Can the phone case really measure blood pressure? Uncertain measurement accuracy
According to foreign media The Verge, a new smart phone accessory allows people to easily measure blood pressure without having to squeeze the arm with an air bag. It is still too early to see if this technology can be put into practical use, but if it is implemented, it can help more people, especially those in developing countries, to check whether they are at risk of heart disease.
The device, described in a study published in the Journal of Scientific Translational Medicine on Wednesday, consists of a 3D printed casing attached to the back of a smartphone. According to the study, the app measures blood pressure when a person presses a button sensor with a finger. However, according to some experts, the device has been tested on a small number of people - it is not yet confirmed whether the measurement results are completely accurate.
High blood pressure can cause stroke, heart disease and kidney failure. But measuring blood pressure is very difficult. But the process of measuring blood pressure is not convenient. As a result, scientists have been working hard to create portable devices that can easily measure blood pressure several times a day.
Edgar Raymond, a hypertension expert at Johns Hopkins University School of Medicine, said, “On the surface, this is a good idea and people want to have it. But the biggest problem is accuracy.â€
TImothy Plante, an assistant professor at the University of Vermont's Larner School of Medicine, agrees. Although using a smartphone to measure blood pressure will change the "rules of the game," it is too early to say that the device will work. He hopes to see researchers testing on more patients. Otherwise, it is impossible to know if the device is accurate enough when used at home.
Currently the device has been tested on 30 people, 90% of whom can use the device correctly after practicing one or two times. Most people who participated in the test had normal blood pressure. At least 85 people with different blood pressure levels must be tested before a device is placed on the market.
The researchers believe that once verified, the device can help people easily measure their blood pressure and determine if they need medication. Studies have shown that only about 45% of people with high blood pressure in developing countries know their condition. “If they know, then they can do something in their lives to reduce the risk of their stroke and heart attack.â€
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