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Which of the following is used to monitor the partial pressure of transcutaneous carbon dioxide? 

A 45-year-old male patient that weights 150 kg is undergoing polysomnography to determine appropriate CPAP levels.  The patient’s baseline AHI is 51.  At a CPAP level of 9 cm H2O, the AHI is now 7.  The respiratory therapist should recommend which of the following? 

While assessing a patient’s chest radiograph, the respiratory therapist observes an area of hyperlucency.  This may be the result of which of the following? 

A 56-year-old male with a recent diagnosis of OSA presents for CPAP titration.  CPAP of 5 cm H2O is initiated with a nasal mask.  Fifteen minutes after the patient falls asleep, a respiratory therapist observes the patient snoring, decreased inspiratory flow measurement, and an AHI of 15.  Which of the following should the therapist do NEXT?

The respiratory therapist is reviewing the results of a pulmonary function test.  The data shows FEV1/FEV% is 58%, SVC is 81% of predicted.  DL,CO is 62% of predicted.  Which of the following most likely represents the patient’s condition? 

While assessing a sleep study, the respiratory therapist notes a 40-second period where the respiratory rate was 20/min, and the oral and nasal thermistor tracings were flat.  Which of the following conditions was most likely present?

During the multiple-breath open-circuit nitrogen (N2) washout, N2 is washed out of the lungs while the patient breathes:

A normal AHI (apnea/hypopnea) is defined as less than

What is considered to be the major problem with the use of CPAP in patients with OSA?

Toward the end of a nitrogen washout test for functional residual capacity, the expired concentration of N2 begins rising. What does this probably indicate?