> The speed of the pressure wave is one signal that correlates with blood pressure. Can it distinguish 200/180 from 120/100? I expect it to depend more on the

> The speed of the pressure wave is one signal that correlates with blood pressure. Can it distinguish 200/180 from 120/100? I expect it to depend more on the difference than the absolute value, but fluid dynamic inside flexible tubes is a nightmare. > They did run a clinical study as well, so presumably more details will come out whenever that's published. I'm always more skeptical.