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Sleep deprivation is a significant societal problem. It is estimated that around 35.2% of all adults in the US sleep less than 7 hours. [3] Lifestyle choices, health conditions, and the use of stimulants are examples of some of the causes that underlie sleep deprivation in humans.
Polysomnography (PSG) is a multi-parameter type of sleep study [1] and a diagnostic tool in sleep medicine.The test result is called a polysomnogram, also abbreviated PSG.The name is derived from Greek and Latin roots: the Greek πολύς (polus for "many, much", indicating many channels), the Latin somnus ("sleep"), and the Greek γράφειν (graphein, "to write").
The respiratory disturbance index (RDI)—or respiratory distress Index—is a formula used in reporting polysomnography (sleep study) findings. Like the apnea-hypopnea index (AHI), it reports on respiratory distress events during sleep, but unlike the AHI, it also includes respiratory-effort related arousals (RERAs). [1]
Some people with sleep apnea are unaware they have the condition. [1] In many cases it is first observed by a family member. [1] An in-lab sleep study overnight is the preferred method for diagnosing sleep apnea. [15] In the case of OSA, the outcome that determines disease severity and guides the treatment plan is the apnea-hypopnea index (AHI ...
A sleep study is a test that records the activity of the body during sleep. There are five main types of sleep studies that use different methods to test for different sleep characteristics and disorders. These include simple sleep studies, polysomnography, multiple sleep latency tests (MSLTs), maintenance of wakefulness tests (MWTs), and home ...
The information includes sleep onset time, sleep latency, number of awakenings in a night, time in bed, daytime napping, sleep quality assessment, use of hypnotic agents, use of alcohol and cigarettes, and unusual events which may influence a person's sleep. Such a log is usually made for one or two weeks before visiting a somnologist.