Nutrition Screening and Assessment Nutrition 526: 2010.
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Transcript of Nutrition Screening and Assessment Nutrition 526: 2010.
Nutrition Screening and AssessmentNutrition 526: 2010
Steps to Evaluating Pediatric Nutrition Problems
• Screening• Assessment
– Data collection– Evaluation and
interpretation– Intervention– Monitor– reassessment
Nutrition Screening: Purpose
• To identify individuals who appear to have or be at risk for nutrition problems
• To identify individuals who require further assessment or evaluation
Screening: Definition
• Process of identifying characteristics known to be associated with nutrition problems
– ASPEN, Nutri in Clin Practice 1996 (5):217-228
• Simplest level of nutritional care (level 1)
– Baer et al, J Am Diet Assoc 1997 (10) S2:107-115
Examples of Screening risk factors
• Anthropometrics: weight, length/height, BMI
• Growth measures < than 5th %ile
• Growth measures > than 90th %ile
• Alterations in growth patterns– Change in Z-scores– Change 1-2 SD– Change percentiles
• Medical and developmental Conditions
• Medications• Improper or inappropriate
food/formula choices or preparation
• Psychosocial• Laboratory Values
Examples of Screening risk factors
• Jayden: – PG– Weight gain– Nutritional Practices
• Barbara:– Breastfeeding– Weight changes– Dietary practices– Infant feeding
practices
• Mark– Newborn– Weight loss– Breastfeeding
• Jake– 10 month old– Hct: 29
Assessment– Systematic process– Uses information gathered in screening– Adds more in depth, comprehensive data– Links information– Interprets data– Develops care plan– monitor– Reassess
Process
• Identify Problem or risk
• Identify Etiology
• Determine intervention
• Monitor and Reevaluate
Goals of Nutrition Assessment
• To collect information necessary to document adequacy of nutritional status or identify deficits
• To develop a nutritional care plan that is realistic and within family context
• To establish an appropriate plan for monitoring and/or reassessment
NCP: Nutrition Care Process
• Provides a framework for critical thinking
• 4 Steps– Assessment– Diagnosis– Intervention– Monitoring/Evaluation
NCP
• Assessment– Obtain, verify, interpret information– Data used might vary according to setting,
individual case etc…– Questions to ask
• Is there a problem?• Define the problem?• Is more information needed?
NCP
• Diagnosis– Identification or labling of problem that is
within RD practice to treat• Examples:
– Inadequate intake– Inadequate growth
Examples of Nutrition Diagnosis Options
• Altered GI Function• Altered nutrition related
laboratory values• Decreased nutrient needs• Evident malnutrition• Inadequate protein-
energy intake• Excessive oral intake• Increased energy
expenditure
• Increased nutrient needs• Involuntary weight loss• Overweight/obesity• Limited adherence to
nutrition related recommendations (vs food and nutrition related knowledge)
• Underweight• Food and medication
interactions
NCP:
• Diagnosis written as a PES statement
Problem/Etiology/Signs and symptoms
“Must be clear and concise. 1 problem
one etiology”
Examples of Screening risk factors
• Jayden: – PG– Weight gain– Nutritional Practices
• Barbara:– Breastfeeding– Weight changes– Dietary practices– Infant feeding practices
• Mark– Newborn– Weight loss– Breastfeeding
• Emma– 12 months– Weight @ 95th percentile– Diet information
• Jake– 10 month old– Hct: 29
NCP Process
Jayden, Barbara, Mark, Emma, Jake
NCP
• Intervention– Etiology drives the intervention
• Monitoring and Evaluation
Challenges and Pitfalls
Challenges
Nutrient needs influenced by:
genetics, activity, body composition, medical conditions and medications
Individuals anthropometric date influenced by:
genetics, body composition, development, history
Challenges• Identification of etiology
• Weighing risk vs benefit
• Supportive of:– Family– Individual– Development/temperament
Challenges
• Information– Availability– Accurate– Representative– complete
• Goals and expectations– Available– Evidence bases– applicable
Comprehensive Nutrition Assessment
• Collection of Nutritional data• Interpretation of data
– Linking information• Goals and expectations• Individual data• evidence
– Asking questions• individualized intervention• monitoring outcomes of
intervention
Potential Pitfalls
Excuses
Assumptions
Faulty reasoning
Incorrect or inaccurate information
Not evidence based
Biased
Information Collected: Current and Historical
• Growth• Dietary• Medical history• Diagnosis• Feeding and developmental information• Psychosocial and environmental information• Clinical information and appearance (hair, skin, nails,
eyes)• Other (laboratory)
Assessment Tools
Nutrition Assessment
• Tools of Assessment– Growth
• Measurements
• Growth charts
• Absolute size (percentile)
• Pattern
• Body composition
– Water, bone, muscle, fat
– Intake
– Additional information
– Intake• Food record, food
recall, analysis
– Additional information• Medical, • Development• Social• Laboratory• Other anthropometrics• etc
• Who is the regulator of growth?• Who regulates Intake?• What do measurements mean?
