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. 08, 2001
Filed:
Jul. 19, 1999
Takuo Aoyagi, Tokyo, JP;
Masayoshi Fuse, Tokyo, JP;
Chen-tai Xie, Tokyo, JP;
Michio Kanemoto, Tokyo, JP;
Nihon Kohden Corporation, Tokyo, JP;
Abstract
Irradiating device,of a pulse oximeter includes a scattering plate,Scattering light is projected into a living tissue. The diameter of the incident area is sufficiently large compared with that of a light receiving area or vice versa. Therefore, tissue terms in a theoretical formula of &PHgr; which represents a ratio of changes of optical densities of tissue measured with two wavelengths are not dependent on the wavelength. The digital processor,calculates an oxygen saturation by substituting &PHgr; measured into simultaneous equations.
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