- An infant is being mechanically ventilated via a time-cycled, pressure-
limited ventilator. Which of the following would occur if PEEP were
increased without a corresponding increase in peak pressure?
• The tidal volume would decrease
- A physician requests the respiratory therapist to assess the upper airway
function of a patient with a fenestrated tracheostomy tube. The therapist
should:
• Remove the inner cannula, deflate the cuff, plug the outer cannula
- A patient receiving sustained maximal inspiratory (SMI) treatments with a
volume-oriented incentive spirometer device begins to inhale through the
device 18 times per minute. Which of the following best explains this
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, situation?
• The patient needs re-instruction regarding the SMI therapy
- After initiating mechanical ventilation in the A/C mode for an adult male
patient, the respiratory therapist observes that the patient is agitated and
having difficulty in cycling the ventilator. Which of the following should the
therapist do?
• Increase the sensitivity setting
- Data recorded for a 52 kg (110 lb) mechanically ventilated patient who has
a long standing history of chronic hypercapnia are as follows:
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, Ventilator Settings Arterial Blood Gases
Mode: SIMV
pH: 7.36
VT: 400 mL
PaCO2: 62 mmHg
Rate: 8/min
HCO3: 34 mEq/L
FiO2: 0.35
PaO2: 61 mmHg
On the basis of this information, the respiratory therapist should:
• Maintain current settings
- A respiratory therapist is manually ventilating a patient during a
cardiopulmonary resuscitation attempt. An arterial blood gas is drawn and
the results are as follows:
pH: 7.27
PaCO2: 38 mmHg
HCO3: 17 mEq/L
PaO2: 44 mmHg
Based on this information, the respiratory therapist should do which of the
following?
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, • Ensure that the manual resuscitator is connected to an oxygen source
- A COPD patient is brought to the ED after several days of increasing
respiratory distress. Baseline blood gases are drawn and the patient is
placed on oxygen at 2 LPM via nasal cannula. Data from the original and a
subsequent arterial blood sample are as follows:
Room Air Sample
pH: 7.23
PaCO2: 82 mmHg
HCO3: 33 mEq/L
PaO2: 49 mmHg
2L nasal O2
pH: 7.33
PaCO2: 66 mmHg
HCO3: 34 mEq/L
PaO2: 54 mmHg
Based on the above information, the respiratory therapist should:
• Increase the oxygen flow to 3L/min and continue to monitor.
- A 16-year-old female has just been admitted to the ED following a bicycling
accident. She is receiving supplemental oxygen via nonrebreathing mask.
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