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During the calibration of a polarographic O2 analyzer, the respiratory therapist cannot get the sensor to read 100% when exposed to 100% oxygen, even after adjusting its calibration control.  What should the therapist recommend FIRST? 

Normal healthy people can exhale what percentage of the forced vital capacity in 1 sec? 

Define Expiratory Reserve Volume (ERV)

What term is used to describe a significant decrease in airflow during sleep but not a complete cessation of breathing? 

A new blood gas analyzer was calibrated by the manufacturer at sea level.  On receiving the analyzer at higher altitude, a respiratory therapist should:

Define Inspiratory Capacity (IC)

The respiratory therapist is responsible for cleaning a fiberoptic bronchoscope following a procedure where the bronchoscope was used to tamponade a bleed inside the pulmonary tree of a patient with confirmed active pulmonary tuberculosis.  Which of the following sterilization techniques is appropriate?  

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?