PSG Practice exam questions 2024/2025 with 100% correct answers
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Course
PSG Practice
Institution
PSG Practice
Which of the following are common side effects of CPAP? correct answersNasal congestion, Dry upper airway
During a CPAP titration, the patient suddenly wakes up, rips the mask off, and complains of difficulty exhaling and rapid heartbeat. The patient wishes to discontinue the study and go home. ...
Which of the following are common side effects of CPAP? correct answersNasal congestion, Dry upper
airway
During a CPAP titration, the patient suddenly wakes up, rips the mask off, and complains of difficulty
exhaling and rapid heartbeat. The patient wishes to discontinue the study and go home. Which of the
following should the technician do? correct answersDecrease the CPAP pressure, Comfort the patient
A patient returns to the sleep lab for a CPAP/BiPAP titration. The ABG shows a PCO2 of 60 mmHg, PaO2
of 80 mmHg, and a pH of 7.35. The baseline PSG showed an obstructive event index of 30 events/hr and
a central event index of 1.2 events/hr. At 8 cmH2O, obstrctive respiratory events are corrected. However,
at this pressure the patient begins to have central events associated with EEG arousals. What should the
technician do? correct answersRemain at 8 cmH2O until clear obstructive component emerges. Central
events are not uncommon when a higher pressure is first reached.
The physician orders CPAP to start at 4 cmH2O. The CPAP machine in the lab only has controls for EPAP
and IPAP. How should the technician set up the CPAP equipment prior to the study? correct answersThe
IPAP and EPAP controls are set to 4 cmH2O. When the levels are set the same it acts as CPAP.
Which of the following is required for the administration of O2 to a patient? correct answersFlow meter,
physican's order
A patient with severe asthma is referred to the sleep lab for an overnight PSG. Which of the following
would be particularly important to do when setting up this patient? correct answersUse paste (EC2
cream) instead of collodion on the scalp. The fumes can trigger and asthma attack in some patients.
Which of the following is not associated with the transition from stage Wake to stage 1 sleep? correct
answersAn increase in alpha activity. Alpha activity decreases with sleep onset.
An obese 60 year-old man is referred to the sleep lab for a baseline PSG after breathing pauses were
noted. He arrives for his study and states that he now uses O2 on a PRN basis. The physician's orders are
to begin the study with O2 at 12 L/min. What should the technician do? correct answersCall the
physician to verify the order at 12L/min.
, A patient has a baseline O2 saturation below the standard limits on the lab's protocol. The on-call
physician orders supplemental O2 starting at 2 L/min via nasal cannula. As the night progesses, the
patient's TCO2 levels increase by 12 mmHg and the respiratory rate decreases to 6 breaths/min. Which
of the following actions should the technician take? correct answersDecrease the O2 flow rate and
contact the physician. This is likely due to O2 induced hypoventilation. Contact the Dr. Decreasing the O2
may help to restore the patient's respiratory drive.
What should the technician do if the awake baseline O2 saturation is showing below 90%? correct
answersCheck the perfusion signal on the pulse oximeter.
Which of the following can decrease ventilation during sleep? correct answersReduction of upper airway
patency, instability of ventilatory control during REM sleep. This is true since sleeping relaxes the airway
and is very commonly seen during REM sleep.
What is the standard device used to verify CPAP pressure? correct answersAll pressure monitors are
calibrated to water column manometers as this is the only true measurement of cm H2O. This is
particularly true for CPAP.
What is not required for the use of CPAP at home? correct answersHumidification may increase comfort
but is not required.
After a CPAP titration, what would be important for the technician to report to the homecare company?
correct answersOptimal CPAP pressure, size and type of mask used, use of a humidifier during a study.
How can the initiation of CPAP decrease a patient's blood pressure? correct answersBy positive pressure,
which reduces the variability of cardiac output. It lowers the workload on the heart, reducing BP
During a CPAP/BiPAP titration, the CPAP pressure has reached 15 cmH2O, but obstructive apneasm
hypopneas and snoring continue. Two hours before his scheduled wake time, the patient wakes and tells
the technologist that the pressure is too high for him to breathe. The patient insists that the pressure be
decreased or he will discontinue the study and go home. What should the technician do? correct
answersSwitch to a BiPAP titration to see if the patient's comfort level increases.
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