nutrition in malabsorption syndrome1
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NUTRITION IN NUTRITION IN MALABSORPTION MALABSORPTION SYNDROMESYNDROME
Boerhan HidayatDepartment of Child Health
Medical Faculty-Airlangga UniversityDr.Soetomo General Hospital
Surabaya
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What is “Malabsorption”?
The integrated processes of digestion and absorption have 3 phases:
• Luminal phase- dietary carbohydrates, proteins and fats are hydrolysed and solubilized largely by pancreatic and biliary secretions
•Mucosal phase - final hydrolysis and uptake by epithelial cells prior to cellular export
•Transport phase - absorbed nutrients enter vascular or lymphatic circulation
Disturbances of these processes lead to “malabsorption”
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Some causes of malabsorption
Luminal Mucosa Transport Inadequate mixing Mucosal damage Lymphatic disease e.g. post-gastric or disease e.g. lymphangiectasia
surgery e.g. resection coeliac disease
Enzyme deficiency Crohn’s disease e.g. pancreatic disease infections
Bile salt deficiency e.g. cholestasis deconjugation excessive loss
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Common luminal causes
• Post-gastric surgery • Chronic pancreatitis
• Bile salt deficiency -chronic liver disease - contaminated
bowel syndrome - ileal disease
(Crohn’s/resection)
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Common Intestinal Symptoms Intestinal gas and flatulence Constipation Diarrhea Steatorrhea Gastrointestinal strictures and
obstruction
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Normal Function GI
Absorption Most nutrients absorbed in jejunum Small amounts of nutrients absorbed
in ileum Bile salts & B12 absorbed in terminal
ileum Residual water absorbed in colon
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Principles of Nutritional Care Dietary modifications
To alleviate symptoms Correct nutritional deficiencies Address primary problem Must be individualized
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SteatorrheaDietary Modification
Increase kcal to meet needs, especially protein and carbohydrate
Control fat levelGive only level toleratedUse MCT oil to meet kcal needs with caution
Vitamin and mineral supplementsUse fat-soluble vitamins; add extra Ca, Mg, Zn, Fe
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SteatorrheaMCT Oil
8 to 10 carbons long Bile not needed for absorption Delivered to liver via blood 8.3 kcal/g
1 T = 116 kcal Expensive Increases osmolality of tube
feedings
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Celiac DiseaseGluten-Sensitive Enteropathy Adverse reaction to gluten—
gliadin fraction Intestinal mucosa damaged
—Malabsorption of nutrients—Iron deficiency—Osteomalacia—Growth failure—Projectile vomiting
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Celiac Disease−Cause
Algorithm content developed by John Anderson, PhD, and Sanford C. Garner, PhD, 2000. Updated by Peter L. Beyer, 2002.
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Celiac Disease−Pathophysiology
(Adapted from Bray GA. Gray DS, Obesity, part 1: Pathogenisis. West J Med 149:429, 1988; and Lew EA, Garfinkle L; Variations in mortality by weight among 750,000 men and women. J Clin Epidemiol 32:563, 1979.)
Algorithm content developed by John Anderson, PhD, and Sanford C. Garner, PhD, 2000. Updated by Peter L. Beyer, 2002.
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Celiac Disease−Medical and Nutritional Management
Algorithm content developed by John Anderson, PhD, and Sanford C. Garner, PhD, 2000. Updated by Peter L. Beyer, 2002.
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Celiac DiseaseGluten-Sensitive Enteropathy
TreatmentRemove gluten from the diet:
—Wheat —Rye—Buckwheat—Barley
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Tropical Sprue
Cause unknown; imitates celiac disease Results in atrophy and inflammation of villi Sx: diarrhea, anorexia, abdominal distention Rx: tetracycline, folate 5 mg/d, B12 IM
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Intestinal Brush Border Enzyme Deficiencies Lactose intolerance Causes: genetic or secondary deficiency of milk
sugar enzyme, lactase—Blacks, Asians, Native Americans—Aging: damage to GI tract
Dx: lactose tolerance test or breath hydrogen test
Rx: avoid large amounts of lactose(milk protein allergy requires milk-free diet);
take lactase enzyme; processed dairy sometimes OK
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Inflammatory Bowel Disease
Crohn’s disease or ulcerative colitis Both involve damage to the intestine Crohn’s: may damage either small or
large intestineDisease progression varies
Ulcerative colitis: begins at rectum and progresses up the large intestine
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Inflammatory Bowel Disease−Cause
Algorithm content developed by John Anderson, PhD, and Sanford C. Garner, PhD, 2000. Updated by Peter L. Beyer, 2002.
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Inflammatory Bowel Disease−Pathophysiology
Algorithm content developed by John Anderson, PhD, and Sanford C. Garner, PhD, 2000. Updated by Peter L. Beyer, 2002.
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Inflammatory Bowel Disease−Medical and Nutritional Management
Algorithm content developed by John Anderson, PhD, and Sanford C. Garner, PhD, 2000. Updated by Peter L. Beyer, 2002.
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Inflammatory Bowel Diseases
Rx:Diet depends on patient’s statusNutrition assessmentSelect route of feedingFiber is beneficial except during
flareups.
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Disorders of the Large Intestine
1. Irritable bowel syndrome—Common syndrome involving altered intestinal motility, increased sensitivity
of the GI tract, and increased awareness and responsiveness of the viscera to internal and external stimuli
—Alternating constipation and diarrhea, abdominal pain, and bloating
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Disorders of the Large Intestine —cont’d2. Diverticular disease
—Herniations of the colon, chronic diverticulosis, acute
diverticulitis—Diverticulosis
High-fiber diet: fruits, vegetables, whole grains (2 tsp bran daily)
—DiverticulitisLow-residue or elemental diet Possibly low-fat diet
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Disorders of the Large Intestine —cont’d
3. Colon cancer and polyps—Colon cancer is the second most
common cancer among US adults—Polyps are considered precursors of colon cancer.
