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Question 1Nutrition Assessment and Nutrient Requirements

Which laboratory marker is most commonly used to monitor short-term changes in visceral protein status in hospitalized patients receiving nutrition support?

  1. Serum albumin
  2. Hemoglobin
  3. Total lymphocyte count
  4. Prealbumin (transthyretin) Correct answer.

Explanation

Prealbumin (transthyretin) has a short half-life of roughly two days, so it responds more quickly to changes in protein status and inflammation than albumin. Albumin's long half-life of about 20 days makes it a poor short-term monitoring tool. Both are also negative acute-phase reactants, so trends must be interpreted alongside inflammatory status.

Question 2Nutrition Assessment and Nutrient Requirements

A 70 kg patient requires an enteral formula providing 1.2 g of protein per kilogram per day. How many grams of protein should be delivered daily?

  1. 96 g
  2. 84 g Correct answer.
  3. 58 g
  4. 70 g

Explanation

Multiply body weight by the protein prescription: 70 kg times 1.2 g/kg equals 84 g per day. This basic dose calculation underpins formula selection and volume determination. Rounding to the nearest whole gram is standard practice.

Question 3Nutrition Assessment and Nutrient Requirements

Which body compartment is the largest reservoir of body protein and the primary source of amino acids during catabolic stress?

  1. Plasma proteins
  2. Liver glycogen
  3. Adipose tissue
  4. Skeletal muscle Correct answer.

Explanation

Skeletal muscle holds the majority of the body's protein and serves as the main labile amino acid pool during stress. In catabolic states, muscle proteolysis supplies substrate for gluconeogenesis and acute-phase protein synthesis. Plasma proteins and adipose tissue contribute minimally to this amino acid supply.

Question 4Nutrition Assessment and Nutrient Requirements

Which method is considered the reference standard for measuring body composition by distinguishing fat, lean soft tissue, and bone mineral?

  1. Mid-upper arm circumference
  2. Dual-energy X-ray absorptiometry Correct answer.
  3. Bioelectrical impedance analysis
  4. Skinfold anthropometry

Explanation

Dual-energy X-ray absorptiometry separates fat mass, lean soft tissue, and bone mineral content, making it a reference method for body composition. Bioimpedance and anthropometry are indirect and influenced by hydration and technician technique. DXA is widely used in nutrition research and clinical assessment.

Question 5Nutrition Assessment and Nutrient Requirements

A patient's 24-hour urine urea nitrogen is 12 g, and 4 g of nitrogen is estimated from non-urea losses. Using the standard formula, what is the approximate total nitrogen loss?

  1. 16 g Correct answer.
  2. 12 g
  3. 20 g
  4. 28 g

Explanation

Total nitrogen loss equals urinary urea nitrogen plus the constant for non-urea losses: 12 g plus 4 g equals 16 g. This value is used to estimate nitrogen balance when dietary nitrogen intake is known. Nitrogen balance equals intake minus total output.

Question 6Nutrition Assessment and Nutrient Requirements

Which resting energy expenditure predictive equation is most appropriate for a healthy 30-year-old adult when indirect calorimetry is unavailable?

  1. Ireton-Jones equation
  2. Mifflin-St Jeor equation Correct answer.
  3. Harris-Benedict equation
  4. Penn State equation

Explanation

The Mifflin-St Jeor equation is generally recommended for healthy adults because it predicts resting energy expenditure more accurately than older equations. Harris-Benedict tends to overestimate in modern populations. Penn State and Ireton-Jones are designed for specific hospitalized or ventilated patients.

Question 7Nutrition Assessment and Nutrient Requirements

According to the respiratory quotient, a value of approximately 1.0 primarily indicates oxidation of which macronutrient?

  1. Protein
  2. Fat
  3. Alcohol
  4. Carbohydrate Correct answer.

Explanation

The respiratory quotient is the ratio of carbon dioxide produced to oxygen consumed. Pure carbohydrate oxidation yields an RQ near 1.0, fat near 0.7, and protein near 0.8. Values above 1.0 may suggest lipogenesis or overfeeding.

Question 8Nutrition Assessment and Nutrient Requirements

Which anthropometric measurement is most useful for estimating visceral fat and cardiometabolic risk in adults?

