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Nutrition for Diseases of the Kidney. Functions of the Kidney. Excretion of metabolic waste through urine Water and Electrolyte Homeostasis Acid/base balance Maintenance of bone health Activation of vitamin D Calcium/phosphorus homeostasis Blood Pressure Regulation - PowerPoint PPT Presentation
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Functions of the KidneyFunctions of the Kidney
Excretion of metabolic waste through urineExcretion of metabolic waste through urineWater and Electrolyte Homeostasis Water and Electrolyte Homeostasis Acid/base balanceAcid/base balanceMaintenance of bone healthMaintenance of bone health– Activation of vitamin DActivation of vitamin D– Calcium/phosphorus homeostasisCalcium/phosphorus homeostasis
Blood Pressure RegulationBlood Pressure Regulation– Renin-Angiotensin-AldosteroneRenin-Angiotensin-Aldosterone
Stimulate red blood cell productionStimulate red blood cell production– ErythropoietinErythropoietin
Consequences of Kidney DiseaseConsequences of Kidney Disease
Decreased excretion of nutrients/wasteDecreased excretion of nutrients/wasteAbnormal calcium/phosphorus Abnormal calcium/phosphorus metabolism leading to bone diseasemetabolism leading to bone diseaseWeight loss and malnutritionWeight loss and malnutritionFluid and electrolyte imbalances Fluid and electrolyte imbalances Cardiovascular disease and mortalityCardiovascular disease and mortality
Uremic SyndromeUremic Syndrome
NauseaNausea
VomitingVomiting
Metallic tasteMetallic taste
ItchingItching
Lack of energyLack of energy
Goals of CKD ManagementGoals of CKD Management Achieve/maintain optimal nutritional status Prevent protein energy malnutrition Slow the rate of disease progression Prevention/treatment of complications and
other medical conditionsDM
HTN
Dyslipidemias and CVD
Anemia
Metabolic acidosis
Secondary hyperparathyroidism
Evidenced based clinical practice guidelines Evidenced based clinical practice guidelines – For all stages of kidney diseaseFor all stages of kidney disease– For related complicationsFor related complications
Glomerular Filtration RateGlomerular Filtration Rate
GFR = (140-age) X body weight (kg) X 0.85 if female [72 X serum creatinine (mg/dL)]
GFR of 100 approximates 100% kidney fxn
Normal GFR = 120 to 130 mL/min
Stages of Chronic Kidney DiseaseStages of Chronic Kidney DiseaseStage 1Stage 1 CVD risk reduction
Treat co-morbiditiesGFR > 90 ml/min
Stage 2Stage 2 Monitor progression GFR = 60-89 ml/min
Stage 3Stage 3 Evaluate
Test complicationsGFR = 30-59 ml/min
Stage 4Stage 4 Preparation for renal replacement therapy
GFR = 15-29 ml/min
Stage 5Stage 5 Renal replacement therapy (RRT)
GFR < 15ml/min
or on dialysis
Deterioration of Nutritional Status Begins Early
GFR 28 – 35 mL/min or greater Protein Energy Malnutrition (PEM) is often present at
the time patients begin dialysis. Malnutrition in pts beginning dialysis is a strong
predictor of poor clinical outcome
Medical Nutrition Therapy Medical Nutrition Therapy Recommendations (Stages 3 to 5)Recommendations (Stages 3 to 5)
Calories 30-35 kcals/kg IBW
Protein 0.6-0.8 gm/kg IBW
Sodium 1000-4000mg
Fluids Evaluate need to restrict
Potassium Evaluate need to restrict
Calcium <2000mg
Phosphorus 800-1000 mg
Vitamins Individualized
Optimal Nutritional StatusOptimal Nutritional Status
Albumin > 4.0 Stable, desirable dry weight Adequate fat stores and muscle mass Appropriate appetite and intake
Reverse epidemiology of obesity in dialysis Reverse epidemiology of obesity in dialysis patients compared with the general populationpatients compared with the general population
Kalantar-Zadeh K et al. Am J Clin Nutr 2005;81:543-554
Assessing Anemia in CDKAssessing Anemia in CDK
