The most common kind of sleep apnea is called Obstructive Sleep Apnea Syndrome. Sleep apnea means "cessation of breath." It is characterized by repetitive episodes of upper airway obstruction that occur during sleep, usually associated with a reduction in blood oxygen saturation. In other words, the airway becomes obstructed at several possible sites. The upper airway can be obstructed by excess tissue in the airway, large tonsils, and a large tongue and usually includes the airway muscles relaxing and collapsing when asleep. Another site of obstruction can be the nasal passages.

Sleep apnea is a disorder characterized by a reduction or cessation (pause of breathing, airflow) during sleep. It is common among adults but rare among children. There are two types of sleep apnea, the more common obstructive sleep apnea and the less common central sleep apnea, both of which will be described later in this article.

Behavioral changes

Behavioral changes are an important part of the treatment program, and in mild cases behavioral therapy may be all that is needed. The individual should avoid the use of alcohol, tobacco, and sleeping pills, which make the airway more likely to collapse during sleep and prolong the apneic periods. Overweight persons can benefit from losing weight. Even a 10 percent weight loss can reduce the number of apneic events for most patients. In some patients with mild sleep apnea, breathing pauses occur only when they sleep on their backs. In such cases, using pillows and other devices that help them sleep in a side position is often helpful.

Weight loss

Sleep apnea can be weight-related. Additional fat around the neck may make the airway narrower, making obstructions more likely to occur. For some overweight people, especially those with mild cases, losing weight can be an effective treatment. Or weight loss may reduce the severity of the sleep apnea. However, it may be hard to lose weight when you have untreated sleep apnea: you may be too tired to exercise and you may eat to stay awake. Also, it may take some time before the weight loss is achieved, so in light of the potential consequences of untreated OSA, using another treatment option while working towards the weight loss goal may be an option.

Pressure requirements

The optimal pressure to use in CPAP therapy is determined in a sleep laboratory study, during which the degree of apnea is monitored with various mask adjustments and increasing levels of air pressure. Pressures are measured in centimeters of water and can vary from 3 to 20 cm, with most patients requiring 6 to 12 cm of pressure to reduce their respiratory disturbance index to fewer than 10 events per hour.
Sleep on your side

People who experience sleep apnea only when they sleep on their backs can benefit from special pillows or folk remedies that encourage side-sleeping, such as the “tennis ball trick” (putting a tennis ball under you to make back-sleeping uncomfortable).

Pulse oximetry

Pulse oximetry is a non-invasive method which allows health care providers to monitor the oxygenation of a patient's blood. A sensor is placed on a relatively thin part of the patient's anatomy, usually a fingertip or earlobe, and red and infrared light is passed from one side to the other. Based upon the ratio of absorption of the red and infrared light caused by the difference in color between oxygen-bound (red) and unbound (blue) hemoglobin in the capillary bed, an approximation of oxygena.

Oral appliances

Another option is wearing an oral appliance designed to keep your throat open. CPAP is more effective than oral appliances, but oral appliances may be easier for you to use. Some are designed to open your throat by bringing your jaw forward, which can sometimes relieve snoring and mild obstructive sleep apnea.