– Weight– Weight gain– Lab values– Intake information
Growth
Growth
• Growth is a dynamic process defined as an increase in the physical size of the body as a whole or any of its parts associated with increase in cell number and/or cell size
• Reflects changes in absolute size, mass, body composition
Growth
• A normal, healthy child grows at a genetically predetermined rate that can be compromised by imbalanced nutrient intake
Growth Assessment
• Progress in physical growth is one of the criteria used to assess the nutritional status of individuals
Absolute size
• Absolute size
• Body composition
• Growth/changes over time
Absolute size
Other Anthropometrics• Upper arm circumference, triceps
skinfolds
• Arm muscle area, arm fat area
• Sitting height, crown-rump length
• Arm span
• Segmental lengths (arm, leg)
All have limitations for CSHCN, but can be additional information for individual child
Body Mass Index for Age
• Body mass index or BMI: wt/ht2
• Provides a guideline based on weight, height & age to assess overweight or underweight
• Provides a reference for adolescents that was not previously available
• Tracks childhood overweight into adulthood
Guidelines to Interpretation of BMI
• Underweight –BMI-for-age <5th percentile
• At risk of overweight–BMI-for-age 85th percentile
• Overweight–BMI-for age 95th percentile
Interpretation of BMI
• BMI is useful for– screening– monitoring
• BMI is not useful for– diagnosis
Who might be misclassified?
• BMI does not distinguish fat from muscle– Highly muscular children may have a ‘high’
BMI & be classified as overweight– Children with a high percentage of body fat &
low muscle mass may have a ‘healthy’ BMI– Some CSHCN may have reduced muscle
mass or atypical body composition
Nutrient Analysis
• Fluid• Energy• Protein• Calcium/Phosphorus• Iron• Vitamin D• Other
Nutrient Needs
• Recommendations established for over 43 essential and conditionally essential nutrients
Basis of recommendations
• Basis
• Physiology– GI
– Renal
• Growth and Development
– Preventing deficiencies
– Meeting nutrient needs
• Water• Energy• Vitamin D• Iron
Dietary Information
• Collect data• Nutrient Analysis• Comparison with
recommendations, guidelines, evidence
• Link with additional information
• Interpret
Dietary Information
• Family Food Usage• 24 hour recall• Diet history• 3-7 day food record or diary• Food frequency• Other Information
– Food preparation, history, feeding observation, feeding problems, likes/dislikes, feeding environment
Approaches to Estimating Nutrient Requirements
• Direct experimental evidence (ie protein and amino acids)
• extrapolation from experimental evidence relating to human subjects of other age groups or animal models– ie thiamin--related to energy intake .3-.5 mg/1000 kcal
• Breast milk as gold standard (average [] X usual intake)• Metabolic balance studies (ie protein, minerals)• Clinical Observation (eg: manufacturing errors B6, Cl)• Factorial approach• Population studies
Dietary Reference Intakes (DRI) (including RDA, UL, and AI) are the periodically revised
recommendations (or guidelines) of the National Academy of Sciences
Comparison of individual intake data to a reference or estimate of nutrient needs
• DRI: Dietary Reference Intakes– expands and replaces
RDA’s– reference values that
are quantitative estimates of nutrient intakes for planning and assessing diets for healthy people
• AI: Adequate Intake• UL: Tolerable Upper
Intake Level• EER: Estimated
Energy Requirement
DRI
• Estimated Average Requirement (EAR): expected to satisfy the needs of 50% of the people in that age group based on review of scientific literature.
• Recommended Dietary Allowance (RDA): Daily dietary intake level considered sufficient by the FNB to meet the requirement of nearly all (97-98%) healthy individuals. Calculated from EAR and is usually 20% higher
• Adequate intake (AI): where no RDA has been established.
• Tolerable upper limit (UL): Caution agains’t excess
DRI
• Nutrition Recommendations from the Institute of Medicine (IOM) of the U.S> National Academy of Sciences for general public and health professionals.
• Hx: WWII, to investigate issues that might “affect national defense”
• Population/institutional guidelines
• Application to individuals.
