protein energy malnutrition in ckd
TRANSCRIPT
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Protein Energy Malnutrition (PEM),
Protein-Energy Wasting (PEW)
Kidney Disease Wasting (KDW),
Kidney Disease-Related PEM By
Mabrouk Ramadan Al-SheikhProf. of nephrology and Internal Medicine
Faculty of MedicineTanta University
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زينتكم” خذوا آدم بني ياوكلوا مسجد كل عند
إنه تسرفوا وال واشربوا“ المسرفين يحب ال
العظيم الله صدق(31األعراف) -
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Eat right to feel and live right
Do not starve your patient
Let the food be the medicine and not let the medicine be the food. “Hippocrates”
لنأكل نعيش ال لنعيش، نأكل نحن
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Agenda Definition Prevalence Factors contributing to malnutrition Nutritional assessment Nutritional therapy Conclusion and Recommendations
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Agenda DefinitionPrevalence Factors contributing to malnutritionNutritional assessment Nutritional therapy Conclusion and Recommendations
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The International Society of Renal Nutrition and Metabolism (ISRNM) expert panel defined PEM (2012):
“state of decreased body stores of protein and energy fuels i.e. body protein and fat masses”
Definition
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DefinitionComponent of PEM are1. Clinical manifestations: unintentional poor
nutritional intake, unintentional BW loss, depleted energy (fat tissues) stores, and loss of somatic protein (low muscle mass).
2. Laboratory investigations: low level of visceral protein; s. albumin, prealbumin and transferrin and others.
3. Abnormal anthropometric measurements.
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Readily utilizable criteria for the clinical diagnosis of PEM in CKD
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Agenda DefinitionPrevalence Factors contributing to malnutritionNutritional assessment Nutritional therapy Conclusion and Recommendations
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Prevalence
Depending in part upon the method used and the population studied, up to 40 to 70 % of patients with end-stage renal disease are malnourished.
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Agenda DefinitionPrevalence Factors contributing to malnutritionNutritional assessment Nutritional therapy Conclusion and Recommendations
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Potential causes of PEM in patients with non-dialysis dependent CKD
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Potential causes of PEM in patients with non-dialysis dependent CKD
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Factors contributing to malnutritionMalnutrition can be secondary to : 1- Poor nutritional intake:
Overzealous dietary restrictions.
Delayed gastric emptying and diarrhea.
Intercurrent illness .
Hospitalization.
Other medical cormorbidities.
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Factors contributing to malnutritionMalnutrition can be secondary to :
1- Poor nutritional intakeMedication causing dyspepsia e.g. phos. binders, iron therapy .
Suppression of oral intake by PD load.
Inadequate dialysis
Decreased food intake on HD days
Monetary restriction
Depression
Altered taste sensation
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2- Increased protein losses
Gastrointestinal blood loss: “100ml blood = 14-17g protein.”
Intradialysis nitrogen loss: “ HD : 6-8 g amino acid/ procedure” “PD : 8-12 g protein/day”
Factors contributing to malnutrition
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3- Increased protein catabolism Intercurrent illness and hospitalizations. Metabolic acidosis. Catabolism associated with HD Catabolic effects of hormones “cortisol, PTH, glucagon”Dysfunction of GH and IGF endocrine axis.
Factors contributing to malnutrition
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Squeals of PEM
Malaise, fatigue, poor rehabilitation
Increase susceptibility to infection.
Impaired wound healing.
Increase hospitalization rate.
Increase morbidity and mortality rate.
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Agenda DefinitionPrevalence Factors contributing to malnutrition Nutritional assessment Nutritional therapy Conclusion and Recommendations
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ASSESSMENT OF NUTRITIONAL STATUS
No single gold standard measurement. Therefore, a panel of measurements is recommended and including:
1. Assessment of dietary nutritional intake2. Assessment of body composition.3. Laboratory values 4. Scoring
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ASSESSMENT OF NUTRITIONAL STATUS
No single gold standard measurement. Therefore, a panel of measurements is recommended and including:
1. Assessment of dietary nutritional intake2. Assessment of body composition.3. Laboratory values 4. Scoring
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I-Nutritional Intake
A- Patient’s interview• Often provides important clue to patients who might be
malnurished • Symptoms: nausea, vomiting, anorexia, fatigue, weight
loss or gain• Pharmacological therapy: steroid therapy, iron therapy
and phos. binder• Co-morbidity and non uremic diseases e.g. DM,
alcoholism, GI diseases.• Psychological issues.
