Herbie Murray
Sleep apnea is a sleep disorder that causes unusual breathing patterns, including pauses in breathing, shallow breathing, and collapse of the upper airway, resulting in poor ventilation and disrupted sleep. It affects people of all ages and is characterised by frequent episodes of stopped or slowed breathing during sleep, often accompanied by snoring or choking sounds upon resuming breathing. Sleep apnea can lead to excessive daytime sleepiness and is associated with severe health risks, including arrhythmias and heart-related issues. The condition is typically categorised into obstructive sleep apnea (OSA), central sleep apnea (CSA), and mixed/complex sleep apnea, a combination of both types. Treatment options include behavioural therapy, continuous positive airway pressure (CPAP) devices, and lifestyle changes, with surgery being a last resort.
| Characteristics | Values |
|---|---|
| Definition | A sleep-related breathing disorder characterised by pauses in breathing, shallow breathing, or collapse of the upper airway during sleep |
| Types | Obstructive sleep apnea (OSA), Central sleep apnea (CSA), Mixed/complex sleep apnea |
| Symptoms | Daytime sleepiness, snoring, non-restorative sleep, choking or snorting sounds upon resuming breathing, arrhythmias, "microsleeps" |
| Risk Factors | Age, male gender, obesity, large tonsils, hormonal changes, nasal or throat conditions, sleeping position, alcohol consumption, sedative use, smoking, nasal allergies |
| Diagnosis | Sleep study, home sleep apnea testing, audio/video recordings, apnea/hypopnea index (AHI), respiratory disturbance index (RDI) |
| Treatment | Behavioural therapy, continuous positive airway pressure (CPAP) devices, positional therapy (sleeping on sides), lifestyle changes, weight loss, surgery |
| Complications | Poor sleep quality, daytime fatigue, impaired concentration, behavioural issues, increased risk of serious conditions (e.g., high blood pressure, heart disease, stroke, diabetes) |
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What You'll Learn
Sleep apnea is a sleep-related breathing disorder
The condition can be categorised into three types: obstructive sleep apnea (OSA), central sleep apnea (CSA), and mixed/complex sleep apnea. OSA is the most common type, occurring when the upper airway becomes blocked many times while sleeping. This blockage can reduce or completely stop airflow. Risk factors for OSA include obesity, large tonsils, or changes in hormone levels, which can narrow the airway. CSA occurs when the brain fails to send the necessary signals to breathe, due to issues in the respiratory control centre of the central nervous system. This type often affects individuals with neuromuscular diseases, such as amyotrophic lateral sclerosis (ALS), or those who have experienced a stroke or have heart, kidney, or lung disease. Mixed/complex sleep apnea is a combination of both OSA and CSA.
Common symptoms of sleep apnea include excessive daytime sleepiness, non-restorative sleep, and snoring. Sleep apnea can lead to serious complications, including arrhythmias and excessive daytime sleepiness or "microsleeps," which can be dangerous when driving or operating machinery. The condition can also put stress on the heart and increase the risk of high blood pressure, heart disease, stroke, and diabetes.
Diagnosis of sleep apnea typically involves a sleep study, which can be performed at home or in a clinical setting. Treatment options vary depending on the severity and type of sleep apnea. Behavioural therapy, positional changes, and lifestyle modifications are often recommended as initial treatments. In more moderate to severe cases, continuous positive airway pressure (CPAP) devices or automatic positive airway pressure (APAP) devices may be suggested to help keep the airway open during sleep.
While there is no cure for sleep apnea, effective management strategies can help reduce symptoms and prevent potentially life-threatening complications.
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Obstructive sleep apnea (OSA)
The condition is characterised by repetitive pauses in breathing, periods of shallow breathing, or collapse of the upper airway during sleep, resulting in poor ventilation and sleep disruption. Each pause in breathing can last from a few seconds to a few minutes, and it often occurs numerous times a night. As breathing resumes, a choking or snorting sound may be heard.
OSA can affect anyone, but certain factors increase the risk of developing the condition. These include obesity, large tonsils, changes in hormone levels, age, gender (males are more likely to be diagnosed before the age of 50), and narrow airways. Excess body weight is considered a significant contributor to OSA, as fat tissues in the back of the throat can restrict the airway, especially during sleep.
The diagnosis of OSA is made when a patient experiences recurrent episodes of partial or complete collapse of the upper airway during sleep, resulting in apneas or hypopneas. The severity of OSA is determined using the Apnea-Hypopnea Index (AHI) or the Respiratory Disturbance Index (RDI). While AHI measures the average number of apneas and hypopneas per hour of sleep, RDI includes respiratory effort-related arousals (RERAs) in its calculation.
Treatment for OSA typically begins with behavioural therapy and lifestyle changes, such as weight loss, quitting smoking, and treating nasal allergies. Patients may also be advised to avoid alcohol, sleeping pills, and sedatives, as these substances can relax throat muscles and contribute to airway collapse. For positional OSA, which worsens when sleeping on the back, sleeping on the side is recommended. In more severe cases, continuous positive airway pressure (CPAP) devices may be used to splint the airway open during sleep. These machines deliver pressurised air through a plastic facial mask, effectively treating apneas and hypopneas.
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Central sleep apnea (CSA)
Sleep apnea is a sleep-related breathing disorder that affects a person's breathing while they sleep. It can cause unusual breathing patterns, such as fast breathing that gradually becomes shallower until the person stops breathing, and then starts breathing again. It can also cause a person to make choking or snorting sounds as their breathing resumes.