TESTTEST K/DOQI Goal
HgbHgb 11 to 12 mg/dL Hct can be falsely low due to fluid overload
Iron SATIron SAT > 20% Monthly test
FerritinFerritin 200-500 ng/mL Reflects tissue iron stores
Low AlbuminLow Albumin
Non-nutritional factors Infection Inflammation Co-morbidities Fluid overload Inadequate dialysis Blood loss Metabolic acidosis
CaloriesCalories
Recommended energy intake = 30 to 35 day kcals/kg
Spares body protein Maintains neutral nitrogen balancePromotes higher serum albumin levels
ChallengesDecreased appetite from uremiaVarious CKD dietary restrictionsFinding food sources for added calories
Dietary Protein Restriction…Dietary Protein Restriction…
Reduces nitrogenous waste
Reduces inorganic ions
Reduces metabolic/ clinical disturbance (uremia)
Slows rate of decline in GFR
K/DOQI protein guidelinesK/DOQI protein guidelines
(Average American Intake = 1.2 g per kg/day)
0.75 grams per kg/day for CKD stages 1 thru 3
0.6 grams per kg/day for CKD stages 4, 5
50% of the dietary protein should be HBV– HBV protein produces less nitrogenous waste
45 to 60 grams protein per day
No Protein Restriction for Dialysis Patients1.2 g per kg/day hemodialysis
– 10-12 grams lost per HD treatment
1.3 g per kg/day peritoneal dialysis
– 5-15 grams lost per PD treatment
Food
Carbohydrate4 kcals/g
Protein4 kcals/g
Fat9 kcals/g
1 cup milk 12 8 0 –10
1 oz meat 0 7 1 – 12
1 oz bread 15 3 0
1 cup veg 5 2 0
1 fruit 15 0 0
1 teaspoon fat/ oil
0 0 5
Protein in FoodsProtein in Foods1 oz meat, poultry, fish = 7 g– ¼ cup tuna– ½ cup beans, peas, or lentils– 2 Tablespoons peanut butter– 2 egg whites = 7 g
1 cup milk = 8 g– 1 oz cheese– 1/3 cup cottage cheese
1 cup veg = 2 g1 slice bread = 3 g– ½ cup rice or pasta– ½ cup cereal
Fruit, fats, sugars = 0
Challenges with High Protein FoodsChallenges with High Protein FoodsAlso high in phosphorus and potassiumAlso high in phosphorus and potassium
MilkMilk
CheeseCheese
BeansBeans
Peanut butterPeanut butter
How much protein?How much protein?
Lunch A– 2 slices bread– Chicken breast (3 oz)– Lettuce, tomato– Mayonnaise– 16 oz milk– banana
Lunch B– 2 slices bread– 1 oz chicken – Lettuce– Mayonnaise– Iced tea– apple
Nutritional InterventionsNutritional Interventions
Encourage patients to eatEncourage patients to eat– Adjust or liberalize diet as appropriateAdjust or liberalize diet as appropriate– Frequent small meals/snacksFrequent small meals/snacks
High protein foods first if they get full High protein foods first if they get full quicklyquickly
Calorie dense foodsCalorie dense foods
Consider use of nutritional supplementsConsider use of nutritional supplements
SupplementsSupplementsProtein PowderProtein Powder– Procel, Egg/ProProcel, Egg/Pro
Liquid ProteinLiquid Protein– Pro-Stat, ProSource, LiquicelPro-Stat, ProSource, Liquicel
Liquid NutritionalLiquid Nutritional– Ensure, Boost, EnliveEnsure, Boost, Enlive
Calorie DenseCalorie Dense– Ensure Plus, Boost PlusEnsure Plus, Boost Plus
Renal SpecificRenal Specific– Nepro with Carb Steady, Re/GenNepro with Carb Steady, Re/Gen– Novasource Renal, NutriRenalNovasource Renal, NutriRenal
SodiumSodiumDietary sodium restriction prevents:Dietary sodium restriction prevents:– Excessive thirstExcessive thirst
– EdemaEdema– HypertensionHypertension– CHFCHF
Sodium restriction = 2000 mg/daySodium restriction = 2000 mg/day– Range from 1000mg to 4000mgRange from 1000mg to 4000mg– Varies depending on co-morbiditiesVaries depending on co-morbidities– More liberal sodium with frequent dialysisMore liberal sodium with frequent dialysis
Sodium excretion falls at GFR < 20mL/minSodium excretion falls at GFR < 20mL/min
Sources of dietary sodiumSources of dietary sodium
Pre-prepared foods
Processed foods
Canned, bottled, packaged foods.
