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Nutrition Assessment and Post-Surgical Advancement


Nutrition Assessment and Post-Surgical Advancement Rebecca Cohen, MS, RD, LDN Transplant Dietitian Tulane Transplant Institute – PowerPoint PPT presentation

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Title: Nutrition Assessment and Post-Surgical Advancement

Nutrition Assessment and Post-Surgical
  • Rebecca Cohen, MS, RD, LDN
  • Transplant Dietitian
  • Tulane Transplant Institute

Nutrition and Surgery
  • Reported 40 incidence of malnutrition in acute
    hospital setting
  • Malnutrition may compound the severity of
    complications related to a surgical procedure
  • A well-nourished patient usually tolerates major
    surgery better than a severely malnourished
  • Malnutrition is associated with a high incidence
    of operative complications and death.

Normal Nutrition (
The Newest Food Guide
  • Teaches ? Balancing Calories   ? Enjoy your
    food, but eat less   ? Avoid oversized portions  
  • Foods to Increase   ? Make half your plate fruits
    and vegetables   ? Make at least half your grains
    whole grains   ? Switch to fat-free or low-fat
    (1) milk    
  • Foods to Reduce   ? Compare sodium in foods like
    soup, bread, and frozen meals and choose the
    foods with lower numbers   ? Drink water instead
    of sugary drinks       
  • Website http//
  • Includes interactive tools including a
    personalized daily food plan and food tracker

  • Limited storage capacity, needed for CNS
    (glucose) function
  • Yields 3.4 kcal/gm
  • Recommended 45-65 of total caloric intake
  • Simple vs Complex

  • Major endogenous fuel source in healthy adults
  • Yields 9 kcal/gm
  • Too little can lead to essential fatty acid
    (linoleic acid) deficiency and increased risk of
  • Recommended 20-30 of total caloric intake

  • Needed to maintain anabolic state (match
  • Yields 4 kcal/gm
  • Must adjust in patients with renal and hepatic
  • Recommended 10-35 of total caloric intake

Normal Nutrition Requirements
  • HEALTHLY male/female
  • Caloric intake 25-30 kcal/kg/day
  • Protein intake 0.8-1gm/kg/day (max150gm/day)
  • Fluid intake 30 ml/kg/day

Unless medical state warrants fluid restriction
Reasons for Malnutrition
  • Inadequate nutritional intake
  • Metabolic response
  • Nutrient losses
  • Protein/energy store depletion
  • Prevalence of ileus, anorexia, malabsorption
  • Extraordinary stressors (surgical stress,
    hypovolemia, bacteremia, medications)
  • Wound healing
  • Anabolic state
  • May require appropriate vitamins

Nutrition Comparison
SURGERY PATIENT Caloric intake Mild
stress 25-30 kcal/kg/day Moderate
stress 30-35 kcal/kg/day Severe stress 30-40
kcal/kg/day Protein intake 1-2 gm/kg/day Fluid
HEALTHLY 70 kg MALE Caloric intake 25-30
kcal/kg/day Protein intake 0.8-1gm/kg/day Fluid
intake 30 ml/kg/day
  • Synthesized in and catabolized by the liver
  • Normal range 3.5-5 g/dL
  • Half-life 20 days

Pros Cons
Ranked as the strongest predictor of surgical outcomes Lack of specificity due to long half-life
Inverse relationship between postoperative morbidity and mortality compared with preoperative serum albumin levels Not accurate in pts with liver disease (elevated Tbili) or during inflammatory response (elevated WBC or CRP)
  • Synthesized by the liver and partly catabolized
    by the kidneys
  • Normal range16-40 mg/dL
  • Values of lt16 mg/dL are associated with
  • Half-life 2-3 days

Pros Cons
Shorter half life than albumin More expensive than albumin
More favorable marker of acute change in nutritional status (compared to albumin) Levels may be increased in the setting of renal dysfunction, corticosteroid therapy, or dehydration
A baseline prealbumin is useful as part of the initial nutritional assessment if routine monitoring is planned Over-hydration can decrease prealbumin levels result in false negative
Nitrogen Balance
  • Measures net changes in body protein mass
  • Nitrogen Balance protein intake (gm) - (UUN 4)
  • 6.25
  • Healthy individuals nitrogen balance (-1 to 1)