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I-Nutritional IntakePhysical Examination Should include anthropometry The patient's actual BW is estimated and should be
compared to the recommended “dry or peer” body weight.
The percentile change (if any) of the "dry weight" should also be assessed approximately every month.
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I-Nutritional IntakeB- Assessment of food intake• Food questionnaire: the 24 h recall helps the patients to
remember food intake in the previous day and to quantate it.
• Food record: quantitative and qualitative data on food intake collected for an average 3 days including 2 two week day and one week end day (3 days should include dialysis and non-dialysis day).
• A food diary is very useful, especially if the patient weighs the portions of food. The intake of protein, fat and carbohydrate can then be calculated from standard food tables.
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I-Nutritional Intake
B- Assessment of food intake: The semi-quantitative food–frequency questionnaire
(SFFQ): is used to assess the frequency of consumption of food items and groups during a specific reference time period, which may or may not be the period the patient actually bases his(her) recalls on.
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I-Nutritional IntakeC-Protein equivalent of total nitrogen
appearance (PNA) & nPNA Calculating the protein catabolic rate (PCR)
is a good indirect index for dietary protein intake, expressed g/day.
KDOQI guidelines prefers the name: protein equivalent of total nitrogen appearance (PNA), expressed g/day.
Normalized nPNA ,expressed g/Kg/day.
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I-Nutritional IntakeC-Protein equivalent of total nitrogen
appearance (PNA) & nPNA Determination of nPNA: Calculated by
Formula Computer Program Target level =1.0-1.2 g/Kg/day. Best survival rate at level= 1.0-1.4 g/Kg/day. An increased overall mortality rate at level
<0.8 or>1.4 g/Kg/day.
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Interpretation of nPNA
Observation Interpretation ConsiderationnPNA exceeds DPI or is unexpectedly high
Only tentative conclusions about protein intake possible
Catabolic state:-Inadequate energy intake-Presence of inflammation or inflammatory stressors (fever, infection)-Weight loss- Metabolic acidosis-Bioincompatible dialysis membrane.Inaccurate diet recordLow lean body mass
nPNA less than DPI or is unexpectedly low
Only tentative conclusions about protein intake possible
Anabolic state: -Corticosteroid use- Recovery from infection or illness- Pregnancy or growthInaccurate diet recordEdema or excess body weight
nPNA=DPI nPNA reflects protein intake
Conclude patient is in nitrogen balance and nPNA reflects intake if none of the above apply
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ASSESSMENT OF NUTRITIONAL STATUS
No single gold standard measurement. Therefore, a panel of measurements is recommended and including:
1. Assessment of dietary nutritional intake2. Assessment of body composition.3. Laboratory values 4. Scoring
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II- Body composition
1- Body weight-based measures: BMI, weight for height, edema-free BW, fat-free BW.
2- Skin and muscle anthropometry: caliper, skin fold, extremity muscle mass.3- Total body elements: total body potassium.4- Energy-beam-based methods: total body N2,
DEXA, BIA, NIR.5- Other method: underwater weighting.
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A-BMIThe international classification of adult underweight, overweight and obesity
according to BMI
Classification BMI (kg/m2)
Underweight < 18.5
Severe thinness < 16
Moderate thinness 16-16.99
Mild thinness 17-18.49
Normal average 18.5-24.99
Overweight ≥ 25
Pre-obese 25-29.99
Obese ≥ 30
Obese class I 30-34.99
Obese class II 35-39.99
Obese class III ≥ 40
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B-Anthropometry
Aim: to compare peer (ideal or average) BW to the actual BW (special tables).