CSA is usually due to an instability in the body's feedback mechanisms that control respiration. It can also be caused by certain medications, such as opioids, or respiratory depressants. Additionally, patients with various medical conditions, such as atrial fibrillation, heart failure, ischemic stroke, spinal cord injury, renal failure, and chronic opioid use, are predisposed to acquiring CSA due to transient diminution of ventilatory output. The prevalence of CSA tends to increase with age and is higher in the elderly population above 65 years. It is also more common in men than in women.
The diagnosis of CSA is made through polysomnography, which reveals at least five central apneas and/or central hypopneas per hour of sleep, representing at least 50% of total respiratory events in the apnea-hypopnea index. Treatment for CSA often involves addressing the underlying cause, such as reducing the dosage or discontinuing the offending medication. In some cases, a pacemaker-like implantable device called the remedē System may be used to stimulate the nerve that controls breathing and help restore normal breathing patterns during sleep.
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Risk factors and causes
Sleep apnea is a sleep-related breathing disorder characterised by repetitive pauses in breathing, periods of shallow breathing, or the collapse of the upper airway during sleep, resulting in poor ventilation and sleep disruption. The risk factors and causes of sleep apnea are varied and can be influenced by both genetic and lifestyle factors.
Age is a significant risk factor; sleep apnea can occur at any age, but the risk increases as you get older. This is due to the normal changes in how the brain controls breathing during sleep and the buildup of fatty tissue in the neck and tongue, which can narrow the upper airway. Obesity or being overweight is another important cause, as it can lead to increased fat deposits in the neck and throat, restricting the airway. Premature birth is also a risk factor, as babies born before 37 weeks of pregnancy have a higher risk of developing breathing problems during sleep.
Lifestyle habits such as drinking alcohol and smoking can also increase the risk of sleep apnea. Alcohol can cause the muscles of the mouth and throat to relax, potentially blocking the upper airway. Smoking can cause inflammation in the upper airway, affecting breathing. Additionally, certain health conditions can raise the risk of sleep apnea, including heart failure, stroke, amyotrophic lateral sclerosis, and myasthenia gravis. Opioid use disorder or long-term use of prescribed opioid-based pain medications can also contribute to sleep apnea by affecting how the brain controls sleep.
The anatomy of an individual's neck and tongue can also play a role in the development of sleep apnea. People with large tonsils, necks, or tongues may have a narrower upper airway, making it more likely for the tongue to block the airway during sleep. Additionally, sleep apnea is more common in men than in women, and males are more likely to receive a diagnosis before the age of 50.
While these are some of the main risk factors and causes of sleep apnea, it is important to note that anyone can develop this condition, and individual factors may vary. Healthcare providers use tools such as the apnea/hypopnea index (AHI) or the Respiratory Disturbance Index (RDI) to determine the severity of a sleep apnea diagnosis.
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Diagnosis and treatment
Sleep apnea is a sleep-related breathing disorder characterised by pauses in breathing, shallow breathing, or the collapse of the upper airway during sleep, resulting in disrupted sleep and poor ventilation. It can be categorised as obstructive sleep apnea (OSA), central sleep apnea (CSA), or a combination of the two.
Diagnosis
A healthcare provider will diagnose sleep apnea by asking the patient about their symptoms and medical history. If sleep apnea is suspected, the provider may recommend testing to confirm the diagnosis. One way to help diagnose sleep apnea is through video and audio recordings of the patient sleeping, which can provide evidence of breathing patterns and air movement. The apnea/hypopnea index (AHI) or the Respiratory Disturbance Index (RDI) are used to determine the severity of a sleep apnea diagnosis. The AHI measures the average number of apnea (cessation of breathing) and hypopnea (reduced breathing) events per hour of sleep, while the RDI includes respiratory effort-related arousals (RERAs). The American Academy of Sleep Medicine (AASM) defines an apnea as a ≥ 90% reduction in airflow lasting at least 10 seconds, while a hypopnea is defined as a ≥ 30% reduction in airflow lasting at least 10 seconds, along with a decrease in pulse oxygenation or an arousal.
Treatment
Treatment for sleep apnea aims to manage symptoms and prevent complications, which can be severe or life-threatening. Treatment options vary depending on the type of sleep apnea and can include behavioural therapy, positional therapy (sleeping on the side), nasal surgery, and weight loss. In some cases, a continuous positive airway pressure (CPAP) or automatic positive airway pressure (APAP) device may be recommended. These machines deliver pressurised air to the patient through a facial mask, splinting the airway open during sleep. While CPAP therapy is effective in reducing apnea episodes, some patients find it uncomfortable and may experience side effects such as chest discomfort, skin irritation, and dry mouth or nose. Weight loss, particularly in overweight individuals, can also help reduce apnea frequencies and improve the apnea–hypopnea index (AHI). In children, orthodontic treatments such as nonsurgical rapid palatal expansion can help expand the nasal airway and decrease AHI.
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Frequently asked questions
Sleep apnea is a common sleep disorder where a person's breathing stops and restarts multiple times while they sleep.
There are two types of sleep apnea: obstructive sleep apnea (OSA) and central sleep apnea. OSA is the more common of the two and occurs when the upper airway becomes blocked during sleep. Central sleep apnea happens when the brain fails to send the right signals to the muscles to start breathing.
Symptoms of sleep apnea include loud snoring, daytime sleepiness, and tiredness. Sleep apnea can also cause more serious problems like high blood pressure, heart disease, and diabetes.
Sleep apnea is typically diagnosed through a sleep study, which can be done at home or in a sleep clinic. Treatment options include the use of breathing devices such as CPAP (continuous positive airway pressure) machines, lifestyle changes, and in some cases, surgery.