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Short Bowel Syndrome Follows removal of more than two
thirds of small intestine Causes weight loss; diarrhea;
decreased transit time; malabsorption; dehydration; loss of electrolytes; hypokalemia
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Short Bowel Syndrome —cont’d Removal of ileocecal valve causes
more complications. Fat malabsorption frequent
SteatorrheaSaponify calcium, zinc, and magnesiumRemove ileum and lose B12 and bile salt absorption
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Short Bowel Syndrome —cont’d
Length of remaining small intestine Loss of ileum, especially distal one third Loss of ileocecal valve Loss of colon Disease in remaining segments(s) of
gastrointestinal tract Radiation enteritis Coexisting malnutrition Older age surgery
Factors Affecting Severity of Malabsorption, Number Factors Affecting Severity of Malabsorption, Number of Complications, and Dependence on Parenteral of Complications, and Dependence on Parenteral NutritionNutrition
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Short Bowel SyndromeNutritional Care Step 1
Parenteral only for most patients Step 2
Gradually introduce enteral nutrition.
Glutamine is an important nutrient for the gut.
Narcotic drugs for pain cause GI problems and should be evaluated.
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Short Bowel Syndrome Eventually the remaining bowel
increases absorptive surface, and problems decrease.
Nutrition support is designed to meet each patient’s needs.
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Other Bowel Diseases Irritable bowel syndrome
Alternating diarrhea and constipation Rx:
High-fiber diet: be careful with wheat bran
Elimination of stimulantsEvaluate for food allergies or
intolerances
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Blind Loop Syndrome Bacterial overgrowth from stasis in
intestine, obstruction, radiation enteritis, fistula, or surgical repair
Treatment (Rx):Appropriate needs for malabsorptionAntibiotics for bacterial overgrowth
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Diet Modification of Fiber in Diets
Restricted-fiber diet 5 to 10 g/day High-fiber diet 25 to 35 g/day Minimal-residue diet or elemental
formulas
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Causes of Constipation— Gastrointestinal
Diseases of the upper gastrointestinal tract—Celiac disease—Duodenal ulcer
Diseases of the large bowel resulting in: —Failure of propulsion along the colon
(colonic inertia)—Failure of passage though anorectal
structures (outlet obstruction) Irritable bowel syndrome Anal fissures or hemorrhoids Laxative abuse
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Causes of Constipation—Systemic
Side effect of medication Metabolic endocrine abnormalities, such as
hypothyroidism, uremia, and hypercalcemia
Lack of exercise Ignoring the urge to defecate Vascular disease of the large bowel Systemic neuromuscular disease leading to
deficiency of voluntary muscles Poor diet, low in fiber Pregnancy
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FistulaAbnormal Opening Between Organs
Causes: birth defects; trauma; inflammatory disease; malignant disease
Rx:For fluid lossFor electrolyte lossAggressive nutritional support
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Ileostomy or ColostomySurgical Opening of Intestine to Outside
Causes: ulcerative colitis; Crohn’s disease; colon cancer; trauma
Rx:Nutrition needs vary with location
and individualAvoid gas- or odor-forming foodsFluid and electrolyte needs
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Hemorrhoidectomy
Delay stool formation until healing can
take place Rx:
Minimal-residue diet or elemental diet After recovery
High-fiber diet to prevent
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High-Fiber Diets Most Americans = 10 – 15 g/day Recommended = 25 g/day More than 50g/day = no added
benefit, may cause problems
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Low- or Minimum Residue Diet
Foods completely digested, well absorbed Foods that do not increase GI secretions Used in:
Maldigestion Malabsorption Diarrhea Temporarily after some surgeries, e.g.
hemorrhoidectomy
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IBD Nutritional Management (acute)
Low-residue, low-fiber liquid diet “Bowel rest” with parenteral
nutrition Enteral nutrition may have
better success at inducing remission
Diet tailored to individual pt: Minimal residue for reducing diarrhea Limited fiber to prevent obstruction Small, frequent feedings Supplements , MCT with fat
malabsorption
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IBD Nutritional Management (chronic)
High protein, high calorie diet with oral supplements
Monitor vitamin-mineral status of iron, calcium, selenium, folate, thiamin, riboflavin, pyridoxine, vitamin B12, zinc, magnesium, vitamins A, D, E
High fiber diet as tolerated Avoid unnecessary restrictions
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Diverticulosis High fiber diet (increase gradually) Supplement with psyllium,
methylcellulose may be helpful 2 – 3 qt water daily with high fiber
intake Low fat diet may be helpful ? Avoid seeds, nuts, skins of plants
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Colon Cancer/Polyps: dietary risk factors
Increased meat intake, esp. red meats
Increased fat intake Low intakes of vegetables, high
fiber grains, carotenoids Low intakes of vits D, E, folate Low intakes of calcium, zinc,
selenium
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Colon Cancer/Polyps: possible dietary protective factors
Omega-3 fatty acids –fish oils, flaxseed, etc
Wheat bran Legumes Some phytochemicals (plants) Butyric acid – dairy fats,
bacterial fermentation of fiber in colon
Calcium
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Summary Lower GI conditions—important for
nutritional consequences Important to note where obstruction
or surgery has taken place to determine impact on specific nutrients
Most dramatic: short bowel syndrome, which may require long-term TPN
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Summary Food intolerances should be dealt
with individually Patients should be encouraged to
follow the least restrictive diet possible
Patients should be re-evaluated frequently and the diet advanced as appropriate