Obstructive Sleep Apnea
Obstructive sleep apnea is a condition in which the walls of the throat relax and narrow during sleep, briefly blocking breathing. These repeated pauses interrupt sleep and lower oxygen levels, often causing loud snoring and daytime tiredness. It is common, frequently undiagnosed, and usually treatable once recognised.
Overview
What is obstructive sleep apnea?
Obstructive sleep apnea is a sleep disorder in which the muscles and soft tissues at the back of the throat relax during sleep and temporarily block the airway. Breathing stops and starts repeatedly through the night, often without the person fully waking. These interruptions disturb sleep quality and can briefly lower oxygen levels, leading to daytime tiredness and other effects.
How common is obstructive sleep apnea / who does it affect?
Obstructive sleep apnea is a common condition, though many people who have it are unaware and remain undiagnosed. It can affect anyone, including children, but is more frequent in adults, particularly those who are overweight, and tends to become more common with age. Symptoms are often first noticed by a partner who hears loud snoring or pauses in breathing.
Symptoms and Causes
What are the symptoms of obstructive sleep apnea?
During sleep, common signs include loud snoring, gasping, snorting or choking sounds, and breathing that repeatedly stops and starts, often noticed by a partner. During the day, people may feel very sleepy, find it hard to concentrate, wake with a headache or dry mouth, or feel irritable. Poor sleep quality can affect mood, alertness and daily functioning.
What causes obstructive sleep apnea and who is at risk?
It is caused by the airway narrowing or closing as throat tissues relax during sleep. Several factors raise the risk, including carrying excess weight, having a larger neck circumference, being older, and the natural shape of the airway, jaw or tonsils. Drinking alcohol, smoking and taking certain sedatives can also make the airway more likely to collapse during sleep.
Diagnosis and Tests
How is obstructive sleep apnea diagnosed?
Diagnosis starts with a discussion of sleep patterns, snoring, daytime sleepiness and any observations from a partner. A sleep study is the main test, recording breathing, oxygen levels, heart rate and other measures during sleep, either at home with a portable device or in a sleep centre. The results show whether breathing pauses occur and how often, indicating severity.
Management and Treatment
How is obstructive sleep apnea treated or managed?
Treatment depends on severity and individual needs. Lifestyle measures such as reaching a healthy weight, reducing alcohol, stopping smoking and sleeping on your side can help. A common and effective treatment is a continuous positive airway pressure (CPAP) device, which keeps the airway open during sleep. Custom mouthpieces and, in some cases, surgery may be considered. Treatment is tailored individually.
Prevention
Can obstructive sleep apnea be prevented or its risk reduced?
While not all cases can be prevented, the risk can often be reduced. Maintaining a healthy weight is one of the most helpful steps, as excess weight around the neck is a key risk factor. Limiting alcohol, especially before bed, stopping smoking, and avoiding sedatives unless advised by a doctor can also lower the chance of the airway collapsing during sleep.
Additional Common Questions
Does everyone who snores have sleep apnea?
No. Snoring is common and does not always mean sleep apnea. However, loud snoring combined with pauses in breathing, gasping or significant daytime sleepiness can be a sign and is worth discussing with a doctor, who may suggest a sleep study.
Can obstructive sleep apnea affect my general health?
Poorly controlled sleep apnea can affect daytime alertness and overall wellbeing, and over time may be linked to other health concerns. This is one reason it is helpful to have suspected sleep apnea assessed and treated rather than left unmanaged.
Will I need to use a CPAP machine forever?
It depends on the cause and how you respond to treatment. For many people CPAP is used long term to keep symptoms controlled, but lifestyle changes such as weight loss can sometimes reduce severity. Your doctor will review what works best for you.
Sources
This health topic is for general information and is not a substitute for professional medical advice. Always consult a qualified clinician about your individual situation. See our medical disclaimer.