© 2004, 2002 Elsevier Inc. All rights reserved. Enteral Nutrition Definition Nutritional support via placement through the nose, esophagus, stomach, or intestines (duodenum or jejunum) —Tube feedings —Must have functioning GI tract —IF THE GUT WORKS, USE IT! —Exhaust all oral diet methods first.

© 2004, 2002 Elsevier Inc. All rights reserved. Oral Supplements Between meals Added to foods Added into liquids for medication pass by nursing Enhances otherwise poor intake May be needed by children or teens to support growth

© 2004, 2002 Elsevier Inc. All rights reserved. Conditions That Require Other Nutrition Support Enteral —Impaired ingestion —Inability to consume adequate nutrition orally —Impaired digestion, absorption, metabolism —Severe wasting or depressed growth Parenteral —Gastrointestinal incompetency —Hypermetabolic state with poor enteral tolerance or accessibility

© 2004, 2002 Elsevier Inc. All rights reserved. Conditions That Often Require Nutritional Support

© 2004, 2002 Elsevier Inc. All rights reserved. Conditions That Often Require Nutritional Support – cont’d

© 2004, 2002 Elsevier Inc. All rights reserved. Conditions That Often Require Nutritional Support – cont’d

© 2004, 2002 Elsevier Inc. All rights reserved. Considerations in Enteral Nutrition 1.Applicable 2.Site placement 3.Formula selection 4.Nutritional/medical requirements 5.Rate and method of delivery 6.Tolerance

© 2004, 2002 Elsevier Inc. All rights reserved. Formula Selection The suitability of a feeding formula should be evaluated based on n Functional status of GI tract n Physical characteristics of formula (osmolality, fiber content, caloric density, viscosity) n Macronutrient ratios n Digestion and absorption capability of patient n Specific metabolic needs n Contribution of the feeding to fluid and electrolyte needs or restriction n Cost effectiveness n Functional status of GI tract n Physical characteristics of formula (osmolality, fiber content, caloric density, viscosity) n Macronutrient ratios n Digestion and absorption capability of patient n Specific metabolic needs n Contribution of the feeding to fluid and electrolyte needs or restriction n Cost effectiveness

© 2004, 2002 Elsevier Inc. All rights reserved. Enteral Formula Categories

© 2004, 2002 Elsevier Inc. All rights reserved. Factors to Consider When Choosing an Enteral Formula

© 2004, 2002 Elsevier Inc. All rights reserved. Enteral Access: Clinical Considerations Duration of tube feeding —Nasogastric or nasoenteric tube for short term —Gastrostomy and jejunostomy tubes for long term Placement of tube —Gastric —Small bowel

© 2004, 2002 Elsevier Inc. All rights reserved. Placement Site Access (medical status) Location (radiographic confirmation) Duration Tube measurements and durability Adequacy of GI functioning

© 2004, 2002 Elsevier Inc. All rights reserved. Enteral Tube Placement

© 2004, 2002 Elsevier Inc. All rights reserved. Advantages—Enteral Nutrition Intake easily/accurately monitored Provides nutrition when oral is not possible or adequate Costs less than parenteral nutrition Supplies readily available Reduces risks associated with disease state

© 2004, 2002 Elsevier Inc. All rights reserved. More Advantages— Enteral Nutrition Preserves gut integrity Decreases likelihood of bacterial translocation Preserves immunologic function of gut Increased compliance with intake

© 2004, 2002 Elsevier Inc. All rights reserved. Disadvantages—Enteral Nutrition GI, metabolic, and mechanical complications—tube migration; increased risk of bacterial contamination; tube obstruction; pneumothorax Costs more than oral diets Less “palatable/normal” Labor-intensive assessment, administration, tube patency and site care, monitoring

© 2004, 2002 Elsevier Inc. All rights reserved. Complications of Enteral Feeding Access problems (tube obstruction) Administration problems (aspiration) Gastrointestinal complications (diarrhea) Metabolic complications (overhydration)

© 2004, 2002 Elsevier Inc. All rights reserved. Aspiration Pneumonia Can result from enteral feeds High-risk patients —Poor gag reflex —Depressed mental status

© 2004, 2002 Elsevier Inc. All rights reserved. Reducing Risk of Aspiration Check gastric residuals if receiving gastric feeds Elevate head of the bed >30 degrees during feedings Postpyloric feeding —Nasoenteric tube placement may require fluoroscopic visualization or endoscopic guidance —Transgastric jejunostomy tube