  1. Waist circumference Correct answer.
  2. Mid-arm muscle circumference
  3. Knee height
  4. Triceps skinfold

Explanation

Waist circumference reflects abdominal adiposity and correlates with visceral fat and cardiometabolic risk. Mid-arm muscle circumference and triceps skinfold assess peripheral muscle and fat stores. Knee height is used to estimate stature when standing height cannot be obtained.

Question 9Nutrition Assessment and Nutrient Requirements

A patient with chronic kidney disease not on dialysis is prescribed a protein intake of 0.8 g/kg/day and weighs 80 kg. What daily protein intake does this represent?

  1. 96 g
  2. 48 g
  3. 80 g
  4. 64 g Correct answer.

Explanation

Multiply 80 kg by 0.8 g/kg to obtain 64 g of protein per day. This conservative intake is used to limit nitrogenous waste while maintaining nutrition status in non-dialyzed chronic kidney disease. Dialysis patients typically require higher protein intakes.

Question 10Nutrition Assessment and Nutrient Requirements

Which finding best supports a diagnosis of malnutrition using the Global Leadership Initiative on Malnutrition criteria?

  1. Body mass index of 24 kg/m2
  2. Stable weight over 12 months
  3. Unintentional weight loss of 6% within the past 6 months Correct answer.
  4. Serum albumin of 3.8 g/dL

Explanation

GLIM requires at least one phenotypic and one etiologic criterion. Unintentional weight loss exceeding 5% within six months is a qualifying phenotypic criterion. A normal BMI, stable weight, and normal albumin do not meet phenotypic thresholds for malnutrition.

Question 11Nutrition Assessment and Nutrient Requirements

Which vitamin deficiency is most directly associated with prolonged fat malabsorption and steatorrhea?

  1. Folate
  2. Vitamin B12
  3. Vitamin C
  4. Vitamin A Correct answer.

Explanation

Vitamin A is a fat-soluble vitamin requiring micellar solubilization for absorption, so fat malabsorption impairs its uptake. Vitamins D, E, and K share this dependence. Water-soluble vitamins such as C, B12, and folate are absorbed by different mechanisms.

Question 12Nutrition Assessment and Nutrient Requirements

A patient's indirect calorimetry shows a respiratory quotient of 1.15. What is the most appropriate interpretation?

  1. Underfeeding with fat oxidation
  2. Normal mixed substrate oxidation
  3. Overfeeding with likely lipogenesis Correct answer.
  4. Measurement error from room air leak

Explanation

An RQ above 1.0 exceeds the range for pure carbohydrate oxidation and suggests net lipogenesis from overfeeding. The nutrition prescription should be reviewed and calories reduced. Values below 0.7 usually indicate technical error or underfeeding.

Question 13Nutrition Assessment and Nutrient Requirements

Which factor most strongly increases a patient's resting energy expenditure?

  1. Major burn injury Correct answer.
  2. Advancing age
  3. Mild obesity
  4. Mild anxiety

Explanation

Major burns produce among the largest hypermetabolic responses, substantially raising resting energy expenditure through catecholamine and inflammatory mediators. Mild anxiety has a small transient effect, obesity has a variable and modest effect, and aging generally lowers energy expenditure.

Question 14Nutrition Assessment and Nutrient Requirements

A 60 kg patient is prescribed 25 kcal/kg/day of enteral nutrition. What daily caloric provision does this represent?

  1. 1200 kcal
  2. 1800 kcal
  3. 2100 kcal
  4. 1500 kcal Correct answer.

Explanation

Multiply 60 kg by 25 kcal/kg to obtain 1500 kcal per day. This calculation sets the energy target used to determine formula volume and rate. Standard formulas typically provide about 1.0 kcal/mL.

Question 15Nutrition Assessment and Nutrient Requirements

Which laboratory value is most useful for assessing iron stores in a patient with inflammation?

  1. Serum ferritin Correct answer.
  2. Serum iron
  3. Mean corpuscular volume
  4. Total iron-binding capacity

Explanation

Ferritin reflects body iron stores, though it rises as an acute-phase reactant during inflammation. Serum iron and total iron-binding capacity are affected by diurnal variation and inflammation. Mean corpuscular volume changes only after prolonged deficiency.

Question 16Nutrition Assessment and Nutrient Requirements

Which statement best describes the purpose of a nutrition-focused physical examination?

