2023-05-31 09:08:06
For less than one euro, this clip to be fixed on the camera and the flash of a smartphone makes it possible to accurately measure the voltage by placing your finger on the accessory.
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engineers from theUniversity of California San Diego (UCSD) have developed a basic, inexpensive little clamp that puts a smartphone’s camera and flash to monitor blood pressure right at the user’s fingertips. This clamp would cost regarding 80 cents to make. Its designers even aim for a production cost close to 10 cents if it were produced massively.
According to them, this process is primarily intended for disadvantaged populations. With this system, they might monitor their blood pressure regularly to avoid treating pathologies too late, especially for the elderly and pregnant women. Using this clamp is very simple. It does not need any particular setting to be reliable. Printed in 3D, it attaches to the mobile and captures a camera lens as well as the mobile’s flash.
No adjustment necessary
The app activates the flash light, and when the user puts their finger on the clip holder, the smartphone flash illuminates the fingertip. This light is then projected into the clamp through a channel towards the camera. An image in a red circle is then displayed on the screen in the dedicated application. Multiple levels of pressure can be applied for best results.
The smartphone app extracts two main pieces of information from the red circle. By observing the size of the circle, the app can measure the pressure exerted by the user’s fingertip. By looking at the brightness of the circle, the app can measure the volume of blood flowing in and out of the fingertip. An algorithm converts this information into systolic and diastolic blood pressure readings. The process is close to what connected bracelets and watches deliver, but, unlike the latter, it requires no adjustment or settings. The result would be similar to that delivered by these systems, according to the researchers.
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