© 2004, 2002 Elsevier Inc. All rights reserved. Rate and Method of Delivery* Bolus—300 to 400 ml rapid delivery via syringe several times daily Intermittent─300 to 400 ml, 20 to 30 minutes, several times/day via gravity drip or syringe Cyclic—via pump usually at night Continuous—via gravity drip or infusion pump *Determined by medical status, feeding route and volume, and nutritional goals

© 2004, 2002 Elsevier Inc. All rights reserved. Consideration of Physical Properties of Enteral Formulas Residue Viscosity —Size of tube is important Osmolality: consider protein source —Intact (do not affect osmolality)—soy isolates; sodium or calcium casein; lactalbumin —Hydrolyzed (more particles)—peptides or free amino acids

© 2004, 2002 Elsevier Inc. All rights reserved. Renal Solute Load Normal adult tolerance is 1200 to 1400 mOsm/L Infants and renal patients may tolerate less

© 2004, 2002 Elsevier Inc. All rights reserved. Lower Osmolality Large (intact) proteins Large starch molecules

© 2004, 2002 Elsevier Inc. All rights reserved. Higher Osmolality Hydrolyzed protein or amino acids Disaccharides

© 2004, 2002 Elsevier Inc. All rights reserved. Tolerance Signs and symptoms: —Consciousness —Respiratory distress —Nausea, vomiting, diarrhea —Constipation, cramps —Aspiration —Abdominal distention

© 2004, 2002 Elsevier Inc. All rights reserved. Tolerance—cont’d Other signs and symptoms —Hydration —Labs —Weight change —Esophageal reflux —Lactose/gluten intolerances —Glucose fluctuations

© 2004, 2002 Elsevier Inc. All rights reserved. How to Determine Energy and Protein kcal/ml x ml given= kcal % protein x kcal= kcal as protein kcal as protein x 1 g/4 kcal= g protein Example: Patient drinks 200 cc of a 15.3% protein product that has 1 kcal/ml 1 kcal/ml x 200 ml= 200 kcal % protein x 200 kcal= 30.6 kcal 30.6 kcal x 1g protein/4 kcal= 7.65 g protein 1 kcal/ml x 200 ml= 200 kcal % protein x 200 kcal= 30.6 kcal 30.6 kcal x 1g protein/4 kcal= 7.65 g protein

© 2004, 2002 Elsevier Inc. All rights reserved. Energy in Formulas 1 to 1.2 kcal/ml = usual concentration 2 kcal/ml = highest concentration

© 2004, 2002 Elsevier Inc. All rights reserved. Protein From 4% to 26% of kcal is possible 14% to 16% of kcal is usual 18% to 26% of kcal—considered to be high- protein solution

© 2004, 2002 Elsevier Inc. All rights reserved. Recommended Water Healthy adult: 1 ml/kcal or 35 ml/kg Healthy infant: 1.5 ml/kcal or 150 ml/kg Normal tube feeding: 1 kcal/ml; 80% to 85% water Elderly: consider 25 ml/kg with renal, liver, or cardiac failure; or consider 35 ml/kg if history of dehydration

© 2004, 2002 Elsevier Inc. All rights reserved. Sources of Fluid (“Free Water”) Liquids Water in food Water from metabolism With tube feeding, nurse will flush tube with water about 3 times daily—include this amount in estimated needs —Example: “flush with 200 cc tid”

© 2004, 2002 Elsevier Inc. All rights reserved. Administration: Feeding Rate Continuous method = slow rate of 50 to 150 ml/hr for 12 to 24 hours Intermittent method = 250 to 400 ml of feeding given in 5 to 8 feedings per 24 hours Bolus method = may give 300 to 400 ml several time a day (“push” is not desired)

© 2004, 2002 Elsevier Inc. All rights reserved. French Units—Tube Size Diameter of feeding tube is measured in French units 1F = 33 mm diameter Feeding tube sizes differ for formula types and administration techniques.