Anthropometry is practical, simple, rapid, non-invasive, non-expensive and reproducible technique for evaluating body fat and muscle mass.
It can be easily done by dietitian.
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B-AnthropometryK/DOQI guidelines :The anthropometric measurement that are valid for assessing
nutritional status:1. For body fat : triceps (or biceps) skin fold(TSF) .2. For muscle mass : mid arm muscle circumference (MAMC)
&mid arm circumference (MAC).3. For obesity : BMI4. % of usual body weight (UBW) and % of standard body
weight (SBW).This measures should be taken immediately post-dialysis at right side of the body; best carried out by the same observer
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As a general rule, the percentile values/normal
limitation to the use of anthropometry is that serial measurements are best carried out by the same observer
adequate nutrition Values >95 %
risk of malnutrition values 75 % and 95 % significant malnutrition
values <75 %
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More sophisticated measures of body composition include :
Bioelectric impedance analysis (BIA) Dual-energy x-ray absorptiometry (DEXA)
A major drawback of these techniques is the difficulty in distinguishing between fat mass and body water.
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At present, anthropometry is the only method that can be readily performed in most units.
BIA or DEXA should be reserved for selected patients.
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ASSESSMENT OF NUTRITIONAL STATUS
No single gold standard measurement. Therefore, a panel of measurements is recommended and including:
1. Assessment of dietary nutritional intake2. Assessment of body composition.3. Laboratory values 4. Scoring
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III-Laboratory evaluation
1. Visceral protein: negative acute phase reactants; albumin, prealbumin, transferrin and amino acids.
2. Lipids: chlosterol, TG and other lipids.3. Somatic protein and nitrogen surrogates: BUN
and serum creatinine.4. Growth factors: IGF-1 and liptin.5. Peripheral CBC, lymphocyts.6. Others.
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III-Laboratory evaluationI-Plasma protein measurements
Serum albumin Transferrin Prealbumin Amino acids
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I-Plasma protein measurements
Serum albumin Transferrin Prealbumin Amino acids
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I-Plasma protein measurementsSerum Albumin Clinical practice guidelines for nutrition were published by a working group for the NKF/DOQI recommended that the serum albumin concentration (obtained either predialysis or when stable) should be measured monthly.
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I-Plasma protein measurements
Serum Albumin Impact of Low serum albumin level: It is strong predictor of mortality and
hospitalization; risk rises dramatically and logarithmically as levels decline below 4.0 g/dL.
It has been shown to predict coronary calcification.
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I-Plasma protein measurements
Serum transferrin: Serum transferrin is not good indicator of nutritional
status; perhaps due to fluctuations in iron stores, presence of inflammation and changes in volume status.
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I-Plasma protein measurements
Prealbumin
The plasma concentration of prealbumin (has a shorter half-life than albumin) provides a consistent assessment of visceral protein and can be used to assess the response to nutritional interventions begun for presumed malnutrition as it.
This protein is normally excreted and metabolized by the kidney and tends to accumulate in renal failure.
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I-Plasma protein measurements PrealbuminValue < 30 mg/dL is indicative of malnutrition in the patients on maintenance hemodialysis.
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I-Plasma protein measurements Amino acids
There is a variable plasma amino acid pattern in ESRD.
In general, the levels of the essential and branched chain AA are decreased, while the nonessential AA are either within the normal range or increased.
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III-Laboratory evaluationII-Plasma cholesterol
concentration The plasma cholesterol concentration is reduced in
malnourished patients with normal renal function.
Cholesterol levels are also lower in patients with ESRDs. In this setting, there is an inverse relationship between mortality and the cholesterol concentration.
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III-Laboratory evaluationIII-Blood urea nitrogenReflects the balance between urea generation and removal Malnourished patients often show a gradual reduction in
BUN and become wasted.Low levels commonly seen in dialyzed patients (well
dialyzed or inadequately dialyzed) with poor nutrition. Low predialysis BUN levels have also been associated with
increased mortality. It is for this reason, protein catabolic rate is monitored in
dialysis patients, since this parameter can estimate protein intake in the stable patient.
