Nutrition and Vents Flashcards
If V02 is measured in a resting or non-stressed state, What is calculated?
Basal metabolic rate(BMR) or Basal energy expendature (BEE)
What is required for our body to metabolize food?
Oxygen, so combustion of the fuel/food can occur in our body
What is REE? how is it measured?
Resting energy expenditure. Patient is awake but at rest.
It is 10% higher than BEE
Measured when the patient is awake and at rest but not in basal conditions.
RQ can be calculated by what testing?
Indirect calorimetry
Why do COPD take in less calories?
Gastric ulcers, gastric discomfort
Chronic sputum prod may alter desire for food (they are swallowing it)
Full stomach = SOB, diaphragm is pressing down on stomach in hyperinflation
SOB = harder to make meals
What causes increased calorie expenditure in COPD patients?
infections increase metabolic rate
increased WOB can increase it
Caloric cost of breathing may increase 10 fold
In malnutrition, what in your body is wasted away and what is affected in the process?
You are not taking in as much protein and muscle is wasted away.
if muscle is wasted away diaphragm is lost as well and makes breathing harder
Protein deficiency also causes loss of immunoglobulins as well, decrease in immunity
What is indirect calorimetry?
Measures V02 and C02 with metabolic cart
Utilizes oxygen
Oxygen consumption is proportional to ATP synthesis (energy)
Use oxygen consumption to determine heat production
What does the metabolic cart measure and what does it calculate?
Both FiO2 and FeO2
FeCO2 (FiCO2)
Exhaled minute volume
Calculates VO2, VCO2, RQ and REE
What can cause error in testing indirect calorimetry?
Instability of FiO2 due to blender Delivery of FiO2 > .60 Bias flow on vents Water vapor causing sensor malfunction Improper Calibration
1 liter of 02 = how many Kcal burned?
1 Liter of O2 consumed by tissues = ~5 Kcals burned
what is the RQ for fat and Carbs?
Different foods have different RQ values
RQ of Carbohydrate = 1.0
RQ of Fat = ~.7
An RQ value of >1.0 from a metabolic indicates what?
> 1.0= overfeeding
Decrease total Kcal
An RQ value of .9-1.0 from a metabolic indicates what?
0.9-1.0 = Carbohydrate utilization
Decrease CHO in feeding
An RQ value of 0.8-0.9 from a metabolic indicates what?
- 8-0.9 = fat, protein and CHO utilization
- Normal
