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Home Sleep Test - Resources for US Clinics

Thank you for choosing Belun Ring home sleep test. This page will give you the resource for running the test and interpreting the results.  Feel free to contact us by Email or WhatsApp if you have any questions.




  • Staff Instructions – Follow these steps to prepare Belun Ring for the patients, upload data and download reports.
  • Ring size – Make sure you choose a tight fit Ring size for the patient to secure data quality for analysis and reporting.
  • Patient Instructions – The procedure your patient will go through during the test (video guide)

Test Duration

  • Minimum 1 hour of sleep is required to generate a sleep report. 6-hour recording is recommended.
  • Testing for 3 nights is recommended for suspected Obstructive Sleep Apnea.  Multiple night testing help reduce first-night effect and compare night-to-night variation.

Exclusion Criteria

  • Patients on home oxygen, non-invasive ventilator, diaphragmatic pacing, or nerve stimulator
  • Patients with pacemaker, defibrillator, left ventricular assist device, or status post cardiac transplantation
  • Patients with atrial fibrillation


  • Avoid alcohol and caffeine during the afternoon and evening before test.
  • Don’t nap during the day.
  • Effect of sleep medicines should be noted.  Certain classes of sleep medicines induce muscle relaxation and more respiratory events.


Sample Report

Clinical Validation

  • Gu W, Leung L, Kwok KC, Wu IC, Folz RJ, Chiang AA. Belun Ring Platform: a novel home sleep apnea testing system for assessment of obstructive sleep apnea. J Clin Sleep Med. 2020;16(9):1611-1617.
  • Yeh E, Wong E, Tsai CW, et al. Detection of obstructive sleep apnea using Belun Sleep Platform wearable with neural network-based algorithm and its combined use with STOP-Bang questionnaire. PLoS One. 2021;16(10):e0258040.
  • Ou YH, Ong J, Thant AT, et al. The Belun sleep platform to diagnose obstructive sleep apnea in patients with hypertension and high cardiovascular risk. J Hypertens. 2023;41(6):1011-1017.
  • Tsai CW, et al. Correlation of Pulse Rate Variability (PRV) and Heart Rate Variability (HRV) Metrics During Sleep in Subjects Suspected of OSA, Sleep, 2023;46(S1):A420-A421.
  • Strumpf Z, Gu W, Tsai CW, et al. Belun Ring (Belun Sleep System BLS-100): Deep learning-facilitated wearable enables obstructive sleep apnea detection, apnea severity categorization, and sleep stage classification in patients suspected of obstructive sleep apnea. Sleep Health. 2023;S2352-7218(23)00090-6.

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