A sphygmomanometer that uses LED light to measure is of concern

Japanese universities show sphygmomanometers that measure blood pressure with just a finger touch. The advantage of this product is that it can be measured without the need for a compression belt, so it is easy to measure blood pressure for infants and the elderly. In addition, when used for daily health management, it is also possible to save the trouble of rolling up the compression belt and to measure blood pressure more easily. Therefore, "large manufacturers of health care equipment with a high share in the field of sphygmomanometers came to the booth for several days during the exhibition and repeated research."

This sphygmomanometer uses light to measure. Equipped with LEDs and phototransistors, the phototransistors are used to detect the reflected light from the LEDs. The specific principle has not been announced, but according to the introduction of the Japanese university, the "phase shift method" technology developed by the professor of the university's engineering department. The tail strands indicate that "the S/N will be greatly improved after using the phase shift method, so it can be measured with extremely high precision."

After exhibiting at MEDICA 2012, the Japanese University received a lot of consultations from companies around the world. According to the introduction of the tail stock, the kernel has recently been successfully single-chip, including the data processing part using the phase shift method. At present, the size is 1cm2 square. "There is also a reduction in the number of mm squares. In the future, it can be equipped on a portable terminal, and it is also expected to use the flash LED equipped with a smart phone to measure the pulse and blood pressure through a smart phone" (Taiwan Dingfu) . The University of Japan intends to cooperate with companies in 2013 to start providing related chips.