CPSGT Positive Airway Pressure Therapy & Treatment Modalities 3

Question 1

What is the primary difference between standard BiPAP and BiPAP-ST (Spontaneous-Timed) mode?

Accepted Answer

BiPAP-ST includes a backup respiratory rate to ensure a minimum breathing frequency

Answer

BiPAP-ST adds a timed backup rate that delivers a breath if the patient does not initiate one within a set time interval, making it suitable for patients with central hypoventilation.

Question 2

During PAP titration, when the technologist observes persistent large mask leak, what is the most appropriate first response?

Accepted Answer

Refit or readjust the mask to achieve a proper seal

Answer

Mask leak reduces effective therapy pressure delivery and must be corrected by adjusting mask fit, tightening headgear, or selecting a different mask size or style before escalating pressure.

Question 3

What is the AASM-recommended residual AHI goal that defines a successful CPAP titration?

Accepted Answer

Less than 5 events per hour

Answer

Per AASM guidelines, an optimal titration result is a residual AHI of less than 5 events per hour with resolution of snoring and oxygen desaturations throughout all sleep stages and positions.

Question 4

Heated humidification added to PAP therapy primarily benefits patients by:

Accepted Answer

Decreasing nasal dryness and congestion to improve comfort and adherence

Answer

Heated humidification adds warmth and moisture to the airstream, reducing nasal dryness, irritation, and congestion — side effects that are among the most common reasons patients discontinue PAP therapy.

Question 5

Which condition may paradoxically emerge or worsen when a patient with OSA is treated with CPAP, resulting in new or persistent central apneas?

Accepted Answer

Complex (treatment-emergent) sleep apnea syndrome

Answer

Complex sleep apnea syndrome (also called treatment-emergent central sleep apnea) occurs when CPAP successfully eliminates obstructive events but unmasks or provokes central apneas that were not apparent during the diagnostic study.

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CPSGT Positive Airway Pressure Therapy & Treatment Modalities 3