A sleep specialist explores the efficacy, integration, emerging technologies, and challenges of HSAT at his Southern California practice.

By Ronald A. Popper, MD, FCCP, FAASM, DABSM

Home sleep apnea testing (HSAT) represents a paradigm shift in sleep apnea diagnosis, offering a patient-friendly alternative to traditional in-laboratory polysomnography (PSG). The evolution of these devices over the past decade has been driven by advancements in sensor technology, data processing, and a growing emphasis on patient-centered care.

This article explores the development, effectiveness, and prospects of HSAT, providing insights from my clinical experience.

Clinical Efficacy of HSAT

In terms of clinical efficacy, HSAT devices have shown considerable promise. Studies indicate that HSAT can effectively identify obstructive sleep apnea (OSA) in a broad range of patients,1 particularly those with a high pre-test probability of moderate to severe OSA.2 This efficiency is critical in a healthcare landscape where early diagnosis and treatment are paramount for preventing long-term complications.

Integrating HSAT in Clinical Practice

In my practice, integrating HSAT has streamlined the diagnostic pathway. It has enabled quicker diagnosis and initiation of treatment, which is particularly beneficial for patients residing in remote areas or those with mobility issues. In addition, the cost-effectiveness of HSAT compared to in-lab PSG has made sleep apnea diagnosis more accessible to a broader population.

I have observed a notable improvement in patient compliance and satisfaction with the introduction of HSAT. Case studies from my practice reveal that patients appreciate the convenience and comfort of testing in their own beds, leading to more representative sleep data. This improvement in patient experience directly translates to better diagnostic outcomes and treatment adherence.

Emerging Technologies in HSAT

Technological advancements in HSAT are continuously enhancing the quality and accuracy of data collected. For instance, devices like the WatchPAT ONE disposable system represent the forefront of these advancements. Though it’s just one option among many, its features—such as simplicity of use and comprehensive data collection—provide valuable insights. However, it’s important to acknowledge the diverse range of HSAT devices available in the market, each with attributes catering to different patient needs.

The Future of HSAT in Sleep Medicine

The future of HSAT looks promising, with innovations aimed at improving accuracy, user-friendliness, and data integration with electronic health records. As technology progresses, we can anticipate more sophisticated devices that offer detailed sleep analysis, potentially encompassing aspects like sleep architecture and more nuanced respiratory parameters.


Despite the benefits, HSAT does pose certain challenges. Limitations in detecting central sleep apnea and less accuracy in mild OSA cases are concerns. Additionally, the lack of direct observation and the limited number of parameters being monitored can result in missed diagnoses in disorders other than OSA. Patients with comorbid cardiovascular or neurologic disorders are best studied in a sleep center by full PSG. Careful patient selection and follow-up are critical components of using HSAT effectively.

Ronald A. Popper, MD, FCCP, FAASM, DABSM


HSAT has revolutionized the diagnosis of sleep apnea, making it more accessible, cost-effective, and patient-centric. As sleep medicine professionals, we should embrace these advancements while remaining cognizant of their limitations. By doing so, we can ensure that we provide the best possible care to our patients, enhancing both their sleep quality and overall health.

Sleep physician Ronald A. Popper, MD, FCCP, FAASM, DABSM, is the founder and medical director of the Southern California Pulmonary and Sleep Disorders Medical Center.


1. Chahar A, Joshi S, Roy N, Mahajan U. PMD41 assessing the clinical effectiveness of polysomnography and portable device (level III) for the diagnosis of sleep disorder breathing: Systematic review & meta-analysis. Value in Health. 2020 May;23(suppl_1):S196.

2. Rosen IM, Kirsch DB, Carden KA, et al; American Academy of Sleep Medicine Board of Directors. Clinical use of a home sleep apnea test: An Updated American Academy of Sleep Medicine position statement. J Clin Sleep Med. 2018 Dec 15;14(12):2075-7.