The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2013
Filed:
Jun. 09, 2009
Jeroen Veen, Eindhoven, NL;
Theodorus Petrus Henricus Gerardus Jansen, Eindhoven, NL;
Henricus Renatus Martinus Verberne, Eindhoven, NL;
Tim Corneel Wilhelmus Schenk, Eindhoven, NL;
Lorenzo Feri, Eindhoven, NL;
Jeroen Veen, Eindhoven, NL;
Theodorus Petrus Henricus Gerardus Jansen, Eindhoven, NL;
Henricus Renatus Martinus Verberne, Eindhoven, NL;
Tim Corneel Wilhelmus Schenk, Eindhoven, NL;
Lorenzo Feri, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a method of monitoring a vital parameter of a patient by measuring attenuation of light emitted onto tissue of the patient, comprising the following steps: modulating the light with a modulation frequency or/and a modulation code; emitting the modulated light onto the tissue of the patient; collecting light which is transmitted through the tissue or/and which is reflected from the tissue; demodulating the collected light; analyzing the demodulated collected light with regard to interference with ambient light; determining a modulation frequency or/and a modulation code for which interference with the ambient light is minimized or falls under a predefined threshold; and setting the modulation frequency or/and the modulation code for modulating the light according to the determined modulation frequency or/and a modulation code for which interference with the ambient light is minimized or falls under a predefined threshold. In this way a versatile and reliable possibility of monitoring a vital parameter of a patient with a high signal-to-interference ratio is provided.