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III-Laboratory evaluationIV-Creatinine productionSince creatinine is produced from nonenzymatic
creatine metabolism in skeletal muscle, estimating the rate of creatinine production has been used to assess lean body mass in stable patients.
Estimated lean body mass was below normal in 47 and 66 % of hemodialysis and peritoneal dialysis patients, a presumed reflection of inadequate nutrition.
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III-Laboratory evaluation V- C-Reactive protein A positive acute phase reactant protein. It correlates negatively with visceral protein
concentration. Help to uncover potential covert
inflammation especially if serum level of albumin or prealbumin is low.
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ASSESSMENT OF NUTRITIONAL STATUS
No gold standard measurement. Therefore, a panel of measurements is recommended and including:
1. Assessment of dietary nutritional intake2. Assessment of body composition.3. Laboratory values 4. Scoring
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Subjective global assessment (SGA)
• Conventional SGA is a simple method depends on the experience of clinician to make an overall evaluation of nutritional status.
• Advantages: includes objective data and several manifestations of poor nutritional status.
• Limitation: heavy reliance on the clinical judgment and the inability to tailor a specific nutritional therapy.
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Subjective global assessment (SGA)
This is a clinical method for evaluation of nutritional status; including:-
A- History and symptoms:1- % of weight loss in the last 6 months2- Dietary nutrient intake3- Presence of anorexia, nausea, vomiting, diarrhea or
abdominal pain4- Functional capacity5- Metabolic demands in the view of activity
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Subjective global assessment (SGA)
B-Physical parameters focus on:• Assessment of subcutanous fat.• Assessment of muscle wasting in the temporal
area, deltoid and quadriceps.• Presence of sacral or ankle odema.• Presence of ascites.
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Subjective global assessment (SGA) The SAG has good reproducibilty and correlates
well with outcome in ESRD.
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Indices of malnutrition in HD patients
1. S. albumin concentration < 4.0 gm/dl.2. Low s.prealbumin concentration (<30 mg/ dl)3. Low b. urea & s. creatinine level in patients
with residual renal function.4. PCR < 0.8gm/Kg/day.5. Chol. concentration<150mg/dl(3.9mmol/L).6. Transferrin <150 mg/dl.
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Indices of malnutrition in HD patients
7. IGF-1 concentration < 300 µg/L.8. Low predialysis serum K (and possibly
phosphororus) concentration. 9. Marked reduction in anthropometric
measurement 10. Continuous decline in estimated dry weight.11. BW < 80% of ideal weight.
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Agenda• Definition• Factors contributing to malnutrition• Disorders of nutrient metabolism in CKD• Nutritional assessment • Nutritional therapy• Conclusion and Recommendations
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Nutritional therapy Why malnutrition should be corrected? Many studies documented that poor
nutritional status increases the morbidity and mortality CKD patients.
Specifically; low s. creatinine ,albumin concentration and % of ideal dry BW at time of initiation of maintenance dialysis are associated with increased risk of morbidity and mortality during sub sequent years of HD.
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Why malnutrition should be corrected? PEM is one of the strongest predictors of mortality and morbidity and is the third of the killing triad in CKD and HD patients
1. CV accidents2. Infection
3. PEM
Nutritional therapy
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Interventions to prevent and/or treat malnutrition in advanced kidney failure
CKD patients:1- Close supervision and nutritional counseling (especially for patients on protein-restricted diets).2- Initiation of dialysis or kidney transplant in advanced CKD patients with apparent uremic malnutrition despite vigorous attempts to rectify it.