  1. It replaces laboratory testing for all micronutrients.
  2. It identifies physical signs of nutrient deficiency and depletion. Correct answer.
  3. It determines the exact percentage of body fat.
  4. It measures resting energy expenditure directly.

Explanation

The nutrition-focused physical exam detects clinical signs of malnutrition and specific nutrient deficiencies, such as muscle wasting, edema, and skin changes. It complements rather than replaces laboratory and anthropometric data. It does not measure energy expenditure or quantify body fat.

Question 17Nutrition Assessment and Nutrient Requirements

Which fluid requirement estimate is commonly applied to stable adults receiving enteral nutrition?

  1. 30 mL/kg/day Correct answer.
  2. 100 mL/kg/day
  3. 10 mL/kg/day
  4. 60 mL/kg/day

Explanation

A common maintenance estimate is approximately 30 mL of fluid per kilogram per day, or roughly 1 mL per kcal delivered. This accounts for formula water plus additional flushes. Higher or lower needs apply in specific disease states.

Question 18Nutrition Assessment and Nutrient Requirements

A patient receiving parenteral nutrition develops refeeding syndrome. Which electrolyte abnormality is most characteristic?

  1. Hyperkalemia
  2. Hypophosphatemia Correct answer.
  3. Hypernatremia
  4. Hypercalcemia

Explanation

Refeeding syndrome is characterized by an intracellular shift of phosphate, potassium, and magnesium after reintroduction of carbohydrate. Hypophosphatemia is the hallmark and can cause weakness, arrhythmias, and respiratory failure. Electrolytes must be monitored and repleted during refeeding.

Question 19Nutrition Assessment and Nutrient Requirements

Which of the following best defines nitrogen balance?

  1. Total urinary urea nitrogen multiplied by six
  2. Nitrogen excretion divided by nitrogen intake
  3. Nitrogen intake plus fecal nitrogen loss
  4. Nitrogen intake minus total nitrogen excretion Correct answer.

Explanation

Nitrogen balance compares nitrogen consumed with nitrogen lost in urine, feces, and skin. A positive balance indicates net anabolism, while a negative balance indicates catabolism. The value is expressed in grams of nitrogen per day.

Question 20Nutrition Assessment and Nutrient Requirements

A 50 kg patient has a nitrogen intake of 16 g and total nitrogen output of 20 g. What is the nitrogen balance, and what does it indicate?

  1. +36 g, indicating positive balance
  2. -4 g, indicating catabolism Correct answer.
  3. +4 g, indicating anabolism
  4. -36 g, indicating severe catabolism

Explanation

Nitrogen balance equals intake minus output: 16 g minus 20 g equals negative 4 g. A negative value indicates net protein breakdown exceeding synthesis. Persistent negative balance warrants review of energy and protein adequacy.

Question 21Nutrition Assessment and Nutrient Requirements

Which dietary component provides the greatest thermic effect of food?

  1. Protein Correct answer.
  2. Carbohydrate
  3. Fat
  4. Water

Explanation

Protein has the highest thermic effect, expending roughly 20 to 30 percent of its energy content during digestion and metabolism. Carbohydrate and fat have lower thermic effects. Water provides no energy and no thermic effect.

Question 22Nutrition Assessment and Nutrient Requirements

Which patient characteristic most limits the accuracy of bioelectrical impedance analysis for body composition?

  1. Age over 40 years
  2. Regular physical activity
  3. Abnormal hydration status such as edema Correct answer.
  4. Stable body weight

Explanation

Bioimpedance relies on the conduction of an electrical current through body water, so fluid overload or dehydration distorts results. Stable weight, moderate age, and activity do not invalidate the measurement to the same degree. Standardized hydration and positioning improve accuracy.

Question 23Nutrition Assessment and Nutrient Requirements

Which biochemical marker is used to assess recent dietary intake of vitamin C?

  1. Serum ascorbic acid Correct answer.
  2. Serum retinol
  3. Serum folate
  4. Serum 25-hydroxyvitamin D

Explanation

Serum ascorbic acid reflects recent vitamin C intake and body pools, though it declines only after stores are depleted. Retinol, 25-hydroxyvitamin D, and folate assess different vitamins. Each nutrient requires its own specific biomarker.

Question 24Nutrition Assessment and Nutrient Requirements

Which condition most commonly increases protein requirements above standard maintenance levels?

