Patent ID: 9138161
Filing Date: 2015-09-22
Classification: A61B

Abstract:
1. A sensor for determining one or more cardiovascular quantities, comprising at least vascular stiffness of a vessel of a living being, the vessel being enclosed by tissue having a skin surface, comprising: said sensor being adapted for providing at least a first sensor signal indicating capacitance variations between electrodes in that the sensor comprises a first electrode at a first position and a second electrode at a second position with a distance D of at least 3 cm center to center between the first electrode and the second electrode, such that during use lines of flux between the first electrode and the second electrode substantially extend through and cross said vessel, and said sensor comprising a readout circuit having a first connection to the first electrode and a second connection to the second electrode, the readout circuit being configured for recording changes in capacitance between the first electrode and the second electrode, for a determination of a distension of the vessel based on at least said first sensor signal, said sensor being adapted for providing a second sensor signal indicating capacitance variations between electrodes, the sensor comprises wherein the sensor is adapted such that said first and second sensor signals are temporally displaced with a delay (τ), wherein said sensor signals are suitable for performing determination of a pulse propagation velocity (ν) based on a calculation of said predetermined distance (d wherein said sensor signals further are suitable for determining vascular stiffness based on the performed determination of the pulse propagation velocity (ν).