Patent ID: 6898451
Filing Date: 2005-05-24
Classification: A61B

Abstract:
1. A method of non-invasively measuring the concentration of one or more blood analytes in a portion of tissue of a human or animal comprising the steps of: positioning the portion of tissue near a light source and one or more sensors such that infrared radiation transmitted by the light source is reflected from or transmitted through the portion of tissue and onto the one or more sensors; exposing the portion of tissue to infrared radiation from the light source; detecting the infrared radiation transmitted or reflected from the portion of tissue with the one or more sensors; generating spectral data from the one or more sensors in response to receiving the infrared radiation and communicating the spectral data to a processor; determining the concentration of one or more blood analytes by orthogonal analysis using self calibration of the spectral data in which the ratio of blood analyte to a blood reference material is used; and displaying the concentration of the one or more blood analytes.