  1. Controlled hypothyroidism
  2. Mild constipation
  3. Stable chronic kidney disease without dialysis
  4. Major thermal burns Correct answer.

Explanation

Major burns cause substantial protein catabolism and exudative losses, raising protein needs well above maintenance. Hypothyroidism, constipation, and stable non-dialyzed kidney disease do not increase protein requirements and may warrant restriction or no change. Protein prescriptions should match the catabolic state.

Question 25Nutrition Assessment and Nutrient Requirements

Which statement about the Harris-Benedict equation is most accurate?

  1. It estimates nitrogen balance from urine output.
  2. It directly measures oxygen consumption.
  3. It requires a steady-state indirect calorimetry measurement.
  4. It estimates basal energy expenditure from sex, age, weight, and height. Correct answer.

Explanation

The Harris-Benedict equation predicts basal energy expenditure using sex, age, weight, and height. It is a predictive formula, not a measurement technique. Indirect calorimetry measures oxygen consumption directly, and nitrogen balance is unrelated.

Question 26Nutrition Assessment and Nutrient Requirements

Which value defines adequate energy intake in a healthy, weight-stable adult as determined by indirect calorimetry?

  1. Measured resting energy expenditure multiplied by an activity factor Correct answer.
  2. Measured resting energy expenditure alone without adjustment
  3. Measured resting energy expenditure divided by the respiratory quotient
  4. Measured resting energy expenditure minus the thermic effect of food

Explanation

Indirect calorimetry yields resting energy expenditure, which represents the largest component of total daily energy expenditure but excludes physical activity and thermogenesis. To estimate total energy needs in a stable adult, the measured value is multiplied by an activity factor that reflects the patient's mobility and exercise level. Using the resting value alone systematically underestimates requirements in ambulatory patients.

Question 27Nutrition Assessment and Nutrient Requirements

Which laboratory measurement is the standard reference method for quantifying 24-hour total energy expenditure in free-living individuals?

  1. Doubly labeled water Correct answer.
  2. Serum prealbumin concentration
  3. 24-hour urinary urea nitrogen
  4. Resting pulse oximetry

Explanation

Doubly labeled water tracks the differential elimination of deuterium and oxygen-18 to compute carbon dioxide production over days, giving an accurate integrated measure of total energy expenditure under free-living conditions. It is considered the reference standard for this purpose. The other listed tests assess nutritional status markers or protein catabolism, not energy expenditure.

Question 28Nutrition Assessment and Nutrient Requirements

A hospitalized adult has a body mass index of 17.5 kg/m2, unintentional weight loss of 8% over three months, and no edema. Using the Global Leadership Initiative on Malnutrition framework, how should this presentation be classified?

  1. Malnutrition excluded because no acute inflammatory condition is documented
  2. Malnutrition diagnosed, with severity graded by the degree of weight loss and low body mass index Correct answer.
  3. Malnutrition diagnosed only after serum albumin falls below the reference range
  4. Malnutrition excluded because body mass index remains above 17.0 kg/m2

Explanation

The framework requires at least one phenotypic criterion, such as non-volitional weight loss, low body mass index, or reduced muscle mass, plus at least one etiologic criterion such as reduced intake, inflammation, or disease burden. Severity is then graded as moderate or severe using cut points for the phenotypic criteria. This patient meets phenotypic thresholds, so malnutrition is diagnosed and staged.

Question 29Nutrition Assessment and Nutrient Requirements

Which parameter is directly measured when indirect calorimetry is used to calculate energy expenditure?

  1. Heat lost through the skin surface
  2. Substrate concentration in adipose tissue
  3. Total body water by isotope dilution
  4. Rates of oxygen consumption and carbon dioxide production Correct answer.

Explanation

Indirect calorimetry does not measure heat directly; it measures inspired and expired gas concentrations and ventilation to derive oxygen consumption and carbon dioxide production. Those values are entered into the Weir equation to compute energy expenditure. Direct calorimetry, by contrast, measures heat loss from the body.

Question 30Nutrition Assessment and Nutrient Requirements

A patient's measured respiratory quotient is 0.82. Which interpretation is most appropriate?

