Abstract
The present invention relates to a device, system and a method for extracting physiological information indicative of at least one vital sign of a subject from detected electromagnetic radiation transmitted through or reflected from a subject (14). The device comprises an input interface (30) for receiving a data stream of detection data derived from detected electromagnetic radiation transmitted through or reflected from a skin region of a subject, wherein the detection data comprises wavelength-dependent reflection or transmission information in at least two signal channels representative of respective wavelength portions, a signal mixer (32) for dynamically mixing the at least two signal channels into at least one mixed signal, a processor (34) for deriving physiological information indicative of at least one vital sign from the at least one mixed signal, and a controller (36) for controlling the signal mixer to limit the relative contributions of the at least two signal channels mixed into at least one mixed signal and/or the rate-of-change at which said relative contributions are allowed to dynamically change.
| Original language | English |
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| Patent number | WO2015169634 |
| IPC | A61B 5/ 1455 A I |
| Priority date | 8/05/14 |
| Publication status | Published - 12 Nov 2015 |