These devices deliver more pressure while you're breathing in, and lower pressure when you exhale. CPAP devices deliver a constant stream of air that keeps the airway passages open while you sleep.įor some people, bilevel positive airway pressure (biPAP or bPAP) machines may be a more comfortable choice. This is a device that consists of a tight-sealing nosepiece through which a gentle stream of air is delivered to enhance your breathing.Ĭontinuous positive airway pressure (CPAP) is one type of PAP machine. They can come into the room to free up the wires if you need to get up during the night.ĭuring the study, the technologist may have you try a positive airway pressure (PAP) machine for sleep apnea. If you need assistance, you can talk to them through the monitoring equipment. Polysomnography technologists monitor you throughout the night. Snoring and other noise you may make as you sleep.While you sleep, a technologist monitors your: A small clip also is placed on your finger or ear to monitor the level of oxygen in your blood. The sensors are connected by wires to a computer, but the wires are long enough to let you move around in bed. It also has an audio system, so they can talk to you and hear you from their monitoring area outside the room.Īfter you get ready for bed, one of the technologists will place sensors on your scalp, temples, chest and legs using a mild adhesive, such as glue or tape. The sleeping area will typically have a low-light video camera, so the polysomnography technologists monitoring you can see what's happening in the room when the lights are out. You won't share the room with anyone else. The room where polysomnography is done is similar to a hotel room, and it's dark and quiet during the test. Your doctor may ask you to keep a sleep log. You'll need to place the sensors on your body and turn on the machine according to the instructions. If you're having a home sleep apnea test, you should follow your regular bedtime schedule. You may bring items you use for your bedtime routine, and you can sleep in your own nightclothes. If you're having a full polysomnography in a sleep center, you'll arrive in the evening and stay overnight. What you can expect During polysomnography Ask questions if you're unsure about how the test or equipment works. You'll be given instructions describing how to use the equipment. But don't put on lotions, gels, colognes or makeup before the test, as these can interfere with the use of the electrodes.įor a home sleep apnea test, the equipment is delivered to you or you can pick up the equipment at your doctor's office. You may be asked to bathe or shower before your sleep study. Napping in the afternoon before a sleep study is discouraged. Alcohol and caffeine can change your sleep patterns, and they may make symptoms of some sleep disorders worse. You may be advised to avoid drinks or food containing alcohol or caffeine during the afternoon and evening before polysomnography. The most common side effect is skin irritation caused by the adhesive used to attach test sensors to your skin. Polysomnography is a noninvasive, painless test. If you consistently have trouble falling asleep or staying asleep, your doctor may recommend polysomnography. Your doctor may perform this test if you do unusual activities during sleep, such as walking, moving around a lot or rhythmic movements. This sleep disorder involves acting out dreams as you sleep. You experience overwhelming daytime drowsiness and sudden attacks of sleep in this condition. This condition is sometimes associated with restless legs syndrome. In this sleep disorder, you involuntarily flex and extend your legs while sleeping. In this condition, your breathing repeatedly stops and starts during sleep. Sleep apnea or another sleep-related breathing disorder.Your doctor may recommend polysomnography if he or she suspects you have: Sleep disorders can disturb this sleep process. You normally go through multiple sleep cycles a night, cycling between NREM and REM sleep in about 90 minutes. After an hour or two of NREM sleep, your brain activity picks up again, and rapid eye movement (REM) sleep begins. Your eyes don't move back and forth rapidly during NREM, in contrast to later stages of sleep. During this stage, your brain waves, as recorded by electroencephalography (EEG), slow down considerably. The normal process of falling asleep begins with a sleep stage called non-rapid eye movement (NREM) sleep. One style also incorporates information on blood vessel tone. They generally record your breathing rate and airflow, as well as oxygen levels and heart rate. There are different types of home sleep apnea test devices using different combinations of sensors. Polysomnography monitors your sleep stages and cycles to identify if or when your sleep patterns are disrupted and why.
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