2 gram Sodium Diet…2 gram Sodium Diet…Fresh foods
Limit– Cured/pickled foods– Processed– Can/bottled/packaged– Instant cereals, mixes
Avoid salt substitutes (potassium chloride)
Flavor foods with spices, vinegar, lemon juice, pepper
PotassiumPotassiumPotassium Restriction IndicationsPotassium Restriction Indications– Urine output < 1 liter per dayUrine output < 1 liter per day– GFR < 10 mL/minGFR < 10 mL/min– ACE inhibitors, beta blockers, lasixACE inhibitors, beta blockers, lasix– Hyperglycemia Hyperglycemia – Serum potassium > 5.0 mEq/LSerum potassium > 5.0 mEq/L
Dietary Potassium Restriction = 2 grams/dayDietary Potassium Restriction = 2 grams/day
Serum Potassium Goal: 3.5- 5.0 mEq/LSerum Potassium Goal: 3.5- 5.0 mEq/L
Potassium in the DietPotassium in the Diet
High (> 400 mg/serving)High (> 400 mg/serving)– BananaBanana– PotatoPotato– AvocadoAvocado– Orange juiceOrange juice
Moderate (>200 mg/serving)Moderate (>200 mg/serving)– BerriesBerries– BroccoliBroccoli– TomatoTomato
Low Potassium Fruit & VegetablesLow Potassium Fruit & Vegetables
>100 mg/serving>100 mg/serving
– CranberriesCranberries– AppleApple– CornCorn– LettuceLettuce– PineapplePineapple– String beansString beans
How much potassium?How much potassium?
Lunch A– 2 slices bread– Chicken breast (3 oz)– Lettuce, tomato– Mayonnaise– 16 oz milk– banana
Lunch B– 2 slices bread– 1 oz chicken – Lettuce– Mayonnaise– Iced tea– apple
Altered Bone Turnover in CKDAltered Bone Turnover in CKD
Kidney Failure leads to…Kidney Failure leads to…
Decreased production of active Vit DDecreased production of active Vit D
Low serum calciumLow serum calcium
Phosphorus retentionPhosphorus retention
Elevated PTHElevated PTH
Secondary HyperparathyroidismSecondary Hyperparathyroidism
Mineral and Bone DisorderMineral and Bone Disorder
PhosphorusPhosphorus
High serum phosphorus Bone decalcification Soft tissue calcifications Hyperparathyroidism
Phosphorus restriction for GFR < 25mL/min Normal dietary phosphorus = 1000 to 1800 mg/day
Dietary restriction = 560 to 850 mg/day Phosphate binders:
Bind phosphorus in the GI tract Must take with meals
Phoslo (calcium containing) Renvela (Sevelamer) (calcium free) Fosrenol (chewable)
Phosphorus is Phosphorus is notnot found on the found on the
Nutrition Facts LabelNutrition Facts Label
High Phosphorous FoodsHigh Phosphorous FoodsDAIRY
Cheese
Milk
1 oz
½ cup
150 mg
120 mg
PROTEIN
Egg
Liver
Peanut butter
Salmon or tuna
Nuts
1 large
1 oz
2 Tbsp
1 oz
1 oz
100 mg
150 mg
120 mg
75 mg
100 mg
VEGETABLES
Baked beans
Soybeans
½ cup
½ cup
130 mg
160 mg
BREADS
Bran
Cornbread
Whole-grain bread
½ cup
2 inch square
1 slice
350 mg
200 mg
60 mg
BEVERAGES
Beer
Cola
12 oz can
12 oz can
50 mg
50 mg
Calcium in CKDCalcium in CKD
Maintain serum calcium 8.4 – 10.2 mg/dLMaintain serum calcium 8.4 – 10.2 mg/dL
Optimal < 9.6 mg/dLOptimal < 9.6 mg/dL
