News & Media

Wearable Medical Devices Give Abundant Data—and Risks

Miranda Felde, MHA, CPHRM, Vice President, Patient Safety and Risk Management

Wednesday, March 06, 2019

Since 2013, the number of US consumers tracking their health data with wearables has doubled.[1] And that number continues to rise: During the third quarter of 2018, the wearables market saw a nearly 60 percent increase in earnings over the prior year.[2]

Wearables are electronic devices worn on the body, often like a watch. Wearables can track patient data like heart rate, blood pressure, or blood glucose. They can also track activity level, e.g., counting steps.

Promoters of wearables believe wearables will drive the transition to intelligent care, whereby physicians have access to more data—in which they can identify actionable components. Florence Comite, MD, a New York endocrinologist who describes wearables as “almost like magic,” uses data from wearables to tailor her interventions for patients with chronic conditions.[3]

Wearables can help patients take action, too. In one recent study, diabetes patients using a wearable app showed randomized controlled trial results comparable or superior to patients taking diabetes medications.[4]

Though each device has its pros and cons, all wearables generate concerns for physicians, including:

  • Poor data quality: Data from wearables may or may not be reliable enough for medical use.[5]
  • Data fixation: Patients may fixate on one number—steps per day, for instance—at the expense of other health variables, such as their diet, sleep habits, etc.
  • Lack of interoperability with electronic health records (EHRs): If a patient’s wearable cannot stream data to the patient’s EHR, then how can the physician’s practice securely acquire the data?
  • Data saturation: Physicians receiving patient data from wearables risk being soaked by a data fire hose.[6] Physicians need a plan and a process to determine what measurements are relevant to a given patient.
  • Unclear physician responsibilities for collecting, monitoring, and protecting data: HIPAA applies to patient data collected by physicians,[7] but differing state laws mean that a physician’s specific responsibilities for monitoring and protecting patient data vary by location.
  • Lack of data security—and liability for physicians: Wearables are subject to cyberattack. In addition to presenting obvious risks to patient safety, this may also present liability risks to physicians—who may be expected to notify patients of recalls issued for their wearables.[8]  


[1] Donovan F. Despite patient privacy risks, more people use wearables for health. Health IT Security. October 1, 2018. https://healthitsecurity.com/news/despite-patient-privacy-risks-more-people-use-wearables-for-health. Accessed November 28, 2018.

[2] Zaninello L. The wearables market is booming: Fitbit scares Apple and Google. Android Pit. November 26, 2018. https://www.androidpit.com/wearable-market-growth-fitbit-scares-apple-and-google. Accessed November 28, 2018.

[3] Eramo L. Do doctors care about your wearable data? Future Health Index. October 18, 2017. https://www.futurehealthindex.com/2017/10/18/doctors-care-wearable-data/. Accessed November 29, 2018.

[4] Rhew D, panel moderator. Disruptive digital health technology. A4M MMI World Congress 2017. Dec 14; Las Vegas, NV.

[5] Piwek L, Ellis DA, Andrews S, Joinson A. The rise of consumer health wearables: Promises and barriers. PLOS medicine. February 2, 2016. https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1001953. Accessed November 28, 2018.

[6] Donovan F. How does HIPAA apply to wearable health technology? Health IT Security. July 24, 2018. https://healthitsecurity.com/news/how-does-hipaa-apply-to-wearable-health-technology. Accessed November 28, 2018.

[7] Ibid.

[8] Carman SL, Umhofer RH. Wearable medical devices can raise issues for healthcare professionals. Healthcare Analytics News. October 30, 2018. https://www.hcanews.com/news/wearable-medical-devices-can-raise-issues-for-healthcare-professionals. Accessed November 28, 2018.