  1. Net lipogenesis from excess carbohydrate intake
  2. Predominant fat oxidation with minimal carbohydrate use
  3. A mixed substrate oxidation pattern with fat and carbohydrate contributions Correct answer.
  4. Nonphysiologic values indicating a measurement error

Explanation

A respiratory quotient of about 0.82 falls between the pure fat value near 0.70 and the pure carbohydrate value near 1.00, indicating simultaneous oxidation of both fuels. Typical mixed-diet values in healthy adults cluster around 0.80 to 0.85. Values above 1.0 suggest net lipogenesis, and values below 0.70 are generally nonphysiologic.

Question 31Nutrition Assessment and Nutrient Requirements

Which measurement is the most practical bedside indicator of skeletal muscle mass in an adult?

  1. Mid-upper arm muscle circumference Correct answer.
  2. Triceps skinfold thickness
  3. Waist-to-hip ratio
  4. Body mass index

Explanation

Mid-upper arm muscle circumference is derived from arm circumference and triceps skinfold thickness and estimates the protein-rich skeletal muscle compartment. It is inexpensive, noninvasive, and repeatable at the bedside. Waist-to-hip ratio and body mass index reflect fat distribution and overall size rather than lean tissue.

Question 32Nutrition Assessment and Nutrient Requirements

A 70 kg adult requires 1.5 g/kg/day of protein. How many grams of protein should be provided daily?

  1. 70 g
  2. 150 g
  3. 105 g Correct answer.
  4. 35 g

Explanation

Multiply the prescribed protein dose by body weight: 1.5 g/kg/day times 70 kg equals 105 g/day. This calculation is a routine step when translating a protein prescription into a formula volume or supplement plan. Checking the arithmetic against the units prevents dosing errors.

Question 33Nutrition Assessment and Nutrient Requirements

Which laboratory test is most appropriate for monitoring short-term adherence to a prescribed low-sodium diet?

  1. Serum sodium concentration
  2. Random spot urinary potassium
  3. 24-hour urinary sodium excretion Correct answer.
  4. Serum potassium concentration

Explanation

A 24-hour urine collection captures sodium excreted over the day and correlates closely with intake in a steady state, making it the preferred objective measure of dietary sodium adherence. Serum sodium is tightly regulated and remains normal despite wide swings in intake. Potassium measurements reflect different dietary and renal factors.

Question 34Nutrition Assessment and Nutrient Requirements

Which trace element status is best assessed by measuring serum ferritin in a patient without inflammation?

  1. Selenium status
  2. Zinc status
  3. Iron stores Correct answer.
  4. Copper status

Explanation

Ferritin is the principal iron storage protein, and serum ferritin correlates with body iron stores when inflammation is absent. Because ferritin is an acute-phase reactant, concurrent inflammation can raise values independently of iron status. Zinc, copper, and selenium are assessed with their own specific markers.

Question 35Nutrition Assessment and Nutrient Requirements

Which biochemical marker best reflects long-term glycemic control over the preceding two to three months?

  1. Glycated hemoglobin Correct answer.
  2. Random capillary glucose
  3. Fasting plasma glucose
  4. Serum fructosamine

Explanation

Glycated hemoglobin integrates glucose exposure over the lifespan of circulating red blood cells, roughly two to three months, so it reflects chronic glycemic control. Fasting and random glucose values capture only a single moment. Fructosamine reflects a shorter period of about two to three weeks.

Question 36Nutrition Assessment and Nutrient Requirements

A patient with ascites and generalized edema is being assessed for malnutrition. Which limitation most affects the interpretation of body weight and body mass index?

  1. Indirect calorimetry becomes invalid in the presence of ascites
  2. Body mass index overestimates height in these patients
  3. Fluid accumulation inflates weight and masks loss of lean tissue Correct answer.
  4. Skinfold calipers cannot be used in edematous patients

Explanation

Ascites and edema add fluid weight that is not lean or fat tissue, so measured weight and derived body mass index overstate nutritional status and can conceal true muscle wasting. Clinicians should interpret weight trends cautiously and use alternative measures such as dry weight, mid-arm muscle circumference, or handgrip strength.

Question 37Nutrition Assessment and Nutrient Requirements

Which statement best describes the concept of biological value when evaluating dietary protein quality?

  1. The ratio of essential to nonessential amino acids in a food
  2. The speed at which a protein is digested after ingestion
  3. The total nitrogen content of a food per gram of protein
  4. The proportion of absorbed nitrogen retained by the body for growth and maintenance Correct answer.