Dietary CalciumDietary Calcium1200 – 1500 mg/day (stages 3 and 4)1200 – 1500 mg/day (stages 3 and 4)
Calcimimetics: A new family of drugs (Sensipar)
Binds to calcium receptor
Decreases PTH
Active orally
Advantageous: Suppression of PTH without risk of hypercalcemia or hyperphosphatemia
FDA approved
Fluid RestrictionFluid Restriction CKD Stage 4 or 5 CKD Stage 4 or 5
Fluid: “any food that is liquid at room temp”Fluid: “any food that is liquid at room temp” Soup, gelatin, ice cream, popsiclesSoup, gelatin, ice cream, popsicles
Excess fluid buildupExcess fluid buildup– Edema, SOB, HTN, CHFEdema, SOB, HTN, CHF– Delays wound healingDelays wound healing
Fluid restriction estimations are based uponFluid restriction estimations are based upon– Urinary outputUrinary output– Disease stateDisease state– Treatment modality (dialysis, etc.)Treatment modality (dialysis, etc.)
Fluid Allowance TipsFluid Allowance Tips
Approx 48oz/dayApprox 48oz/day
Pre-measure mealtime liquidsPre-measure mealtime liquids
Drink very hot or very cold Drink very hot or very cold beveragesbeverages
Drinking from smaller cupsDrinking from smaller cups
Use spray bottle to mist mouthUse spray bottle to mist mouth
Freeze juice in ice cube tray Freeze juice in ice cube tray and eat like popsiclesand eat like popsicles
Vitamin & Mineral SupplementsVitamin & Mineral SupplementsDietary restrictions result in a diet deficient in nutrientsDietary restrictions result in a diet deficient in nutrients
Vitamin C 90 mg/dayVitamin C 90 mg/dayOver 75% of kidney disease patients have Over 75% of kidney disease patients have increased homocysteine levels. increased homocysteine levels. – Folic acid 1 mg/dayFolic acid 1 mg/day– BB66 5 mg/day 5 mg/day
No Vitamin A due to its accumulation in CKDNo Vitamin A due to its accumulation in CKDVitamin D in its active formVitamin D in its active form
1,25 dihydroxycholecalciferol1,25 dihydroxycholecalciferol
[1,25 (0H[1,25 (0H22)D)D33]]
Procrit and iron supplementationProcrit and iron supplementationSuggestion: Suggestion: NephrocapsNephrocaps
Herbal SupplementsHerbal Supplements
Use may be unsafe for CKD patientsUse may be unsafe for CKD patients– Poor clearancePoor clearance– Purity, safety, effectiveness unknownPurity, safety, effectiveness unknown– No regulation, no testing requirementsNo regulation, no testing requirements– Subject to contaminationSubject to contamination
LeadLeadmercurymercury
Herbs can interact with medicationsHerbs can interact with medications– Renal patients take > 10 meds/dayRenal patients take > 10 meds/day
Renal toxicityRenal toxicity– WormwoodWormwood– Horse chestnutHorse chestnut– SassafrasSassafras
Herbs with diuretic properties that Herbs with diuretic properties that may cause renal inflammationmay cause renal inflammation
Bucha leavesBucha leaves Juniper berriesJuniper berries Uva ursiUva ursi Parsley capsulesParsley capsules