MEDKIT 48?! Medical Library
Sleep Apnea
OSA • AHI • CPAP • Oxygen • Daytime Sleepiness. Learn sleep apnea vocabulary including OSA, AHI, CPAP, BiPAP, oxygen saturation, snoring, apneas, and sleep study terms.
Learning note: This medical library article is for learning and review only. It is not medical advice, diagnosis, or treatment. In a real emergency, call local emergency services.
Overview: OSA • AHI • CPAP • Oxygen • Daytime Sleepiness. Learn sleep apnea vocabulary including OSA, AHI, CPAP, BiPAP, oxygen saturation, snoring, apneas, and sleep study terms.
What this lesson teaches
Sleep apnea terms are common in primary care, pulmonology, cardiology, and nursing. Sleep apnea can affect daytime energy, concentration, blood pressure, heart rhythm, and oxygen levels.
This lesson teaches the vocabulary students need to understand sleep studies and treatment language.
- Explain obstructive sleep apnea in plain language.
- Understand AHI, apnea, hypopnea, CPAP, and BiPAP.
- Recognize oxygen desaturation and daytime sleepiness terms.
- Connect sleep apnea vocabulary to patient safety and chronic disease risk.
Core lesson
Obstructive sleep apnea, or OSA, happens when the upper airway repeatedly collapses or becomes blocked during sleep. The person may snore, gasp, stop breathing briefly, wake frequently, or feel tired during the day.
An apnea is a pause in breathing. A hypopnea is a partial reduction in breathing. AHI, or apnea-hypopnea index, is the number of apneas and hypopneas per hour of sleep. Higher AHI generally means more sleep-disordered breathing.
CPAP stands for continuous positive airway pressure. It delivers steady pressure to help keep the airway open. BiPAP uses two pressure levels: one for inhalation and one for exhalation.
Oxygen saturation may drop during apnea events. Repeated desaturation can stress the body. Sleep apnea is also linked with hypertension, cardiovascular strain, morning headaches, and daytime sleepiness.
Key terms to know
- Obstructive sleep apnea
- Repeated upper-airway blockage during sleep causing breathing pauses or reduced airflow.
- Apnea
- A temporary pause in breathing.
- Hypopnea
- A partial reduction in breathing during sleep.
- AHI
- Apnea-hypopnea index, the number of apnea and hypopnea events per hour of sleep.
- CPAP
- Continuous positive airway pressure, a device therapy that helps keep the airway open.
- BiPAP
- Bilevel positive airway pressure, using higher pressure for inhaling and lower pressure for exhaling.
- Oxygen desaturation
- A drop in blood oxygen saturation.
- Sleep study
- A test that measures sleep, breathing, oxygen, movement, and related signals.
- Daytime somnolence
- Excessive daytime sleepiness.
- Mask leak
- Air escaping from a PAP mask, which can reduce comfort or treatment effectiveness.
How to think through questions
- When a question mentions loud snoring, witnessed pauses, gasping, morning headaches, and daytime sleepiness, think OSA.
- AHI is a rate per hour, not a total lifetime score.
- PAP therapy success depends not just on prescription but also mask fit, comfort, cleaning, and adherence.
Common mistakes
- Thinking snoring always means sleep apnea. Snoring is a clue, not a diagnosis.
- Ignoring daytime sleepiness as a safety issue, especially with driving or machinery.
- Mixing up CPAP and BiPAP pressures.
- Thinking oxygen alone fixes airway obstruction. OSA is mainly an airway collapse problem.
Memory hooks
- OSA = obstructed airway during sleep.
- AHI counts events per hour.
- CPAP is one steady pressure; BiPAP has two pressure levels.
Mini quiz
- What does AHI stand for?
Show answer
Apnea-hypopnea index.
- What does CPAP do?
Show answer
It uses continuous pressure to help keep the airway open.
- What is an apnea?
Show answer
A temporary pause in breathing.
Quick review
Sleep Apnea Study Guide is designed to help students understand the language before they play the terms in MEDKIT 48 HOURS?! Review the key terms, then return to the game and test recall under pressure.
Study method: read the core lesson, say each key term out loud, answer the mini quiz, then play the matching game level.