Experimental investigation into radar-based central blood pressure estimation
Journal article, Peer reviewed
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Original versionIET radar, sonar & navigation 2015, 9(2):145-153 10.1049/iet-rsn.2014.0206
To assess whether radar technology can be used for monitoring blood pressure via information from the aorta, two experiments were performed: (i) measurements on a phantom model and (ii) acquisitions on a human subject for in vivo experiments. A linear dependency of phase on radius in the radar echoes in the phantom model showed that the information regarding the radius of a circular, cylindrical object depended on the clutter environment: in a low-clutter case two distinct reflections were identified, whereas in the high-clutter case it was possible to extract a proxy. Radar echoes from antennas strapped to the back of a human subject showed a clear signature from a discernible, distinct reflector believed to be the aorta. However, as for the highclutter case, only a proxy for aortic radius is available as basis for estimation, which is most likely coupled with aortic displacements.