protein energy malnutrition abdelaziz elamin md, phd, frcpch professor of child health college of...
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PROTEIN ENERGY MALNUTRITION
Abdelaziz ElaminMD, PhD, FRCPCHProfessor of Child
HealthCollege of MedicineSultan Qaboos
UniversityMuscat, [email protected]
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HUMAN NUTRITION
Nutrients are substances that are crucial for human life, growth & well-being.
Macronutrients (carbohydrates, lipids, proteins & water) are needed for energy and cell multiplication & repair.
Micronutrients are trace elements & vitamins, which are essential for metabolic processes.
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HUMAN NUTRITION/2
Obesity & under-nutrition are the 2 ends of the spectrum of malnutrition.
A healthy diet provides a balanced nutrients that satisfy the metabolic needs of the body without excess or shortage.
Dietary requirements of children vary according to age, sex & development.
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Assessment of Nutr status
Direct Clinical Anthropometric Dietary Laboratory
Indirect Health statistics Ecological variables
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Clinical Assessment
Useful in severe forms of PEMBased on thorough physical
examination for features of PEM & vitamin deficiencies.
Focuses on skin, eye, hair, mouth & bones.
Chronic illnesses & goiter to be excluded
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Clinical Assessment/2
ADVANTAGES Fast & Easy to perform Inexpensive Non-invasive
LIMITATIONS Did not detect early cases Trained staff needed
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ANTHROPOMETRY
Objective with high specificity & sensitivity
Measuring Ht, Wt, MAC, HC, skin fold thickness, waist & hip ratio & BMI
Reading are numerical & gradable on standard growth charts
Non-expensive & need minimal training
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ANTHROPOMETRY/2
LIMITATIONS Inter-observers’ errors in
measurement Limited nutritional diagnosis Problems with reference
standards Arbitrary statistical cut-off
levels for abnormality
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LAB ASSESSMENT
Biochemical Serum proteins,
creatinine/hydroxyprolineHematological
CBC, iron, vitamin levelsMicrobiology
Parasites/infection
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DIETARY ASSESSMENT
Breast & complementary feeding details
24 hr dietary recallHome visitsCalculation of protein & Calorie
content of children foods.Feeding technique & food habits
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OVERVIEW OF PEM
The majority of world’s children live in developing countries
Lack of food & clean water, poor sanitation, infection & social unrest lead to LBW & PEM
Malnutrition is implicated in >50% of deaths of <5 children (5 million/yr)
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CHILD MORTALITY
The major contributing factors are: Diarrhea 20% ARI 20% Perinatal causes 18% Measles 07% Malaria 05%55% of the total have malnutrition
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EPIDEMIOLOGY
The term protein energy malnutrition has been adopted by WHO in 1976.
Highly prevalent in developing countries among <5 children; severe forms 1-10% & underweight 20-40%.
All children with PEM have micronutrient deficiency.
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PEM
In 2000 WHO estimated that 32% of <5 children in developing countries are underweight (182 million).
78% of these children live in South-east Asia & 15% in Sub-Saharan Africa.
The reciprocal interaction between PEM & infection is the major cause of death & morbidity in young children.
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PEM in Sub-Saharan Africa
PEM in Africa is related to: The high birth rate Subsistence farming Overused soil, draught & desertification Pets & diseases destroy crops Poverty Low protein diet Political instability (war & displacement)
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PRECIPITATING FACTORS
LACK OF FOOD (famine, poverty)
INADEQUATE BREAST FEEDING
WRONG CONCEPTS ABOUT
NUTRITION
DIARRHOEA & MALABSORPTION
INFECTIONS (worms, measles, T.B)
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CLASSIFICATION
A. CLINICAL ( WELLCOME ) Parameter: weight for age + oedema Reference tandard (50th percentile) Grades:
80-60 % without oedema is under weight 80-60% with oedema is Kwashiorkor < 60 % with oedema is Marasmus-Kwash < 60 % without oedema is Marasmus
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CLASSIFICATION (2)
B. COMMUNITY (GOMEZ) Parameter: weight for age Reference standard (50th
percentile) WHO chart Grades:
I (Mild) : 90-70II (Moderate): 70-60III (Severe) : < 60
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ADVANTAGES
SIMPLICITY (no lab tests needed)
REPRODUCIBILITY COMPARABILITY ANTHROPOMETRY+CLINICAL
SIGN USED FOR ASSESSMENT
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DISADVANTAGES
AGE MAY NOT BE KNOWN HEIGHT NOT CONSIDERED CROSS SECTIONAL CAN’T TELL ABOUT CHRONICITY WHO STANDARDS MAY NOT
REPRESENT LOCAL COMMUNITY STANDARD
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KWASHIORKOR
Cecilly Williams, a British nurse,
had introduced the word
Kwashiorkor to the medical
literature in 1933. The word is
taken from the Ga language in
Ghana & used to describe the
sickness of weaning.
