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Given the following data, what is the patient's total arterial O2 content?
pH: 7.41
PaCO2: 37 mmHg
PaO2: 88 mmHg
HCO3: 26 mEq/L
SaO2: 95%
Hb: 14 g/dL
A. 12 mL/dL
B. 14 mL/dL
C. 16 mL/dL
D. 18 mL/dL
(Hb x 1.36 x SaO2) + (0.003 x
PaO2) (14 x 1.36 x 0.95) + (0.003 x
88)
18.088 + 0.264
= 18.352
Answer: D. 18 mL/dL
,The respiratory therapist receives an order to set up a moderate level of O2 on
a patient who arrives in the ED breathing at a rate of 35 breaths/min. Which of
the following O2
delivery devices is most appropriate to use in this situation?
A. Simple O2 mask at 10 L/min
B. Nasal cannula at 4 L/min
C. NRB Mask at 15 L/min
D. Air-entrainment mask at 40% O2
D. Air-entrainment mask at 40% O2
A severe COPD patient arrives in the emergency department on a 2 L/min nasal
cannula. Arterial blood gas results follow:
pH: 7.32
PaCO2: 67 mmHg
PaO2: 62 mmHg
HCO3: 38 mEq/L
Which of the following is the most appropriate recommendation?
A. Increase the liter flow to 4 L/min
B. Maintain the current O2 level
C. Institute noninvasive positive pressure ventilation (NPPV)
D. Place on a NRB mask at 12 L/min
B. Maintain the current O2 level
, The physician has ordered O2 to be set up on a patient who has a spontaneous
tidal volume of 500 mL and an inspiratory time of 1 second. Which of the
following O2
delivery devices will deliver a flow that meets or exceeds this patient's inspiratory
flow?
A. 35% air-entrainment mask at 6 L/min
B. 60% aerosol mask at 12 L/min
C. NRB mask at 15 L/min
D. Simple O2 mask at 10 L/min
500 mL = 0.5 L
0.5/1 = 0.5 L/s (change L/s to ?/min by multiplying by 60
0.5 L x 60= 30 L/min
Select the device that delivers a flow of at least 30L/min
A. 35% air-entrainment mask at 6 L/min
A patient breathing 50% oxygen has a PaO2 of 248 torr. Which of the following
should the RT recommend?
A. Discontinue O2 therapy
B. Decrease the oxygen to 30%
C. Titrate oxygen to maintain an SpO2 > 93%
D. Repeat the blood gases because the PaO2 is not possible on this FiO2.
C. Titrate oxygen to maintain an SpO2 > 93%
Explanation: A PaO2 of 250 torr is normal on 50% O2. Remember, to determine the
normal PaO2 on any given O2%, multiply the O2% by 5. This is an approximation.
If titrate was not a choice, then you would discontinue the oxygen.
Complete Real Exam Questions And Correct Answers (Verified
Answers) Already Graded A+ | Guaranteed Success!! Newest
Exam || Just Released!!
Given the following data, what is the patient's total arterial O2 content?
pH: 7.41
PaCO2: 37 mmHg
PaO2: 88 mmHg
HCO3: 26 mEq/L
SaO2: 95%
Hb: 14 g/dL
A. 12 mL/dL
B. 14 mL/dL
C. 16 mL/dL
D. 18 mL/dL
(Hb x 1.36 x SaO2) + (0.003 x
PaO2) (14 x 1.36 x 0.95) + (0.003 x
88)
18.088 + 0.264
= 18.352
Answer: D. 18 mL/dL
,The respiratory therapist receives an order to set up a moderate level of O2 on
a patient who arrives in the ED breathing at a rate of 35 breaths/min. Which of
the following O2
delivery devices is most appropriate to use in this situation?
A. Simple O2 mask at 10 L/min
B. Nasal cannula at 4 L/min
C. NRB Mask at 15 L/min
D. Air-entrainment mask at 40% O2
D. Air-entrainment mask at 40% O2
A severe COPD patient arrives in the emergency department on a 2 L/min nasal
cannula. Arterial blood gas results follow:
pH: 7.32
PaCO2: 67 mmHg
PaO2: 62 mmHg
HCO3: 38 mEq/L
Which of the following is the most appropriate recommendation?
A. Increase the liter flow to 4 L/min
B. Maintain the current O2 level
C. Institute noninvasive positive pressure ventilation (NPPV)
D. Place on a NRB mask at 12 L/min
B. Maintain the current O2 level
, The physician has ordered O2 to be set up on a patient who has a spontaneous
tidal volume of 500 mL and an inspiratory time of 1 second. Which of the
following O2
delivery devices will deliver a flow that meets or exceeds this patient's inspiratory
flow?
A. 35% air-entrainment mask at 6 L/min
B. 60% aerosol mask at 12 L/min
C. NRB mask at 15 L/min
D. Simple O2 mask at 10 L/min
500 mL = 0.5 L
0.5/1 = 0.5 L/s (change L/s to ?/min by multiplying by 60
0.5 L x 60= 30 L/min
Select the device that delivers a flow of at least 30L/min
A. 35% air-entrainment mask at 6 L/min
A patient breathing 50% oxygen has a PaO2 of 248 torr. Which of the following
should the RT recommend?
A. Discontinue O2 therapy
B. Decrease the oxygen to 30%
C. Titrate oxygen to maintain an SpO2 > 93%
D. Repeat the blood gases because the PaO2 is not possible on this FiO2.
C. Titrate oxygen to maintain an SpO2 > 93%
Explanation: A PaO2 of 250 torr is normal on 50% O2. Remember, to determine the
normal PaO2 on any given O2%, multiply the O2% by 5. This is an approximation.
If titrate was not a choice, then you would discontinue the oxygen.
