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NBRC Mock TMC Exam Review (Verified Answers)
- A patient is receiving O2 from an E cylinder at 4 L/min through a nasal
cannula. The cylinder pressure is 1900 psig. How long will the cylinder run until it is empty?
- 47 min
- 1.7 h
- 2.2 h
D. 3.6 h: E cylinder = 0.28
1900x0.28/4 = 133/60 = 2.21
Answer: C. 2 hours, 21 minutes
- After the Respiratory Therapist sets up a nonrebreathing mask on a patient
at a flow rate of 10 L/min, the reservoir bag collapses before the patient finishes inspiring. The RT should do which of the following?
- Change to a simple mask at a flow rate of 10 L/min
- Remove the one-way valve from the exhalation port.
- Place the patient on continuous positive airway pressure (CPAP) 1 / 3
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D. Increase the flow rate to 15 L/min: D. Increase the flow rate to 15 L/min
- A patient with carbon monoxide (CO) poisoning can best be treated with
which of the following therapies?
- Nasal Cannula at 6 L/min
- Simple O2 mask at 10 L/min
- CPAP and 60% O2
D. Nonrebreathing mask: D. Nonrebreathing mask
- The following blood gas levels have been obtained from a patient using a
60% aerosol mask.
pH: 7.47
PaCO2: 31 mmHg
PaO2: 58 mmHg
What should the RT recommend at this time?
- Place the patient on CPAP
- Increase the O2 to 70% 2 / 3
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- Intubate and place the patient on mechanical ventilation
D. Change to a nonrebreathing mask: A. Place the patient on CPAP
- 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
- 12 mL/dL
- 14 mL/dL
- 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
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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?