Nutritional Assessment Vitamin Testing
[Pages:48]Nutritional Assessment ? Vitamin Testing
Elizabeth Frank, PhD, D(ABCC)
Medical Director Analytic Biochemistry, Calculi and Manual Chemistry, Mass Spectrometry ARUP Laboratories, Inc. Professor of Pathology University of Utah Department of Pathology
October 24, 2016
Brief Description
Vitamins are essential nutrients required for human health. In the body, vitamins function as enzymatic cofactors and antioxidants, and are active in metabolism and energy production. Vitamins are not synthesized endogenously and must be ingested regularly to maintain health and prevent deleterious consequences of deficiency. Laboratory testing is performed to assess nutritional status and to monitor therapeutic supplementation of vitamins.
2
Objectives
? Define nutrition and state the role of the clinical laboratory in nutritional assessment.
? Describe appropriate use and interpretation of laboratory testing for vitamins.
? Review requirements for collection, processing, and transport of specimens for nutritional assessment.
? Summarize analytical methods for vitamin assessment. ? Discuss vitamin B1 deficiency in an unexpected clinical setting.
3
Outline
? Overview of nutrition and nutritional assessment ? Use and interpretation of laboratory testing for
vitamins ? Requirements for specimen collection, processing,
and transport ? Analytical methods for vitamin measurement ? Clinical case study ? Vitamin deficiency
4
The Big Picture
? The utilization of nutrients to support and maintain health
NUTRITION
? Substances required for essential metabolic processes
NUTRIENTS
? Food intake, absorption, assimilation, biosynthesis, catabolism, excretion
5
Nutritional Assessment
History ? Dietary, medical, social
? Information on intake and requirements
Physical examination ? Anthropometric measurements
? Height, weight, triceps skinfold thickness, mid-arm muscle circumference
? Estimation of protein and fat stores, growth
? Body composition analysis Biochemical tests
? Laboratory evaluation of nutrients in body fluid specimens
6
Nutrient Categories
Macronutrients
Micronutrients
Intake >1 gram/day
Intake ................
................
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