (trace elements, vitamins) by supplementation. (C)
Use continuous tube feeding rather than bolus delivery because of the lower complication rate. (B)
Treat specific deficiencies with supplements. (C)
Route Using oral nutritional supplements, a supplementary intake of up to 600 kcal/day can be achieved in addition to normal food. (A)
Use tube feeding if a higher intake is necessary. (C)
Tube feeding can be safely delivered by nasogastric tube or percutaneous endoscopic gastrostomy. (B)
 
Type of formula Active disease There are no significant differences in the effect of free amino acid, peptide-based and whole protein formulae for tube feeding. (A)
Free amino acid or peptide-based formulae are not generally recommended. (A)
Modified enteral formulae (fat modified, omega-3 fatty acids, glutamine, TGF--enriched) are not recommended because no clear benefits have been shown. (A)
The value of specific substrates (omega-3 fatty acids, glutamine, butyrate) on disease activity is controversial and not proven.

CD, Crohn's disease.

a (A) is assigned to recommendations which are based on at least one randomized controlled trial whereas the lowest recommendation (C) is based on expert opinion, including the view of the working groups.

Table 3.
Recommendations for the Application and Type of Formula of Enteral Nutrition in Patients with Liver Cirrhosis16 (Grade22) a
General Recommended energy intake: 35–40 kcal/kg/day (147–168 kJ/kg/day) (C)
Recommended protein intake: 1.2–1.5 g/kg/day (C)
Application Use supplemental enteral nutrition when patients cannot meet their caloric requirements through oral food despite adequate individualised nutritional advise. (A)
Route If patients are not able to maintain adequate oral intake from normal food, use
-Oral nutritional supplements or (C)
-Tube feeding (even in the presence of oesophageal varices) (A)
PEG placement is associated with a higher risk of complications and is not recommended. (C)
Type of formula Whole protein formulae are generally recommended. (C)
Consider using more concentrated high-energy formulae in patients with ascites. (C)
Use BCAA-enriched formulae in patients with hepatic encephalopathy arising during enteral nutrition. (A)
The use of oral BCAA supplementation can improve clinical outcome in advanced cirrhosis. (B)
Outcome Enteral nutrition improves nutritional status and liver function, reduces complications and prolongs survival in cirrhotics and is therefore recommended. (A)

PEG, percutaneous endoscopic gastrostomy; BCAA, branched chain amino acid.

a (A) is assigned to recommendations which are based on at least one randomized controlled trial whereas the lowest recommendation (C) s based on expert opinion, including the view of the working groups.

Table 4.
Recommendations for the Application and Type of Formula of Enteral Nutrition in Patients with Acute Pancreatitis36 (Grade22) a
Indication  
 Mild acute pancrease Enteral nutrition is unnecessary, if the patient can consume normal food after 5–7 days. (B)
  Enteral nutrition within 5–7 days has no positive impact on the course of disease and is therefore not recommended. (A)
  Give tube feeding, if oral nutrition is not possible due to consistent pain for more than 5 days. (C)
 Severe pancreatitis Use continuous enteral nutrition in all patients who tolerate it. (C)
 Severe necrotizing pancreatitis Enteral nutrition is indicated if possible. (A)
  Enteral nutrition should be supplemented by parenteral nutrition if needed. (C)
  In severe acute pancreatitis with complications (fistulas, ascites, pseudocysts) tube feeding can be performed successfully.
Application Tube feeding is possible in the majority of patients but may need to be supplemented by the parenteral route. (A)
  Oral feeding (normal food and/or oral nutritional supplements) can be progressively attempted once gastric outlet obstruction has resolved, provided it does not result in pain, and complications are under control. Tube feeding can be gradually withdrawn as intake improves. (C)
Route Try the jejunal route if gastric feeding is not tolerated. (C)
  In case of surgery for pancreatitis an intraoperative jejunostomy for postoperative tube feeding is feasible. (C)
  In gastric outlet obstruction the tube tip should be placed distal to the obstruction. If this is impossible, parenteral nutrition should be given. (C)
Type of formula Peptide-based formulae can be used safely. (A)
  Standard formulae can be tried if they are tolerated. (C)

a (A) is assigned to recommendations which are based on at least one randomized controlled trial whereas the lowest recommendation (C) is based on expert opinion, including the view of the working groups.

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