Sleep apnea has three main types with different causes and treatments. Understanding the types of sleep apnea matters because treatments differ. Always work with a sleep specialist for diagnosis and management.
Obstructive sleep apnea (OSA)
Most common type (~84% of sleep apnea cases). Caused by physical airway collapse during sleep. The brain still signals breathing, but the airway is blocked.
Causes and risk factors:
- Obesity (most common contributor)
- Anatomic factors (small jaw, large tongue, enlarged tonsils)
- Aging
- Male sex (women catch up after menopause)
- Family history
- Alcohol, sedatives
Typical treatment: CPAP, weight loss, oral appliances, positional therapy, surgery in select cases.
Central sleep apnea
Less common (~5-10%). Brain fails to signal breathing — no airway collapse. Pauses in breathing without effort.
Causes:
- Heart failure
- Stroke
- Brainstem disease
- High altitude
- Opioid use
- Idiopathic
Treatment: ASV (adaptive servo-ventilation), oxygen, treating underlying cause.
Complex (mixed) sleep apnea
Combination of obstructive and central. Sometimes emerges during CPAP treatment of OSA — central events appear despite resolution of obstructive events.
Treatment: Often ASV or specialized PAP modes. Working with sleep specialist important.
Diagnosis
Sleep study (polysomnogram) distinguishes types:
- Apnea-hypopnea index (AHI) — events per hour
- Obstructive vs central events differentiated
- Oxygen desaturation
- Sleep stages
Severity classification
- Mild: AHI 5-14
- Moderate: AHI 15-29
- Severe: AHI 30+
Frequently Asked Questions
How do I know which type I have?
Sleep study determines this.
Is central sleep apnea more dangerous than obstructive?
Different concerns. Central often associated with serious underlying conditions.
What’s complex sleep apnea?
Combination of obstructive and central events.
Does treatment differ by type?
Yes. CPAP first-line for OSA; ASV more common for central/complex.
Can sleep apnea change types over time?
Yes, particularly emergence of central events on CPAP.
The bottom line on sleep apnea types
Three main types with different causes and treatments. Sleep study essential for diagnosis. Discuss with sleep specialist.