QUESTION 1 Given the following values, which of the following are true for this
ID: 176060 • Letter: Q
Question
QUESTION 1
Given the following values, which of the following are true for this 60 kg female? VE = 6 lpm, FIO2 = 0.21, FEO2 = 0.16, FECO2 = 0.04. Identify each statement as correct or incorrect. Please note that A = incorrect and B = correct in these items.
VO2 = 300 cc/min
VO2 is approximately 1.4 mets
VCO2 is approximately 24 ml/min
This subject may have a mild fever
RER value = 0.8
- A. B.VO2 = 300 cc/min
- A. B.VO2 is approximately 1.4 mets
- A. B.VCO2 is approximately 24 ml/min
- A. B.This subject may have a mild fever
- A. B.RER value = 0.8
Explanation / Answer
1. B)Oxygen consumption VO2 = minute ventilation (FIO2 - FEO2)
= 6000 (0.21 - 0.16)
= 6000 (0.05) = 300 cc/min.
2. B) A MET is defined as oxygen uptake in ml/kg/min with one MET equal to the oxygen cost of sitting quietly, equivalent to 3.5 ml/kg/min.
1 MET = 3.5 ml/kg/min
0.3 l/min = divide L/min by the subject's body weight in kg, then multiply x 1000 =0.3/60 x 1000 = 5 ml/kg/min.
5/3.5 = 1.42 METS.
3. B VCO2 (mL/min) = VE x (FeCO2 – FiCO2) = 6000 (0.04-0.036) = 6000x 0.004 = 24 ml/min.
4. A
5.A The ratio between the amount of CO2 produced and O2 consumed in one breath (determined from comparing exhaled gasses to room air) is the respiratory exchange ratio (RER).
RER = VCO2/V02 = 24/300 = 0.08
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