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ETIOLOGY
Kwashiorkor can occur in infancy but
its maximal incidence is in the 2nd yr
of life following abrupt weaning.
Kwashiorkor is not only dietary in
origin. Infective, psycho-socical, and
cultural factors are also operative.
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ETIOLOGY (2)
Kwashiorkor is an example of lack of physiological adaptation to unbalanced deficiency where the body utilized proteins and conserve S/C fat.
One theory says Kwash is a result of liver insult with hypoproteinemia and oedema. Food toxins like aflatoxins have been suggested as precipitating factors.
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CLINICAL PRESENTATIONKwash is characterized by certain
constant features in addition to a variable spectrum of symptoms and signs.
Clinical presentation is affected by:• The degree of deficiency• The duration of deficiency The speed of onset The age at onset Presence of conditioning factors Genetic factors
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CONSTANT FEATURES OF KWASH
OEDEMA
PSYCHOMOTOR CHANGES
GROWTH RETARDATION
MUSCLE WASTING
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USUALLY PRESENT SIGNS
MOON FACE
HAIR CHANGES
SKIN DEPIGMENTATION
ANAEMIA
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OCCASIONALLY PRESENT SIGNS
HEPATOMEGALYFLAKY PAINT DERMATITISCARDIOMYOPATHY & FAILUREDEHYDRATION (Diarrh. & Vomiting)SIGNS OF VITAMIN DEFICIENCIES SIGNS OF INFECTIONS
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DD of Kwash Dermatitis
Acrodermatitis Entropathica ScurvyPellagraDermatitis Herpitiformis
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MARASMUS
The term marasmus is derived from the Greek marasmos, which means wasting.
Marasmus involves inadequate intake of protein and calories and is characterized by emaciation.
Marasmus represents the end result of starvation where both proteins and calories are deficient.
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MARASMUS/2
Marasmus represents an adaptive response to starvation, whereas kwashiorkor represents a maladaptive response to starvation
In Marasmus the body utilizes all fat stores before using muscles.
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EPIDEMIOLOGY & ETIOLOGY
Seen most commonly in the first year of life due to lack of breast feeding and the use of dilute animal milk.
Poverty or famine and diarrhoea are the usual precipitating factors
Ignorance & poor maternal nutrition are also contributory
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Clinical Features of Marasmus
Severe wasting of muscle & s/c fats
Severe growth retardationChild looks older than his ageNo edema or hair changesAlert but miserableHungryDiarrhoea & Dehydration
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CLINICAL ASSESSMENT
Interrogation & physical exam including detailed dietary history.
Anthropometric measurementsTeam approach with
involvement of dieticians, social workers & community support groups.
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Investigations for PEM
Full blood countsBlood glucose profileSeptic screeningStool & urine for parasites & germsElectrolytes, Ca, Ph & ALP, serum
proteinsCXR & Mantoux testExclude HIV & malabsorption
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NON-ROUTINE TESTS
Hair analysisSkin biopsyUrinary creatinine over proline
ratioMeasurement of trace elements
levels, iron, zinc & iodine
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Complications of P.E.M
HypoglycemiaHypothermiaHypokalemiaHyponatremiaHeart failureDehydration & shockInfections (bacterial, viral &
thrush)
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TREATMENT
Correction of water & electrolyte imbalance
Treat infection & worm infestationsDietary support: 3-4 g protein & 200 Cal
/kg body wt/day + vitamins & mineralsPrevention of hypothermiaCounsel parents & plan future care
including immunization & diet supplements
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KEY POINT FEEDING
Continue breast feeding Add frequent small feedsUse liquid dietGive vitamin A & folic acid on
admissionWith diarrhea use lactose-free or
soya bean formula
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PROGNOSIS
Kwash & Marasmus-Kwash have greater risk of morbidity & mortality compared to Marasmus and under weight
Early detection & adequate treatment are associated with good outcome
Late ill-effects on IQ, behavior & cognitive functions are doubtful and not proven
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THANKS YOU