Learn About Different Types of Sleep Apnea and Their Causes

Sleep apnea is a sleep related breathing disorder that causes repeated interruptions in breathing during sleep. There are several types, including obstructive, central, and complex sleep apnea. Understanding their causes, symptoms, and risk factors can help people recognize possible warning signs and seek appropriate medical evaluation when sleep related breathing problems occur.

Sleep apnea is a condition in which breathing repeatedly stops or becomes very shallow during sleep. These interruptions may occur several times throughout the night and can affect sleep quality and oxygen levels. Although the different forms of sleep apnea share some symptoms, their underlying causes can be different. Learning about the major types can help people better understand how sleep related breathing disorders develop and why proper evaluation may be important.

Different Types of Sleep Apnea

The three main types of sleep apnea are obstructive sleep apnea, central sleep apnea, and treatment emergent central sleep apnea. Each type involves disrupted breathing during sleep, but the mechanism behind the disruption varies.

Obstructive sleep apnea is the most common type. It occurs when the muscles and tissues in the upper airway relax during sleep and partially or completely block the flow of air. Central sleep apnea occurs when the brain temporarily fails to send the appropriate signals to the muscles responsible for breathing. Treatment emergent central sleep apnea can develop when central breathing pauses appear during treatment for obstructive sleep apnea.

Common characteristics associated with these conditions include:

• Obstructive sleep apnea: Usually involves physical blockage or narrowing of the upper airway during sleep.
• Central sleep apnea: Results from problems with the brain signals that control breathing.
• Treatment emergent central sleep apnea: May occur when central breathing interruptions develop after treatment for obstructive sleep apnea.
• Mixed patterns: Some individuals can experience features of both obstructive and central sleep apnea.

Causes and Risk Factors of Sleep Apnea

The causes of sleep apnea can vary depending on its type. Obstructive sleep apnea is often associated with physical characteristics that make the airway more likely to narrow during sleep. Central sleep apnea is more closely related to conditions or circumstances that affect the brain's breathing control system.

Factors that may contribute to sleep apnea include:

• Airway structure: A naturally narrow airway, enlarged tonsils, or certain anatomical features can increase the likelihood of obstruction.
• Body weight: Excess body weight can contribute to tissue around the airway and increase the risk of obstructive sleep apnea.
• Age: The risk of sleep apnea can increase with age, although it can affect people of different ages.
• Medical conditions: Certain heart, neurological, or respiratory conditions may be associated with central sleep apnea.
• Medications: Some medicines, particularly opioid medications, can affect breathing regulation during sleep.
• Family history: A family tendency toward sleep apnea or particular airway characteristics may increase risk.
• Sleep and lifestyle factors: Alcohol and certain substances can relax airway muscles and potentially worsen breathing interruptions.

Recognizing these differences is important because the appropriate evaluation depends on the type and possible underlying cause. A healthcare professional may consider symptoms, medical history, physical characteristics, and sleep study results when assessing sleep apnea.

Understanding the different forms of sleep apnea can make it easier to recognize persistent sleep related breathing problems. Loud snoring, witnessed pauses in breathing, nighttime gasping, morning headaches, and excessive daytime sleepiness can occur with sleep apnea, although symptoms vary between individuals. Anyone experiencing ongoing or concerning symptoms should discuss them with a qualified healthcare professional for appropriate assessment and guidance.