Positive Value Negative Value
Found during periods of growth, tissue repair, or pregnancy Associated with burns, fevers, wasting diseases and other serious injuries, during periods of fasting
Intake of nitrogen into the body is greater than the loss of nitrogen from the body Amount of nitrogen excreted from the body is greater than nitrogen intake
Increase in the total body pool of protein Often seen following major surgery Patient will likely require extra protein for tissue building
Postoperative Diet Advancement
  • Delay feeds for 24-48 hours until bowel sounds
    function return
  • Begin with clear liquids
  • Supply fluids and electrolytes
  • Require minimal digestion and stimulation of GI
  • Intended for short-term use due to inadequacy of
    nutritional needs

Clear Liquid Diet
  • Acceptable food items
  • Water (plain, carbonated or flavored)
  • Fruit juices without pulp, such as apple or white
  • Fruit-flavored beverages, such as fruit punch or
  • Plain gelatin
  • Tea or coffee without milk or cream
  • Strained tomato or vegetable juice
  • Sports drinks
  • Clear, fat-free broth
  • Hard candy, such as lemon drops or peppermint
  • Ice pops without milk, bits of fruit, seeds or
    nuts (except red)

Diet Advancement cont.
  • Advance diet to full liquids
  • Middle step
  • Meet daily calorie and protein needs
  • Acceptable food items
  • Coffee, tea, cream, carbonated beverages
  • Fruit and vegetable juices
  • Milk Milkshakes
  • Nutritional supplements
  • Custard-style yogurt, pudding, custard
  • Plain ice cream, sherbet, sorbet
  • Jell-o (any flavor)
  • Cream soups, strained, cream of wheat, cream of
    rice, grits
  • Pureed soups Tomato puree
  • Gravy, margarine
  • Sugar, syrup, jelly, honey

Diet Advancement cont.
  • Advance diet to solid foods
  • Appropriate to introduce solids as soon as the GI
    tract is functioning liquids are tolerated
  • Diets available
  • Regular
  • Pediatric
  • Heart healthy
  • ADA/Diabetic
  • Renal
  • Low sodium (2 gm)
  • Bland/Soft/Low residue

Key considerations
  • Condition of the GI tract
  • Disease state
  • Complications that may have resulted from surgery
  • Ex diabetes in a post-kidney transplant patient.
  • For liquid diets, patients must have adequate
    swallowing functions, as determined by SLP
  • Mechanical soft
  • Pureed
  • Thicken liquids
  • Must be specific in writing liquid diet orders
    for patients with dysphagia

Nutrition Support Options
  • Length of time a patient can remain NPO without
    complications is unknown
  • Tulane Protocol NPO gt 4 days
  • Two types of nutritional support
  • Enteral
  • Parenteral

Enteral Nutrition
  • Liquid mixture designed to meet nutrient needs
  • Goal rates are individidualized
  • Given through a tube in the stomach or small
  • Nasogastric tube
  • Nasoduodenal tube
  • Nasojejunal tube
  • Gastrostomy/Jejunostomy
  • Continuous or Bolus feeds
  • Specialized formulas for select disease states
  • Glucerna
  • Suplena
  • Nepro
  • Elemental formulas

Indications Contraindications
Functioning GI tract Severe acute pancreatitis
Adaptive phase of short bowel syndrome High output enteric fistula distal to feeding tube
Following severe trauma or burns Inability to gain access
Intractable vomiting or diarrhea
Aggressive therapy not warranted
Gastric vs. Small Bowel
  • If you dont use it, you lose it.
  • Indications to consider small bowel access
  • Gastroparesis
  • Recent abdominal surgery
  • Sepsis
  • Significant gastroesophageal reflux (GERD)
  • Aspiration risk
  • Mild ileus
  • Proximal enteric fistula or obstruction

Short-term vs Long-term
  • No standard of care for cut-off time between
    short-term and long-term access
  • Long-term access should be considered if the
    patient is expected to require nutrition support
    longer than 6-8 weeks
  • NG tubes can be used for long term enteral
  • However, complications can include
  • Non-elective extubation
  • Tube misplacement
  • Occasional need to check position of the tube

