Fall 2024 ABG Mock Board Review

A patient on mechanical ventilation has a PaO₂ of 45 mmHg and a PaCO₂ of 48 mmHg. Which of the following should the respiratory therapist prioritize?

• Increasing FiO₂ to improve oxygenation

• Reducing respiratory rate to decrease CO₂

• Increasing PEEP to improve oxygenation

• Decreasing tidal volume to decrease PaCO₂

A patient presents with a PaO₂ of 50 mmHg and a PaCO₂ of 40 mmHg on room air. Which of the following interventions should be prioritized?

• Initiate oxygen therapy

• Initiate IPPB therapy

• Initiate NIV therapy

• Initiate CPAP therapy

A patient’s arterial blood gas shows PaO₂ of 55 mmHg and PaCO₂ of 43 mmHg. Which ventilator adjustment should be made?

• Decrease respiratory rate

• Increase PEEP

• Increase tidal volume

• Increase inspiratory flow

A patient with COPD has a PaO₂ of 65 mmHg and a PaCO₂ of 52 mmHg while on 2 L/min nasal cannula. The respiratory therapist should:

• Increase the oxygen flow rate

• Initiate BiPAP therapy

A patient’s arterial blood gas reveals PaO₂ of 85 mmHg and PaCO₂ of 92 mmHg on 40% FiO₂. What action should the respiratory therapist take?

• Increase FiO₂

• Initiate mechanical ventilation

• Decrease FiO₂

• Monitor the patient closely without changes

A patient’s ABG shows PaO₂ of 48 mmHg and PaCO₂ of 45 mmHg. What is the priority intervention?

• Increase oxygen therapy

• Increase respiratory rate

• Decrease tidal volume

• Decrease PEEP

A patient with a PaO₂ of 55 mmHg on FiO₂ 0.40 and PaCO₂ of 40 mmHg is showing signs of distress. The next most appropriate action is to:

• Increase FiO₂

• Increase tidal volume

• Decrease respiratory rate

• Increase PEEP

PaCO₂ of 52 mmHg. The patient’s oxygen saturation is 89%. What adjustment should be made?

• Increase FiO₂ or EPAP

• Decrease IPAP

• Monitor the patient closely without changes

• Decrease FiO₂

A patient on 60% FiO₂ has a PaO₂ of 58 mmHg and PaCO₂ of 40 mmHg. Which ventilator adjustment should be made?

• Decrease FiO₂

• Increase PEEP

• Increase tidal volume

• Decrease PEEP

A patient on 4 L/min nasal cannula has an SpO₂ of 89%, PaO₂ of 55 mmHg, and PaCO₂ of 72 mmHg. Which of the following should be the next action?

• Increase oxygen flow rate

• Place patient on non-rebreather

• Coach patient to increase respiratory rate

• Initiate non-invasive ventilation