© 2004, 2002 Elsevier Inc. All rights reserved. Examples of Special Formulas Pediatrics Low residue High protein Volume restriction Diabetic Pulmonary/COPD

© 2004, 2002 Elsevier Inc. All rights reserved. Routes of Parenteral Nutrition Central access —TPN both long- and short-term placement Peripheral or PPN —New catheters allow longer support via this method limited to 800 to 900 mOsm/kg due to thrombophlebitis <2000 kcal required or <10 days

© 2004, 2002 Elsevier Inc. All rights reserved. PPN vs. TPN Kcal required (10% dextrose max. PPN conc.) Fluid tolerance Osmolarity Duration Central line contraindicated

© 2004, 2002 Elsevier Inc. All rights reserved. Venous Sites from Which the Superior Vena Cava May Be Accessed

© 2004, 2002 Elsevier Inc. All rights reserved. Advantages—Parenteral Nutrition Provides nutrients when less than 2 to 3 feet of small intestine remains Allows nutrition support when GI intolerance prevents oral or enteral support

© 2004, 2002 Elsevier Inc. All rights reserved. Indications for Total Parenteral Nutrition GI non functioning NPO >5 days GI fistula Acute pancreatitis Short bowel syndrome Malnutrition with >10% to 15 % weight loss Nutritional needs not met; patient refuses food

© 2004, 2002 Elsevier Inc. All rights reserved. Contraindications GI tract works Terminally ill Only needed briefly (<14 days)

© 2004, 2002 Elsevier Inc. All rights reserved. Calculating Nutrient Needs Avoid excess kcal (> 40 kcal/kg) Adults kcal/kg BW Obese—use desired BMI range or an adjusted factor

© 2004, 2002 Elsevier Inc. All rights reserved. Adjusted Body Weight Adjusted IBW for obesity Female: ([actual weight – IBW] x 0.32) + IBW Male: ([actual weight – IBW] x 0.38) + IBW

© 2004, 2002 Elsevier Inc. All rights reserved. Parenteral Components Carbohydrate glucose or dextrose monohydrate 3.4 kcal/g Amino acids 3, 3.5, 5, 7, 8.5, 10% solutions Fat 10% emulsions = 1.1 kcal/ml 20% emulsions = 2 kcal/ml

© 2004, 2002 Elsevier Inc. All rights reserved. Protein Requirements 1.2 to 1.5 g protein/kg IBW mild or moderate stress 2.5 g protein/kg IBW burns or severe trauma

© 2004, 2002 Elsevier Inc. All rights reserved. Carbohydrate Requirements Max g/kg BW/hr Excess glucose causes: Increased minute ventilation Increased CO2 production Increased RQ Increased O2 consumption Lipogenesis and liver problems

© 2004, 2002 Elsevier Inc. All rights reserved. Lipid Requirements 4% to 10% kcals given as lipid meets EFA requirements; or 2% to 4% kcals given as lineoleic acid Usual range 25% to 35% max. 60% of kcal or 2.5 g fat/kg

© 2004, 2002 Elsevier Inc. All rights reserved. Other Requirements Fluid—30 to 50 ml/kg Electrolytes Use acetate or chloride forms to manage acidosis or alkalosis Vitamins Trace elements

© 2004, 2002 Elsevier Inc. All rights reserved. Calculating the Osmolarity of a Parenteral Nutrition Solution 1. Multiply the grams of dextrose per liter by 5. Example: 50 g of dextrose x 5 = 250 mOsm/L 2. Multiply the grams of protein per liter by 10. Example: 30 g of protein x 10 = 300 mOsm/L 3. Fat is isotonic and does not contribute to osmolarity. 4. Electrolytes further add to osmolarity. Total osmolarity = = 500 mOsm/L

© 2004, 2002 Elsevier Inc. All rights reserved. Compounding Methods Total nutrient admixture of amino acids, glucose, additives 3-in-1 solution of lipid, amino acids, glucose, additives

© 2004, 2002 Elsevier Inc. All rights reserved. Administration Start slowly (1 L 1st day; 2 L 2nd day) Stop slowly (reduce rate by half every 1 to 2 hrs or switch to dextrose IV) Cyclic give 12 to 18 hours per day

© 2004, 2002 Elsevier Inc. All rights reserved. Monitoring and Complications Infection Hemodynamic stability Catheter care Refeeding syndrome

© 2004, 2002 Elsevier Inc. All rights reserved. Refeeding Syndrome Hypophosphatemia Hyperglycemia Fluid retention Cardiac arrest

© 2004, 2002 Elsevier Inc. All rights reserved. Document in Chart Type of feeding formula and tube Method (bolus, drip, pump) Rate and water flush Intake energy and protein Tolerance, complications, and corrective actions Patient education