Sleep apnea diagnosis, CPAP and BiPAP setup, and home oxygen therapy concepts tested on respiratory therapist certification exams.
29 cards · basic cards · AI-written, checked twice. Edit anything.
- What is obstructive sleep apnea (OSA)?
- Repeated collapse or narrowing of the upper airway during sleep that blocks airflow despite continued breathing effort
- What is central sleep apnea?
- Repeated pauses in breathing caused by the brain failing to send signals to breathe, with no airway obstruction
- How long must airflow stop to count as an apnea event on a sleep study?
- At least 10 seconds
- What is a hypopnea?
- A partial reduction in airflow during sleep, usually with a drop in oxygen saturation or an arousal
- What does the AHI (apnea-hypopnea index) measure?
- The number of apnea and hypopnea events per hour of sleep
- What AHI range defines mild sleep apnea?
- 5 to 15 events per hour
- What AHI range defines moderate sleep apnea?
- 15 to 30 events per hour
- What AHI level defines severe sleep apnea?
- Greater than 30 events per hour
- What is polysomnography (PSG)?
- An overnight, attended sleep study that records brain waves, eye movement, muscle activity, heart rhythm, airflow, and oxygen saturation
- What does the Epworth Sleepiness Scale measure?
- A patient's self-reported likelihood of falling asleep during routine daytime activities
- How does CPAP treat obstructive sleep apnea?
- It delivers continuous positive airway pressure that acts as a pneumatic splint, holding the upper airway open
- What is the primary indication for CPAP therapy?
- Obstructive sleep apnea
- What distinguishes BiPAP from CPAP?
- BiPAP delivers two separate pressure levels, a higher pressure during inhalation and a lower pressure during exhalation
- What does IPAP stand for on a BiPAP device?
- Inspiratory positive airway pressure
- What does EPAP stand for on a BiPAP device?
- Expiratory positive airway pressure