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2. Peripheral Arterial Tone - Wikipedia

   en.wikipedia.org/wiki/Peripheral_Arterial_Tone

   The PAT signal is a form of pulse wave amplitude measured by incorporating both a unified pressure field and a specific isosbestic wavelength.Applying a uniform pressure field around the measured surface releases arterial wall motion restriction, magnifies the dynamic range of the recorded signal, and prevents the distention of the veins distal to the site of pressure application.

3. Polysomnography - Wikipedia

   en.wikipedia.org/wiki/Polysomnography

   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").

4. Sleep apnea - Wikipedia

   en.wikipedia.org/wiki/Sleep_apnea

   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 ...

5. Obstructive sleep apnea - Wikipedia

   en.wikipedia.org/wiki/Obstructive_sleep_apnea

   Uvulopalatopharyngoplasty with or without is the most common surgery for patients with obstructive sleep apnea. Studies have shown that treatment effect of tonsillectomy increases with tonsil size. [136] However, there is little randomized clinical trial evidence for other types of sleep surgery. [116]

6. Respiratory disturbance index - Wikipedia

   en.wikipedia.org/wiki/Respiratory_disturbance_index

   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]

7. Sleep study - Wikipedia

   en.wikipedia.org/wiki/Sleep_study

   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 ...