Explanation

Biological value expresses how efficiently absorbed nitrogen from a protein source is retained in body tissues, with higher values indicating better matching of amino acid supply to requirement. It accounts for both absorption and subsequent retention. Nitrogen content and digestion speed describe different properties.

Question 38Nutrition Assessment and Nutrient Requirements

A 55 kg patient receiving enteral nutrition has a nitrogen intake of 12 g and measured total nitrogen output of 9 g over 24 hours. What is the nitrogen balance and its interpretation?

  1. Negative 3 g, suggesting catabolism
  2. Positive 3 g, suggesting anabolic balance or adequate intake Correct answer.
  3. Negative 21 g, suggesting severe depletion
  4. Positive 21 g, suggesting excessive protein intake

Explanation

Nitrogen balance equals nitrogen intake minus total nitrogen output, so 12 g minus 9 g gives positive 3 g. A positive balance indicates that retained nitrogen exceeds losses, consistent with anabolism, growth, or convalescence. Interpretation should also consider whether intake and collection were complete.

Question 39Nutrition Assessment and Nutrient Requirements

Which situation most reliably raises protein requirements above standard maintenance in a critically ill adult?

  1. Stable chronic hypertension
  2. Compensated hypothyroidism
  3. Mild constipation during enteral feeding
  4. Major burn injury with large exudative and catabolic losses Correct answer.

Explanation

Major burns cause extensive protein loss through wound exudate and a pronounced catabolic stress response, so protein needs rise well above maintenance. Critical illness with systemic inflammation similarly increases requirements. Conditions such as hypertension or hypothyroidism do not substantially alter protein needs.

Question 40Nutrition Assessment and Nutrient Requirements

Which statement about the Mifflin-St Jeor equation is most accurate?

  1. It estimates total energy expenditure without any activity factor
  2. It requires measured oxygen consumption and carbon dioxide production
  3. It is validated only in patients receiving mechanical ventilation
  4. It estimates resting energy expenditure from weight, height, age, and sex and is often preferred for nonobese adults Correct answer.

Explanation

The Mifflin-St Jeor equation uses weight, height, age, and sex to predict resting energy expenditure and is widely recommended for nonobese adults because of its accuracy relative to older equations. It predicts resting rather than total expenditure and does not use gas-exchange data. Predictive equations remain estimates and should be adjusted to clinical response.

Question 41Indications, Contraindications, and Access for Nutrition Support

Which patient is the most appropriate candidate for enteral nutrition rather than parenteral nutrition?

  1. A patient with high-output enterocutaneous fistula and hemodynamic instability
  2. A patient with an acute small bowel obstruction
  3. A patient with a functioning gastrointestinal tract who cannot eat enough orally Correct answer.
  4. A patient with ischemic bowel and peritonitis

Explanation

Enteral nutrition is preferred whenever the gastrointestinal tract is functional and can be safely accessed, because it maintains gut mucosal integrity, is cheaper, and carries fewer infectious complications than parenteral nutrition. It is indicated when oral intake is inadequate but the gut still works.

Question 42Indications, Contraindications, and Access for Nutrition Support

A patient is expected to eat nothing by mouth for at least 7 to 10 days and is well nourished on admission. What is the most appropriate nutrition support decision?

  1. Begin enteral or parenteral nutrition if prolonged inadequate intake is anticipated Correct answer.
  2. Start parenteral nutrition on day one of admission
  3. Provide only intravenous fluids until two weeks have passed
  4. Withhold all nutrition support until the patient loses weight

Explanation

In a well-nourished patient, short periods of inadequate intake are usually tolerated, but when the expected period of minimal intake approaches 7 to 10 days, nutrition support should be initiated. Anticipating the duration of inadequate intake guides the decision.

Question 43Indications, Contraindications, and Access for Nutrition Support

Which laboratory or clinical finding most strongly supports initiating nutrition support in a hospitalized patient?

  1. Mild nausea on the day of admission
  2. Unintentional weight loss of more than 10 percent over 6 months Correct answer.
  3. A normal body mass index
  4. A single low serum albumin level

Explanation

Significant unintentional weight loss, especially greater than 10 percent over 6 months, reflects meaningful depletion of body stores and supports nutrition support. Serum albumin is an acute-phase reactant and is not a reliable stand-alone marker of nutritional status.

