Sensor for vascular compliance and blood pressure

Author

Lading, Lars ; Nyboe, Flemming ; Nilsson, Daniel ; Pranov, Henrik ; Hansen, Tine Willum

Author_Institution

Microtechnol., Danish Technol. Inst., Taastrup, Denmark

fYear

2009

fDate

25-28 Oct. 2009

Firstpage

181

Lastpage

184

Abstract

A method for continuous sensing of blood pressure and vascular compliance without affecting the state of the patient has been devised. The scheme is based on sensing vascular distention by a capacitive method utilizing the fact that the dielectric constant of blood is different from the dielectric constant of the surrounding tissue. The vascular stiffness is determined by measuring the pulse propagation velocity through an artery. Knowing the distention and the stiffness both vascular compliance and blood pressure can be calculated. A special signal processing scheme is devised in order to eliminate the effects of movements that are not synchronous with the heart beat. It is based conditional averaging and matched filtering. A wireless implementation has been verified.

Keywords

blood pressure measurement; matched filters; patient monitoring; permittivity; wireless sensor networks; artery; blood pressure sensor; capacitive method; dielectric constant; heart beat; matched filtering; pulse propagation velocity; vascular compliance sensor; vascular stiffness; Arteries; Blood pressure; Dielectric constant; Dielectric measurements; Filtering; Heart beat; Matched filters; Pulse measurements; Signal processing; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2009 IEEE

Conference_Location

Christchurch

ISSN

1930-0395

Print_ISBN

978-1-4244-4548-6

Electronic_ISBN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2009.5398199

Filename

5398199