What is Sleep Apnea? Causes, Symptoms, AHI Scores, and Modern CPAP Treatment

Sleep Apnea is one of the most common and serious sleep disorders, affecting an estimated 30 million adults in the United States. Despite its prevalence, millions remain undiagnosed, often rationalizing their severe daytime exhaustion, loud snoring, and morning headaches as simple stress or aging.

The term "apnea" comes from the Greek word apnoia, meaning "without breath." In the context of sleep, it is a medical disorder where breathing repeatedly stops and starts during sleep. Understanding which type of apnea you have and what your severity score means is the first step toward reclaiming your health and restful nights.

While all forms of sleep apnea involve a cessation of breath, the underlying causes are different:

1. Obstructive Sleep Apnea (OSA)

• The Cause: OSA is the most common type. It occurs when the muscles in the back of the throat relax excessively, causing the soft tissues (like the tongue and soft palate) to collapse and physically block the airway.

• The Result: This blockage prevents air from entering the lungs. The stoppage ends when your brain senses the lack of oxygen and briefly wakes you to reopen the airway—often with a loud gasp, snort, or choke—which you rarely remember.

2. Central Sleep Apnea (CSA)

• The Cause: Unlike OSA, which is a structural problem, CSA is a communication problem. It occurs when the brain fails to send the necessary signals to the muscles controlling breathing.

• The Result: There is no attempt to breathe for a period, though the airway remains open. CSA is often linked to underlying medical conditions like heart failure or certain neurological disorders.

3. Mixed or Complex Sleep Apnea

• The Cause: This is a combination of both OSA and CSA. In these cases, the patient may initially experience an obstructive event, which is then followed by a central event.

A proper diagnosis is achieved via a Sleep Study (Polysomnography or Home Sleep Test), which calculates the severity of your disorder using the Apnea-Hypopnea Index (AHI).

The AHI measures the total number of Apneas (complete stops in breathing) and Hypopneas (partial reductions in breathing) that occur per hour of sleep. This score determines the severity:

Untreated sleep apnea is a major risk factor for serious health conditions, including high blood pressure, diabetes, cardiovascular disease, and stroke. Fortunately, it is highly treatable.

Continuous Positive Airway Pressure (CPAP) is the gold standard, first-line treatment for OSA. A CPAP machine delivers pressurized air through a hose and mask, creating an air splint that physically holds the airway open, preventing collapse.

• APAP (Auto-CPAP): Modern machines often use APAP technology, which automatically adjusts the pressure level moment-to-moment based on your breathing needs, maximizing comfort and effectiveness.

• BiPAP (Bi-Level PAP): Used for more severe cases or CSA, BiPAP delivers a higher pressure when inhaling and a lower pressure when exhaling.

• Oral Appliance Therapy (OAT): For mild to moderate OSA, a custom-fitted mouth guard can reposition the jaw and tongue to keep the airway open.

• Lifestyle Changes: Weight loss, avoiding alcohol and sedatives before bed, and positional therapy (sleeping on your side) can reduce the frequency and severity of apneas.

• Surgery: In rare or severe cases linked to specific anatomical obstructions, surgical procedures may be considered.

If you suspect you have sleep apnea, seeking a diagnosis and adhering to therapy is the most important step you can take for your long-term health. To learn more about sleep apnea and CPAP therapy, our team is ready to help you! Contact the customer care team at The CPAP Shop by calling 866-414-9700.