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:
Apr. 09, 2013
Filed:
Sep. 24, 2008
Cristian Presura, Veldhoven, NL;
Carsten Heinks, Neuenhaus, DE;
Olaf Such, Aachen, DE;
Gary Nelson Garcia Molina, Eindhoven, NL;
Gert Hooft, Eindhoven, NL;
Cristian Presura, Veldhoven, NL;
Carsten Heinks, Neuenhaus, DE;
Olaf Such, Aachen, DE;
Gary Nelson Garcia Molina, Eindhoven, NL;
Gert Hooft, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a blood oximeter for measuring the oxygenation and at least one other parameter of flowing blood in living tissue. According to the invention, the blood oximeter comprises two lightsources () emitting light of different wavelengths into tissue, and preferably a light detector () for detecting a transmitted and/or reflected part of the light emitted into the tissue, wherein at least one of the light sources is a laser with a laser cavity emitting a laser beam, the laser being adapted to allow a part of the laser beam which is scattered by the tissue to re-enter into the laser cavity, and wherein a laser beam sensor () for measuring the light emitted from the laser is provided, the laser beam sensor (), thus, obtaining a signal which varies in accordance with the self-mixing interferometric effect between the original laser beam and the scattered laser beam. Accordingly, such a blood oximeter is provided that performs well at low perfusion and which further allows for reliable measurements.