DRI’s for infants
• Macronutrients based on average intake of breast milk
• Protein less than earlier RDA• AAP Recommendations
– Vitamin D: 200 IU supplement for breastfed infants and infants taking <500 cc infant formula
– Iron: Iron fortified formula (4-12 mg/L), Breastfed Infants supplemented 1mg/kg/d by 4-6 months
Other Guidelines
• AAP
• Bright Futures
• Educational or Professional teaching
• Public Policy Guidelines
– Consider source– Consider Purpose– ? How apply to individual
Examples
• Baby cereal at 6 months
• Juice
• Introduction of Cows milk to infants
• Weight gain in pregnancy
• Family meals
Factors that alter Energy needs
• Body composition• Body size• Gender• Growth• Genetics
• Ethnicity• Environment• Adaptation and
accommodation• Activity/work• Illness/Medical
conditions
Energy
• Correlate individual intake with growth
Medical Information
Medical Information and History• Conditions that may impact growth,
nutritional status, feeding
• Medications that may impact nutrient needs, absorbtion, utilization, or tolerance
• Illness, treatments, proceedures
Medical Conditions
• Congenital Heart Disease• Cystic Fibrosis• Liver disorders• Short gut syndrome or other conditions of malabsorbtion• Respiratory disorders• Neuromuscular• Renal• Prematurity• Recent illness• Others
Drug-Nutrient Interaction
• Altered absorbtion
• Altered synthesis
• Altered appetite
• Altered excretion
• Nutrient antagonists
• Tolerance
Feeding and Developmental Information
Feeding and development
• Feeding Interactions• Feeding Relationship• Feeding Skills• Feeding Development• Feeding Behaviors
• What factors influence food choices, eating behaviors, and acceptance?
Feeding
• Delays in feeding skills
• Feeding intolerance
• Behavioral
• Medical/physiological limitations
• Other
Sociology of Food
• Hunger• Social Status• Social Norms• Religion/Tradition• Nutrition/Health
Psychosocial and environmental information
Psychosocial and Environmental Information
• Family– Constellation– Dynamics– Views– Resources– other
• Socioeconomic status– employment/education/income/other
• Beliefs– Religious/cultural/other
Clinical and Laboratory assessment
Clinical Assessment
• General appearance
• Temperature
• Color
• Respiratory/WOB
• Skin/hair/nails/membranes
• Output (urine and stool)
• Other
Clinical signs of Nutrient deficiency
Energy FTT, cacexia
Protein Slow growth, edema, impaired wound healing
Calcium Seizures, rickets, decreased bone density, tetany
Phosphorus Seizures, decreased bone density, rickets, bone pain, decreased cardiac fx
Vitamin D Decreased bone density, osteopenia, rickets
Vitamin A Dry scaly skin, FTT, xeropthalmia,, dry mucus membranes
Zinc FTT, edema, impaired wound healing, alopecia, acrodermatitis enteropathica
Iron Pallor, tachycardia, FTT
Essential fatty acid Scaly dermatitis, poor growth, alopecia
Vitamin C Swollen joints, impaired wound healing, swollen bleeding gums, loose teeth, petechia
fluid Weight loss, decreased UOP, dry mucus membranes, altered skin turgor, sunken fontanel, tachycardia, altered BP
Laboratory Assessmet• Laboratory tests can be
specific and may detect deficiencies or excess prior to
clinical symptomotology.• Useful for assess status,
response to tx, tolerance• Validity effected by handling,
lab method, technician accuracy, disease state, medical therapies
• Complements other components of process
Examples of Laboratory TestsIron Hct, HgB, ferritin*, ZPPH*
Protein/Energy Albumin, Transthyretin, RBP, other
Bone Ca, Ph, Alk Pho, Vit D
Vitamins
Minerals
Fluid Electrolytes, BUN, urine/serum osm, spec gravity
Linking Information
Assessment Process• Linking information
collected with: – Goals/expectations– Reference data/standards– Evidence– individual
• Asking questions
Case Examples
Yes No Not sure or don’t know
growth
diet
Medical, developmental, feeding
Social, environmental
clinical
laboratory
Interpretation: Asking Questions
Is there a problem?
Was there a problem?
Does information make sense?
What are goals and expectations?
What is etiology of the problem?
Intervention
• Identify etiology• Identify contributing
factors• Support feeding
relationship• Consider psychosocial
factors, family choice and input
• Weigh risk v.s. benefit
Weighing Risks and Benefits
Etiology: Contributing factors
Inadequate IntakeFluid, energy
MedicalBPD, reflux, frequent illness
Feeding relationshipStress, history
Psychosocial
Weighing Risks and Benefits
• Adequate intake vs feeding relationship
• Concentrating formula vs fluid status
• impact on tolerance, compliance, errors, cost
• solution to problem vs exacerbating problem
Summary:
Screening
Assessment
Diagnosis
Intervention
Monitoring and reevaluation
Summary
• Identify Problem or risk
• Identify Etiology• Determine
intervention• Monitor and
Reevaluate
Summary: Assessment Process
• Collect data• Interpret data
– Link information– Compare to references,
standards, expectations– Ask questions