Maintenance dialysis patients:1- Appropriate amount of dietary protein (> 1.2 g/kg/day) and calorie (> 35 kcal/kg/day) intake.2- Optimal dose of dialysis (urea reduction ratio > 70%). Use of biocompatible hemodialysis membranes.3-Nutritional support in chronic dialysis patients who are unable to meet their dietary needs:a-Oral supplements.b-Tube feeds (if medically appropriate).c-Intradialytic parenteral nutritional supplements for HD patients.d-Amino acid dialysate for peritoneal dialysis patients.e-TPN
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Nutritional therapyStrategies for correction of malnutrition I. Dietary counseling, support and optimization.II. Adequate dialysis.III. Nutritional support in chronic HD patient who are
unable to meet their dietary needs: 1- Oral supplementation. 2- Tube feeding(if medically appropriate). 3- IDPN supplements for HD patients. 4- AA dialysate for PD patients. 5-Continuos total parenteral nutrition(TPN)
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Nutritional therapy
Other interventions 1. Correction of anemia, metabolic acidosis and SHPT.2. Anabolic agents :insulin, growth factor, or
androgenic anabolic steroid.3. Exercise.4. Treatment of inflammation :statin, vit E.5. Social work.6. Pharmacy support.7. Transplantation.
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Nutritional therapyDietary requirement The recommended average level of nutritional
intake are listed in the following table.
These recommendations are consistent with NKF ,KDOQI and EBP guidelines for nutrition for CKD patient.
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Recommended intakes of protein, energy, and minerals in kidney failure
Protein Energy Phosphorus Sodium
Chronic kidney disease-Stages 1-3 (GFR > 30 ml/min)-Stages 4-5 (GFR < 30 ml/min)
No restriction
0.60-0.75 g/kg/day
No restriction
35 kcal/kg/day
600-800 mg/day
600-800 mg/day
< 2 g/day
< 2 g/day
End-stage renal disease-Hemodialysis
- Peritoneal dialysis
> 1.2 g/kg/day
> 1.3 g/kg/day
35 kcal/kg/day
35 kcal/kg/day
600-800 mg/day
600-800 mg/day
< 2 g/day
< 2 g/day
Acute renal failure-No dialysis
- Dialysis
1-1.2 g/kg IBW/day1-1.2 g/kg IBW/day
35 kcal/kg/day
35 kcal/kg/day
600-800 mg/day
600-800 mg/day
< 2 g/day
< 2 g/day
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Recommended vitamin intake for patients receiving maintenance hemodialysis
Thiamine (B1) 1.1–1.2 mg/day Riboflavin (B2) 1.1–1.3 mg/day Niacin 14–16 mg/day Pantothenic Acid 5 mg/dayVitamin B6 10 mg/day Vitamin B12 2.4 mg/day Biotin 30 mcg/day Vitamin C 75–90 mg/dayFolic acid 1 mg/dayZinc 15 mg/day
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Nutritional therapyNeeds for individualizationAdherence to the renal diet is difficult & stressful.Prescribed diet should be individualized to help every patient
in the terms of: cost, palatability, comorbidities and cultural eating habits.
Too many restriction should be avoided as they may lead to poor intake.
Reinforcement by all members of the family and medical stuff.
Compliance should be assessed on regular basis even monthly .
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Strategies to enhance oral intake
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Adequacy of dialysis
Early referral to dialysis is very crucial. Optimal dose of dialysis(URR>70%). Use of biocompatible HD membrane. Keep KT/V =1-1.2 An important consensus: Adequate dialysis coupled with good nutrition is
the main pillar for best quality of life.Adequate dialysis corrects uremia & anorexia which
enhance nutrition.
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Peer rather than actual BW
Protein and caloric recommendation should be based on the peer BW for healthy subjects of the same age, sex, height and body frame size as the patients.
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Agenda DefinitionPrevalence Factors contributing to malnutritionNutritional assessment Nutritional therapy Conclusion and Recommendations
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Recommendation
• Understanding and application of the nutritional principles.
• Periodic assessment of nutritional status (once/ month) should be part of the routine care of CKD and dialysis patients to permit early recognition.
• Providing and institution of appropriate therapy for the best improvement of nutrition status .
• Renal dietitian should be a member of the medical personals.
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Take home message
• PEM is underappreciated, although it largely preventable and completely curable.
