Device, system and method for determining at least one vital sign of a subject

Gerard de Haan (Inventor), M.J.H. van Gastel (Inventor), Aline Serteyn (Inventor)

Research output: PatentPatent publication

Abstract

The present invention relates to a device, system and method for determining at least one vital sign of a subject. The device (130) comprises an input interface (131) configured to obtain at least three detection signals derived from detected electromagnetic radiation transmitted through or reflected from a skin region of a subject, wherein each detection signal comprises wavelength-dependent reflection or transmission information in a different wavelength channel, a transformation unit (132) configured to transform the at least three detection signals into at least three transformed detection signals by temporally normalizing the at least three detection signals or applying a non-linear transfer function on the at least three detection signals, a projection unit (133) configured to project the at least three transformed detection signals into at least two projected signals in a subspace orthogonal to a predetermined distortion direction, and a vital sign determination unit (134) configured to determine an indicator or concentration of blood components or species as vital sign from said at least two projected signals by indirectly determining the relative strength of a pulsatile component in said at least two projected signals.
Original languageEnglish
Patent numberWO2019145142
Priority date24/01/18
Filing date1/08/19
Publication statusPublished - 1 Aug 2019

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