| abstract |
Methods, systems and apparatus for monitoring equivalent inner diameter of arteriole-like blood vessels and related cardiovascular parameters, where by measuring a time difference between signals from larger blood vessels, like arteries (excluding arterioles), and smaller blood vessels, similar to arterioles by their physiologic properties, also taking concurrent heart rate value into account. n In case the signal from larger blood vessels is measured geometrically relatively far from such a signal from smaller, arteriole-like blood vessels, said measured time difference may be evaluated by several ways in order to separate a PWTT component of time differences, obtained from said measured signals, from transient time component, including information about changes of diameter in arteriole-like vessels. It also may be effective defining more correctly the role of blood viscosity in monitored vascular condition of patient. |