Question 44Indications, Contraindications, and Access for Nutrition Support

Which access route is generally preferred for short-term (under 4 weeks) enteral nutrition in a patient with a functioning gut?

  1. Nasogastric or nasoenteric tube Correct answer.
  2. Surgically placed jejunostomy
  3. Percutaneous endoscopic gastrostomy
  4. Tunneled central venous catheter

Explanation

For short-term enteral feeding, a nasogastric or nasoenteric tube is usually preferred because it avoids a procedure and can be placed at the bedside. Gastrostomy and jejunostomy are considered when feeding is expected to continue beyond roughly 4 weeks.

Question 45Indications, Contraindications, and Access for Nutrition Support

Which patient should not receive enteral nutrition through the gastrointestinal tract?

  1. A patient with chronic kidney disease receiving a renal formula
  2. A patient with a mechanical bowel obstruction and active vomiting Correct answer.
  3. A patient with mild acute pancreatitis tolerating a soft diet
  4. A patient with a stroke and dysphagia who has a nasogastric tube

Explanation

Mechanical obstruction with active vomiting prevents safe delivery and absorption of enteral formula and risks aspiration. Enteral feeding requires a patent, functional lumen and adequate gastric emptying.

Question 46Indications, Contraindications, and Access for Nutrition Support

Which of the following is a recognized indication for parenteral nutrition?

  1. A patient with uncomplicated mild gastroenteritis
  2. A patient who can eat but prefers not to
  3. A patient with obesity who wants to lose weight
  4. A patient with short bowel syndrome unable to absorb adequate enteral nutrition Correct answer.

Explanation

Parenteral nutrition is indicated when the gastrointestinal tract cannot deliver or absorb sufficient nutrients, as in short bowel syndrome with inadequate absorptive capacity. Preference, mild self-limited illness, and weight-loss goals are not indications.

Question 47Indications, Contraindications, and Access for Nutrition Support

When placing a central venous catheter for parenteral nutrition, which site is associated with the lowest risk of catheter-related bloodstream infection in many settings?

  1. Peripheral antecubital vein
  2. Internal jugular vein in an emergency
  3. Femoral vein
  4. Subclavian vein Correct answer.

Explanation

Subclavian access is generally associated with lower infection risk than femoral or internal jugular access, though pneumothorax risk and patient factors must be weighed. Site selection balances infection risk against mechanical complications and anatomy.

Question 48Indications, Contraindications, and Access for Nutrition Support

Which statement best describes the rationale for preferring enteral over parenteral nutrition when both are feasible?

  1. Enteral nutrition preserves gut mucosal integrity and reduces infectious complications Correct answer.
  2. Enteral nutrition always provides more calories per liter
  3. Enteral nutrition eliminates the need for monitoring
  4. Enteral nutrition avoids any risk of aspiration

Explanation

Enteral feeding supports intestinal mucosal health, maintains gut-associated immune function, and is associated with fewer infectious complications and lower cost than parenteral nutrition. These benefits underlie the rule to use the gut when it works.

Question 49Indications, Contraindications, and Access for Nutrition Support

A patient with severe acute pancreatitis and persistent intolerance of enteral feeding after several days requires nutrition support. What is the most appropriate next step?

  1. Consider supplemental or total parenteral nutrition while continuing attempts at enteral feeding as tolerated Correct answer.
  2. Withhold all nutrition support until oral intake resumes
  3. Switch to clear liquids only
  4. Continue enteral feeding at a higher rate despite intolerance

Explanation

When enteral nutrition cannot meet needs in severe acute pancreatitis, supplemental or total parenteral nutrition is appropriate while enteral feeding is advanced as tolerated. Meeting energy and protein needs matters because prolonged deficit worsens outcomes.

Question 50Indications, Contraindications, and Access for Nutrition Support

A patient requires enteral feeding and is at high risk for aspiration because of gastric paresis. Which access and delivery strategy is most appropriate?

  1. Post-pyloric feeding with the head of bed elevated Correct answer.
  2. Bolus gastric feeds of large volume
  3. Withhold all enteral nutrition indefinitely
  4. Gastric feeding with the head of bed flat

Explanation

Post-pyloric delivery reduces aspiration risk when gastric emptying is impaired, and elevating the head of the bed further lowers risk. These measures allow enteral nutrition to continue safely in high-risk patients.