From: here@is.invalid   
      
   Caltech Team Develops First Noninvasive Method to Continually Measure   
   True Blood Pressure   
      
   Solving a decades-old problem, a multidisciplinary team of Caltech   
   researchers has figured out a method to noninvasively and continually   
   measure blood pressure anywhere on the body with next to no disruption   
   to the patient. A device based on the new technique holds the promise   
   to enable better vital-sign monitoring at home, in hospitals, and   
   possibly even in remote locations where resources are limited.   
      
   The new patented technique, called resonance sonomanometry, uses sound   
   waves to gently stimulate resonance in an artery and then uses   
   ultrasound imaging to measure the artery's resonance frequency,   
   arriving at a true measurement of blood pressure. In a small clinical   
   study, the device, which gives patients a gentle buzzing sensation on   
   the skin, produced results akin to those obtained using the   
   standard-of-care blood pressure cuff.   
      
   "We ended up with a device that is able to measure the absolute blood   
   pressure--not only the systolic and diastolic numbers that we are used   
   to getting from blood pressure cuffs--but the full waveform," says   
   Yaser Abu-Mostafa (PhD '83), professor of electrical engineering and   
   computer science and one of the authors of a new paper describing the   
   technique and device in the journal PNAS Nexus. "With this device you   
   can measure blood pressure continuously and in different sites on the   
   body, giving you much more information about the blood pressure of a   
   person."   
      
   https://www.caltech.edu/about/news/caltech-team-develops-first-n   
   ninvasive-method-to-continually-measure-true-blood-pressure   
      
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