Choosing Appropriate Formulas
Polymeric Monomeric/elemental Disease specific
Basic Info Uses whole proteins as nitrogen source Predigested nutrients most have a low fat content or high of MCT Specific formulas for Respiratory disease Diabetes Renal failure Hepatic failure Immune compromise
Consider for patients with Normal or near normal GI function Impaired GI function Specific disease states
Tulane Enteral Nutrition Product Formulary
Enteral Nutrition Guidelines
  • Gastric feeding
  • Small bowel feeding
  • Continuous feeding only do not bolus due to risk
    of dumping syndrome
  • Start slowly _at_ 20 mL/hour
  • Advance in increments of 20 mL q 8 hours to goal
  • Do not check gastric residuals

Continuous feeding Bolus feeding
Start at rate 30 mL/hour Advance in increments of 20 mL q 8 hours to goal Check gastric residuals q 4 hour Start with 120 mL bolus Increase by 60 mL q bolus to goal volume Every 3-8 hours
Complications of Enteral Nutrition Support
  • Access
  • Administration
  • GI complications
  • Metabolic complications

Enteral Nutrition Case Study
  • 78-year-old woman admitted with new CVA
  • Significant aspiration detected on bedside
    swallow evaluation
  • SLP recommends strict NPO with alternate means of
  • PEG placed for long-term feeding access
  • Plan stabilize the patient and transfer her to a
    long-term care facility for rehabilitation

Enteral Nutrition Case Study (continued)
  • Height 54
  • Weight 130 / 59kg BMI 22
  • IBW 120 /- 10
  • Usual weight 130
  • Estimated needs
  • Calories?
  • Protein?
  • Fluid?

Enteral Nutrition Prescription
  • Jevity 1.2 (via PEG)
  • Initiate at 30 mL/hour, advance by 20 mL q 8
    hours to goal
  • Goal rate 55 mL/hour
  • 1584 kcal
  • 73g protein
  • 1069 mL free H2O, additional 515mL needed
  • Check residuals q 4 hours
  • hold feeds for residual gt 200 mL
  • Aspiration precautions

What is parenteral nutrition?
  • It is a special liquid mixture given into the
    blood via a catheter in a vein
  • Contains all the, carbohydrates, protein, fat,
    vitamins, minerals, and other nutrients needed
  • Light sensitive, always covered in a light
    resistant bag

Indications for TPN
  • Two criteria, need both
  • Malnourished patient expected to be unable to eat
    gt 5-7 days
  • Failed enteral nutrition trial per SLP
  • Appropriate tube placement
  • EN is contraindicated or severe GI dysfunction is
  • Ex paralytic ileus, mesenteric ischemia, small
    bowel obstruction, enteric fistula distal to
    enteral access sites

TPN (total parenteral nutrition) PPN (peripheral parenteral nutrition)
High glucose concentration (15-25 final dextrose concentration) Similar nutrient components as TPN, but lower concentration (5-10 final dextrose concentration)
Provides a hyperosmolar formulation (1300-1800 mOsm/L) Osmolarity lt 900 mOsm/L (maximum tolerated by a peripheral vein)
Must be delivered into a large-diameter vein May be delivered into a peripheral vein
Large fluid volumes needed to meet same calorie and protein dose as TPN (because lower in concentration)
Often used with other MNT and for a short period of time
Parenteral Access Devices
  • Peripheral venous access
  • Catheter placed percutaneouly into a peripheral
  • Central venous access (catheter tip in SVC)
  • Percutaneous jugular, femoral, or subclavian
  • Implanted ports (surgically placed)
  • PICC (peripherally inserted central catheter)

Writing TPN prescriptions
  • Determine total volume of formulation based on
    individual patient fluid needs
  • Determine amino acid content
  • Determine dextrose content
  • Determine lipid content
  • Check to make sure desired formulation will fit
    in the total volume indicated

Tulane TPN Order Form
Parenteral Nutrition Monitoring
  • Check electrolytes daily and adjust TPN/PPN
    additives accordingly
  • Check accu-check glucose q 6 hours
  • Check triglyceride level within 24 hours of
    starting TPN/PPN and weekly while patient remains
    on it

