MOD 3- Chapter 4 Assessing Nutrition and Anthropometric Measurements

Definition of Nutrition

• Nutrition is a state of balance between nutrient intake and physiological requirements for growth and health maintenance.

• Involves taking in and using food by which growth, repair, and maintenance of activities in the body as a whole or in any of its parts are accomplished.

Nutrigenomics

• Nutrigenomics researches how genes and diet affect a person’s health and risk of developing a disease.

Nutritional Intake

• Weight loss can be a health benefit or sign of illness.

• Look for signs of weight loss (e.g., loose- fitting clothes, reduced appetite)

  • Planned

  • Unplanned

• Malnutrition

• Overnutrition

• Undernutrition

Clinical Scenario: Intentional vs Unintentional Weight Loss

• Question: You are interviewing a 63-year-old male who says he will have to buy new clothes because they’re too big. He denies dieting or decreased appetite. This is an example of:

  • Intentional weight loss

  • Unintentional weight loss

  • Overnutrition

  • Malnutrition

• Answer: Unintentional weight loss

• Rationale: The patient is losing weight without trying; may indicate underlying disease or psychosocial/physical issues.

Diagnostics

• Complete blood count including:

  • Hemoglobin

  • Hematocrit

  • Mean Corpuscular Volume (MCV)

  • Mean Corpuscular Hemoglobin (MCH)

  • Platelet Count

• Vitamin B12 deficiency level

• Folate level

• Ferritin

• Prealbumin

• Serum albumin

Cultural Considerations

• Some religions or cultures may:

  • Abstain or are forbidden from certain foods/drinks

  • Restrict foods/drinks during holy days

  • Associate dietary/food preparation with rituals

• Nurses should know a patient’s cultural background and how it might affect nutritional decision making.

Health History

• Food preparation

• Current and past weight

• Weight changes

• Dietary preferences

• Food intolerances

• Food allergies

• Dietary supplements

• Water intake

• Appetite: Anorexia, Ageusia, Dysgeusia

• Difficulty swallowing: Dysphagia

Terminology Check: Anorexia vs Ageusia vs Dysgeusia vs Dysphagia

• Your patient reports a poor appetite for the past month. He states that “food has no taste anymore.” What term would you document?

  • Anorexia

  • Aphasia

  • Ageusia

  • Dysphagia

• Correct answer: Ageusia (absence of taste)

Clinician-Patient Communication Scenario

• Overweight patient says, “I do not have much of an appetite anymore.” Best response:

  • Do you make your own meals?

  • Well, it will help you to lose weight.

  • What foods do you like to eat?

  • When did you start to lose your appetite?

• Correct answer: When did you start to lose your appetite? (to determine onset and potential cause)

Nutritional Screening Tool

• Screens patients at nutritional risk in a short amount of time (Box 4-2).

• Tool assesses:

  • Patient diagnosis

  • Nutrition intake history

  • Symptoms of diarrhea, vomiting, reduced intake

  • Ideal body standards

  • Weight history

Assessing Nutrition (Overview)

• Assessment of a client’s nutritional status is based on:

  • Physical examination

  • Anthropometric measurements

  • Laboratory data

  • Food intake information

Technique 4-1: Inspecting General Appearance

• Purpose: Identify physical and psychological signs of malnutrition.

• Equipment: Paper tape measure, scale, stadiometer

• Inspect general appearance: Demeanor, Hair, Eyes, Lips, Tongue, Teeth, Gums, Skin, Nails, Mobility

• See Table 4-1 for normal and abnormal findings.

Technique 4-2: Assessing a Nutritional History

• Purpose: Identify baseline dietary patterns and factors influencing intake.

• Gather data on what they have eaten/drunk in the last 24 hours; document times and portion sizes.

• Review to identify overnutrition or undernutrition.

Diet Recall

• 24-hour or 3-day diet recall

• Person records all food/beverage intake.

• Best time to record is immediately after eating (per Box 4-2).

• This method may have recall bias.

Technique 4-2A: Assessing Nutrition Through Direct Observation

• Purpose: Identify the amount of food a patient eats at mealtime.

• Observe patient eating during mealtime; note any swallowing or feeding difficulties.

• Document the percentage of the meal eaten (0%–100%).

• Normal findings: Meal eaten 75%–100%

Anthropometric Measurements: Overview

• Techniques assess physical dimensions and subcutaneous fat to gauge nutritional status.

• Nurse compares measurements with normative standards.

• Key measurements: Height, Weight, BMI.

Technique 4-3: Assessing Body Mass Index (BMI)

• Purpose: Estimate the amount of body fat.

• Equipment: Scale, stadiometer, BMI chart

• BMI is a screening tool to identify body fat amount based on height and weight.

• Assess BMI:

  • Measure height with a stadiometer.

  • Weigh the patient.

  • Use BMI chart to find where height and weight intersect.

  • Record and interpret the BMI number.

BMI Findings

• Normal Findings:

  • BMI between $18.5$ and $24.9$

• Abnormal Findings:

  • Underweight: BMI $< 18.5$

  • Overweight: BMI $> 25$ to $29.9$ (often written as $25 \le \text{BMI} \le 29.9$)

  • Obese: BMI $\ge 30$ to $\le 39$ (i.e., $30 \le \text{BMI} \le 39$)

  • Morbidly Obese: BMI $\ge 40$

Technique 4-4: Assessing Abdominal Circumference

• Purpose: Measure abdominal fat

• Equipment: Tape measure (cm)

• Procedure: Place the tape around the bare abdomen at the level of the iliac crest; take measurement at the end of a normal exhalation.

