NBRC Mock TMC Exam Review

NBRC Mock TMC Exam Review

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
• 3.6 h

E cylinder = 0.28 1900x0.28/4 = 133/60 = 2.21 (Ans-C

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)
• Increase the flow rate to 15 L/min

(Ans- D. Increase the flow rate to 15 L/min

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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
• Nonrebreathing mask (Ans- 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%
• Intubate and place the patient on mechanical ventilation
• Change to a nonrebreathing mask (Ans- 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 2 / 3

HCO3: 26 mEq/L

SaO2: 95%

Hb: 14 g/dL

• 12 mL/dL
• 14 mL/dL
• 16 mL/dL
• 18 mL/dL (Ans- (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?

• Simple O2 mask at 10 L/min
• Nasal cannula at 4 L/min
• NRB Mask at 15 L/min
• Air-entrainment mask at 40% O2 (Ans- 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:

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