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DهDلDلDا DمDكDاDزDجخDيDرDاً
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Recommended intakes of protein, energy, and minerals in kidney failure
Protein Energy Phosphorus Sodium
Chronic kidney disease-Stages 1-3 (GFR > 30 ml/min)-Stages 4-5 (GFR < 30 ml/min)
No restriction
0.60-0.75 g/kg/day
No restriction
35 kcal/kg/day
600-800 mg/day
600-800 mg/day
< 2 g/day
< 2 g/day
End-stage renal disease-Hemodialysis
- Peritoneal dialysis
> 1.2 g/kg/day
> 1.3 g/kg/day
35 kcal/kg/day
35 kcal/kg/day
600-800 mg/day
600-800 mg/day
< 2 g/day
< 2 g/day
Acute renal failure-No dialysis
- Dialysis
1-1.2 g/kg IBW/day1-1.2 g/kg IBW/day
35 kcal/kg/day
35 kcal/kg/day
600-800 mg/day
600-800 mg/day
< 2 g/day
< 2 g/day
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Recommended vitamin intake for patients receiving maintenance hemodialysis
Thiamine (B1) 1.1–1.2 mg/day Riboflavin (B2) 1.1–1.3 mg/day Niacin 14–16 mg/day Pantothenic Acid 5 mg/dayVitamin B6 10 mg/day Vitamin B12 2.4 mg/day Biotin 30 mcg/day Vitamin C 75–90 mg/dayFolic acid 1 mg/dayZinc 15 mg/day
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Recommended daily dietary intake for adultpatients on maintenance hemodialysis
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VitaminsEBPG nutrition, NDT 2007
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A conceptual model for etiology of PEW inCKD and direct clinical implications.
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Response to reduced dietary protein andenergy intake.
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Response to reduced dietary protein andenergy intake.
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Response to reduced dietary protein andenergy intake.
• (A) Normal response. Reduced dietary protein and energy drive an increase in hunger and
• a fall in REE, loss of protein preferentially from the visceral organs, and increased insulin sensitivity of muscle.The liver and kidney provide glucose, and serum albumin is maintained at a normal level.
• (B) Response with PEW. During PEW, the adaptations to increase hunger and lower REE are blunted in part by an increased half-life of leptin and ghrelin and in part by inflammation and dialysis. The loss of protein occurs preferentially from muscle because of the effects of metabolic acidosis, glucocorticoids, and inflammation, leading to increased insulin resistance. Dialysis results in the loss of amino acids, stimulating muscle protein breakdown. Under the influence of inflammation and metabolic acidosis, the liver makes glutamine for deamination in the kidney, increases acute-phase reactants, and reduces serum albumin. The kidney increases glucose production from glutamine under the influence of metabolic acidosis.
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Potential causes of frailty and protein-energy wasting in elderly patients with end stage kidney disease.
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Clinical consequences of frailty and protein-energy wasting in elderly patients with end stage kidney disease.
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Potential preventive and therapeutic strategies for frailty and PEW in elderly ESRD patients
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Readily utilizable criteria for the clinical diagnosis of protein energy wasting in chronic kidney disease criteria
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Selected nutritional parameters for varying levels of kidney disease
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Strategies to enhance oral intake
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Potential causes of protein-energy wasting in patients with non-dialysis dependent chronic kidney disease
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Potential causes of PEM in patients with non-dialysis dependent CKD
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Potential causes of PEM in patients with non-dialysis dependent CKD
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Methods of evaluation for diagnosis of PEM in patients with non-dialysis- dependent CKD
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Schematic representation of the development of protein-energy wasting with advancing stages of CKD
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Selected nutritional parameters for varying levels of kidney disease (K/DOQI guidelines)
Nutritional Parameters
Stages 1-4 CKD Stage 5 Hemodialysis
Calories (kcal/kg/d) 30 – 35 35 - 60Protein (g/kg/d) 0.6 – 0.75 1.2Fat (% total kcal) For patients at risk for CVD, < 10% saturated
fat, 250-300 mg cholesterol/dSodium (g/d) < 2 2Potassium (g/d) Match to laboratory
values2 - 3
Calcium (g/d) 1.2 2 from diet and medicines
Phosphorus (mg/d) Match to laboratory values
800 – 1000
Fluid (ml/d) Unrestricted with normal urine output
1000 + urine