Press Release

Quick, Easy, Inexpensive Cortisol Testing Should Soon Be Available on All Smartphones

Chicago, IL June 24, 2014

Researchers have developed a device that uses any smartphone to measure the cortisol concentration in saliva. The device was presented Tuesday, June 24, at ICE/ENDO 2014, the joint meeting of the International Society of Endocrinology and the Endocrine Society in Chicago.

"We have developed a method for measuring cortisol in saliva using a smartphone and a disposable test strip. This innovation enables anyone with a smartphone to measure their salivary cortisol level quickly, accurately, and affordably," said lead study author Joel R. L. Ehrenkranz, MD, director of diabetes and endocrinology of the Department of Medicine at Intermountain Healthcare in Murray, Utah.

Cortisol is a hormone made by the adrenal glands that's essential for the body’s response to stress, and measuring cortisol can help diagnose adrenal diseases and monitor stress levels. Current testing for salivary cortisol levels involves collecting a saliva sample and sending it to a clinical lab for analysis.

"A lab charges about $25 to $50 for a quantitative salivary cortisol test and has a turnaround time of days to a week. This test, taken in a medical office or at home, will cost less than $5 and take less than 10 minutes," Dr. Ehrenkranz said. "The device is a reader that includes a case, a light pipe, and a lens and costs about a dollar to make. There is no battery power and it's unbreakable, passive and reusable."

Doctors worldwide can use the smartphone test to help them diagnose adrenal insufficiency and hypercortisolism and monitor physiologic variations in cortisol concentration; and individuals can monitor their own cortisol levels whenever they like.

The software is "operating-system-agnostic," he explained, meaning that the device can be used on all platforms, including iOS, Android, Windows, and BlackBerry, and it has a universal form factor that works with all smartphones.

The person being tested inserts a straw-like saliva collector under the tongue. The collector wicks the saliva by capillary action to an immunoassay strip housed in a cassette and the cassette is inserted into the reader. The smartphone uses its camera and flash to take a picture of the saliva-coated strip and an algorithm converts the image's pixel density to a cortisol value.

Marketing this test as a cortisol assay would make it a class 2 medical device, Dr. Ehrenkranz explained. He and his research team are now collecting clinical data for the FDA submission, and hope to attain approval in 2015.

This study was privately funded.

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Endocrinologists are at the core of solving the most pressing health problems of our time, from diabetes and obesity to infertility, bone health, and hormone-related cancers. The Endocrine Society is the world’s oldest and largest organization of scientists devoted to hormone research and physicians who care for people with hormone-related conditions.

The Society has more than 18,000 members, including scientists, physicians, educators, nurses and students in 122 countries. To learn more about the Society and the field of endocrinology, visit our site at www.endocrine.org. Follow us on Twitter at @TheEndoSociety and @EndoMedia.


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Media Contacts

Colleen Williams Manager, Public Relations Phone: (202)-971-3611 cwilliams@endocrine.org

Jenni Glenn Gingery Associate Director, Communications and Media Relations Phone: (202)-971-3655 jgingery@endocrine.org

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