This study compares the diagnostic capability of a home sleep apnea testing device to polysomnography.
The current gold standard for sleep disordered breathing (SDB) diagnosis is in-laboratory polysomnography (PSG). A barrier of acceptance of Home Sleep Apnea Testing (HSAT) devices as a diagnostic test is their inability to accurately measure total sleep time (TST). A novel algorithm developed by ResMed, Ltd. allows the AL device to accurately calculate TST, however, this algorithm has not yet been validated. The ApneaLink Air (AL) device is a type III HSAT device. The device is capable of recording up to four channels of data including: flow and snore via a nasal cannula attached to a pressure transducer, a respiratory effort belt, a pulse oximeter to measure pulse and oxygen saturation, and an actigraphy monitor to measure TST along with flow. The AL device has been validated against PSG for AHI, and Cheyne-Stoke respiration detection . Further validation of the effort belt is necessary to determine the accuracy of the AL ability to differentiate between obstructive and central apneic events.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
130
ApneaLink Air to be used on each participant undergoing PSG
University of Florida
Gainesville, Florida, United States
University of Miami
Miami, Florida, United States
Diagnostic Sensitivity of Apnealink (AL) Compared With Polysomnography (PSG)
The Respiratory Event Index (REI) provided by the AL will be compared with the REI provided by the PSG test. REI will be scored according to American Academy of Sleep Medicine (AASM) 2012 guidelines. The REI provided by the AL for each participant is divided by the REI provided by the PSG for the same participant to get the diagnostic sensitivity of the Apnealink.
Time frame: Day 1
Diagnostic Sensitivity of Apnealink (AL) Compared With Polysomnography (PSG) to Identify Obstructive Events
Total number of Obstructive events reported by the ApneaLink (AL) compared with total number of Obstructive Events reported by polysomnography (PSG). The Obstructive events of the AL are divided by the Obstructive events of the PSG to get the diagnostic sensitivity. This is then compared with the threshold of 0.825
Time frame: Day 1
Diagnostic Sensitivity of the AL to Determine Central Events Compared With PSG
Total number of Central events reported by the ApneaLink (AL) compared with total number of Central Events reported by polysomnography (PSG). The Central events of the AL are divided by the Central events of the PSG to get the diagnostic sensitivity. This is then compared with the threshold of 0.825
Time frame: Day 1
Positive Likelihood Ratio of Apnealink Air
The positive likelihood ratio (the estimated sensitivity divided by 1 minus the estimated specificity) was calculated along with the associated one-sided 97.5% confidence interval. The positive likelihood ratio was compared with the threshold of 5 (AASM criteria for out-of-center testing devices12) using a Wald test.
Time frame: Day 1
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