Nutrition in Health and Disease Flashcards

1
Q

What is Diet?

A

The sum total of all foods ingested with food being the individual items ingested

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2
Q

What are Nutrients?

A

Chemically defined compounds required by the body

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3
Q

What factors decide our food choice?

A
  • Likes
  • Dislikes
  • Religious and ethical considerations
  • Social and psychological components
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4
Q

What do we mean when we say the “Requirement” for a Nutrient

A

Requirement for a nutrient is that amount required to sustain life and prevent a deficiency

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5
Q

What two factors can you boil nutrition down to?

A

Intake and diet

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6
Q

What are the two components of Demand?

A

Fixed Component:

  • Basal requirements
  • -Membrane function (pumps, Transport and signalling)
  • -Mechanical Work (Cellular and tissue level)
  • -Substrate turnover

Variable Component:

  • Cost of processing the dietary intake
  • Cost of Physical activity
  • Cost of maintaining body temperature
  • Cost of growth
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7
Q

How do you measure the Basal Metabolic Rate?

A
  • Using the Schofield Equation
  • Depends on lean body mass
  • Various adjustment factors for activity and illness

Easy to overestimate requirements

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8
Q

What is nutritional failure?

A

Failure to meet the nutritional requirements of the individual
Development of deficiencies
Weight loss or obesity

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9
Q

What are the two presentations of large weight loss and what are their pathophysiology?

A

Marasma (person is very thin)

Inflammatory response causes leak of albumin into abdominal tissue.
Massive fluid movement.

This causes kwashiorkor

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10
Q

How do weight loss and obesity differ in the problems they cause?

A

Weight loss = the problem is now

Obesity = the problem will be in the future

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11
Q

What is the Malnutrition Universal Screening Tool?

A

Pick up patients at risk of malnutritions

Validated in the community and is hospital

Can be carried out by people without special training

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12
Q

What are the steps of the Malnutrition Universal Screening Tool?

A

Measure height and weight
Calculate BMI
-If >20 - Score 0
-If

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13
Q

How do you calculate BMI?

A

BMI = Weight (kg)/ Height^2 (m)

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14
Q

What are the results of the Malnutrition Universal Screening Tool?

A

A score over 2 suggests risk of undernutrition

Score 1: Supplements and watch

Score 0: Monitor

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15
Q

If a patient suffers from malnutrition what should you do?

A

Refer the patient to a state registered dietitian

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16
Q

What are some of the reasons people don’t eat?

A

Appetite Failure:

  • Anorexia nervosa
  • Disease related

Access Failure:

  • Teeth
  • Stroke
  • Cancer of head and neck
  • Head injury
Intestinal Failure (less common)
-Reduction in the functioning gut mass below the minimal amount necessary for adequate digestion and absorption of nutrients
17
Q

what are some of the treatments for malnutrition due to an Access Failure?

A

Sip Feeding
Fine Bore Nasogastric Tube
PEG

18
Q

What is PEG?

A

Percutaneous Endoscopic Gastrostomy

  • Patient is sedated
  • Endoscopy is carried out
  • Needle and guide wire passed into stomach
  • Tube passed down guide and out of the stomach
  • Can be placed radiologically too

Patient can be fed directly into stomach and can use at home