Abdominal Circumference: Normal vs Abnormal

• Normal Findings: Males $< 102\,\text{cm}$ (40 inches); Females $< 88\,\text{cm}$ (35 inches)

• Abnormal Findings: Males $> 102\,\text{cm}$ (40 inches); Females $> 88\,\text{cm}$ (35 inches)

ClickerCheck (continued_3): BMI Question

• A patient is 6 feet 2 inches tall and weighs 200 lbs. What is his BMI?

  • 23

  • 24

  • 25

  • 26

• Correct answer: 26

• Note: The intersection of height and weight yields BMI 26, indicating overweight. Abdominal circumference is a screening tool but not diagnostic of body fatness or health on its own.

Technique 4-5: Assessing Waist-to-Hip Ratio (WHR)

• Purpose: Assess body size and fat distribution

• Equipment: Tape measure (in or cm)

• WHR is the ratio of waist circumference to hip circumference; assesses central fat distribution.

• Fat distribution:

  • Pear-shaped

  • Apple-shaped

WHR Procedure and Interpretation

• Steps:

  • Place the tape around the narrowest part of the waist between the hips and the 11th rib.

  • Measure after a normal breath.

  • Place tape at the widest part of the hips for the hip measurement.

  • Record both measurements in cm.

  • Calculate WHR = waist / hip.

• Normal Findings:

  • Men: WHR < 0.95

  • Women: WHR < 0.80

• Abnormal Findings:

  • Men: WHR >= 0.95

  • Women: WHR >= 0.80

• Note: Higher WHR indicates higher risk for cardiovascular disease and type 2 diabetes.

Technique 4-6: Assessing Mid-Upper Arm Circumference (MUAC)

• Purpose: Assess body protein and skeletal muscle mass; an alternative indicator when immobile or unable to use scale

• Equipment: Tape measure (cm), marker

• Measurement on nondominant arm without clothing; measure from top of shoulder to elbow; identify midpoint and mark; arm hangs by side; measure at midpoint with snug tape (not tight)

MUAC Normal vs Abnormal

• Normal Findings: Male > 23 cm; Female > 22 cm

• Abnormal Findings: Male < 23 cm; Female < 22 cm; Decreasing measurements over time indicate protein depletion

ClickerCheck (continued_4): WHR Measurement Timing

• Question: When taking WHR, after placing the tape around the narrowest waist, when do you take the measurement?

  • As the patient breathes in

  • As the patient breathes out

  • During any time of a normal breath

  • Breathing does not influence the measurement

• Correct answer: During any time of a normal breath (i.e., after a normal exhale)

Healthy People 2030 and Dietary Guidelines

• HP 2030 Goal: Improve health by promoting healthy eating and access to nutritious foods

• MyPlate provides a visual of the five food groups; Healthy Eating Plate is a guide for nutritious meals and portions

• Box 4-3 outlines four overarching guidelines for 2020–2025 (refer to Box 4-3 in the chapter for details)

Water Intake and Hydration Status

• Water is a major component of every tissue

• Signs of dehydration are outlined in Box 4-4

• Evaluate lab values: urine indicators, kidney function, CBC

• Daily weight is the single most important indicator of fluid status

Weight Loss Counseling and Strategies

• Weight loss takes time, effort, and patience

• Tips:

  • Read nutrition labels

  • Develop new habits

  • Reduce portion sizes

  • Decrease alcohol consumption

  • Exercise regularly

ClickerCheck (continued_5): Bedbound Patient Nutritional Assessment

• Scenario: A 90-year-old female patient is bedbound and immobile. What is the best method to assess body protein stores and skeletal muscle mass?

  • BMI

  • MUAC

  • Abdominal circumference

  • WHR

• Correct answer: MUAC

• Rationale: MUAC serves as an alternative indicator of nutritional status and reflects skeletal muscle protein stores (~50% of body protein is in muscle)

ClickerCheck (continued_6): Mealtime Assessment in Long-Term Care

• Scenario: RN in a long-term care facility with an 82-year-old patient losing weight. What should be assessed during mealtime?

  • Note if the patient has dysphagia

  • Observe the patient eating during mealtime

  • Calculate the percentage of intake

  • All of the above

• Correct answer: All of the above

• Rationale: Comprehensive mealtime assessment includes swallowing safety, observation of intake, and quantification of consumption

Practical and Ethical Implications

• Cultural sensitivity in nutrition: respect dietary restrictions and rituals while assessing intake

• Accurate documentation of weight changes and nutritional status is essential for diagnosis and care planning

• Use of multiple anthropometric measures improves assessment accuracy, especially in elderly or immobile patients

Connections to Foundational Principles and Real-World Relevance

• Nutrition assessment integrates biological (labs, BMI), anthropometric (height, weight, MUAC, WHR, abdominal circumference), and behavioral data (diet recall, preferences)

• Understanding signs and terminology (anorexia, ageusia, dysgeusia, dysphagia) aids in early identification of nutritional risk

• Hydration status and daily weight monitoring are critical in managing fluid balance in clinical populations