Parenteral Nutrition Monitoring (continued)
  • Check LFTs weekly
  • Check pre-albumin weekly
  • Acid/base balance
  • Increase/decrease chloride as needed
  • Bicarbonate is unstable in TPN/PPN prep
  • Precursoracetateis used

Complications of TPN/PPN
  • Hepatic steatosis
  • Usually benign in patients on short-term PN
  • Resolves in 10-15 days
  • Limiting fat content of PN to control steatosis
    in long-term use

Complications of TPN/PPN (continued)
  • Cholestasis
  • Due to no intestinal nutrients to stimulate
    hepatic bile flow
  • Gastrointestinal atrophy
  • Trophic enteral feeding to minimize/prevent GI

TPN/PPN Case Study
  • 55-year-old male admitted with small bowel
  • Complicated cholecystecomy 1 month ago. Since,
    poor po intake and 20 weight loss
  • NPO for 3 days since admit?right subclavian
    central line was placed
  • Plan start TPN since patient is expected to be
    NPO for at least 1-2 weeks

TPN/PPN Case Study(continued)
  • Height 60
  • Weight 155 / 70kg BMI 21
  • IBW 178 /- 10
  • Usual wt 175
  • Estimated needs
  • Calories?
  • Protein?
  • Fluid?

TPN/PPN Prescription
  • Amino acid 4.5 (or 45 g/liter)
  • Dextrose 17.5 (or 175 g/liter)
  • Lipid 20 285 mL over 24 hours
  • 2120 kcal, 90g protein (2 liters/24 hrs)
  • GIR 3.5 mg/kg/minute

Enteral Nutrition gt Parenteral Nutrition
Enteral Parenteral
Cost 10-20 per day 100 or more per day
Gut Preserves intestinal function May be associated with gut atrophy
Infection Very small risk of infection High risk/incidence of infection and sepsis
Miscellaneous Thoughts
  • Transitional feeds
  • PN?EN
  • PN/EN? oral feeds
  • Refeeding syndrome
  • Caused by intracellular movement when energy is
    provided after a period of starvation (usually gt
    7-10 days)
  • Hypomagnesaemia, hypokalemia, hypophosphatemia
  • Close monitoring of electrolytes
  • Initiate feeds slowly, work towards goal rate

Miscellaneous Thoughts
Under-feeding Over-feeding
Depressed ventilatory drive Hyperglycemia
Decreased respiratory muscle function Hepatic dysfunction from fatty infiltration
Impaired immune function Respiratory acidosis from increased CO2 production
Increased infection Difficulty weaning from the ventilator
  • Contact Information
  • Rebecca Cohen, MS, RD, LDN
  • Transplant Dietitian, Tulane Transplant Institute
  • (504) 988-1176

  • References
  • American Society for Parenteral and Enteral
    Nutrition. The Science and Practice of Nutrition
    Support. 2001.
  • Han-Geurts, I.J, Jeekel,J.,Tilanus H.W,
    Brouwer,K.J., Randomized clinical trial of
    patient-controlled versus fixed regimen feeding
    after elective abdominal surgery. British Journal
    of Surgery. 2001, Dec88(12)1578-82
  • Jeffery K.M., Harkins B., Cresci, G.A.,
    Marindale, R.G., The clear liquid diet is no
    longer a necessity in the routine postoperative
    management of surgical patients. American Journal
    of Surgery.1996 Mar 62(3)167-70
  • Reissman.P., Teoh, T.A., Cohen S.M., Weiss, E.G.,
    Nogueras, J.J., Wexner, S.D. Is early oral
    feeding safe after elective colorectal surgery? A
    prospective randomized trial. Annals of Surgery.
    1995 July222(1)73-7.
  • Ross, R. Micronutrient recommendations for wound
    healing. Support Line. 2004(4) 4.
  • Krauses Food, Nutrition Diet Therapy, 11th Ed.
    Mahan, K., Stump, S. Saunders, 2004.
  • American Society for Parenteral and Enteral
    Nutrition. The Science and Practice of Nutrition
    Support. 2001.