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Completed

NCT Number: NCT04885062

Belun Ring Platform With an Improved Algorithm for OSA Assessment

OSA is commonly diagnosed with either attended in-lab polysomnography (PSG) or unattended home sleep apnea testing (HSAT). The BLS-100 (Belun Technology Company Limited, Hong Kong) is a novel neural network-based HSAT platform consists of a ring shape pulse oximeter sensor, a cradle, and an improved proprietary analytic algorithm. This study investigates the hypothesis that the BLS-100 is a reasonable HSAT device for OSA assessment.

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Key information

Conditions

Sleep-Disordered Breathing Apnea Dyssomnias Nervous System Diseases Respiration Disorders Respiratory Tract Diseases Sleep Apnea Syndromes Sleep Apnea, Obstructive Sleep Architecture Sleep Disorders, Intrinsic Sleep Wake Disorders

Age range

18 year–80 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University Hospitals Cleveland Medical Center

Cleveland, Ohio, 44106, United States

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Provision of signed and dated informed consent form.
  • Age 18-80
  • Clinically assessed and suspicious for OSA

Exclusion criteria

  • Full night PAP titration study
  • On home O2, noninvasive ventilator, diaphragmatic pacing, or any form of nerve stimulator
  • Having atrial fibrillation-flutter, pacemaker/defibrillator, LVEF < 55%, left ventricular assist device (LVAD), or status post cardiac transplantation
  • Patients taking narcotics
  • Recent hospitalization or recent surgery in the past 30 days
  • Unstable cardiopulmonary status on the night of the study judged to be unsafe for sleep study by the sleep tech and/or the on-call sleep physician

An individual who meets the above criteria but fails to have at least 4 hours of technically valid sleep based on BLS-100 in a diagnostic study or at least 3 hours of technically valid sleep during the diagnostic portion of a split night study will be excluded from statistical analyses.

Treatment and study plan

Belun Ring

Device

The Belun Ring sensor will be applied to the proximal phalanx of the index finger in the non-dominant hand of the participating individuals prior to their sleep onset in the sleep lab and will be removed upon awakening at the end of the sleep period on the following morning. The attended in-lab sleep study will be performed simultaneously in a standard fashion.

PSG

Diagnostic Test

All patients scheduled for attended overnight in-lab polysomnography (PSG) in our 2 sleep labs will undergo PSG testing. On the same night of the PSG testing, these same patients will also wear the Belun Ring device. After the study, we will compare results of the Belun Ring device vis-à-vis with the results of the PSG on the same patient.

Primary outcomes

  1. To Evaluate the Ability of the Belun Ring Pulse Oximeter to Gauge the Apnea-Hypopnea Index (AHI)

    Time frame: 1 overnight sleep study (1 Day)

    Apnea-Hypopnea Index (AHI) is defined as the total number of apnea and hypopnea events per hour of sleep, where higher values indicate more severe sleep-disordered breathing. In this study, standard overnight polysomnography(PSG) and Belun Ring pulse oximeter were simultaneously measured. The AHI derived from PSG data was served as the reference.

    The primary outcome evaluates the accuracy of the Belun Ring by calculating the difference in Ring-REI by the Belun Ring compared with AHI derived from PSG recordings for each participant. The difference was calculated as:

    Ring-REI (Belun Ring) - AHI (PSG).

    Negative values indicate that the Belun Ring estimated a lower AHI than PSG, while positive values indicate that the Belun Ring estimated a higher AHI than PSG.

    Summary statistics of these differences were used to assess agreement between the Belun Ring device and PSG in measuring sleep apnea severity.

Secondary outcomes

  1. Sleep Stage Parameters

    Time frame: 1 overnight sleep study (1 Day)

    To determine the accuracy of BLS-100 sleep stage parameters to classify the human sleep stage (Wake, REM and Non-REM) by comparing to the classification results of in-lab PSG.

Sponsors and collaborators

Lead sponsor

Belun Technology Company Limited

Other

Collaborators

  • University Hospitals Cleveland Medical Center

Registry information

Official study title

Belun Ring Platform (BLS-100) Home Sleep Apnea Testing Device With an Improved Algorithm for Assessment of Obstructive Sleep Apnea: A Comparison to In-Lab Polysomnography

Important dates

Study start
2021
Primary completion
2021
Study completion
2022
First posted
May 13, 2021
Registry last updated
Apr 13, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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