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:
Sep. 17, 2002
Filed:
Sep. 13, 2000
Nihon Kohden Corporation, Tokyo, JP;
Abstract
A red light and an infrared light which are emitted from a light emitting portion are transmitted through a fingertip of a subject and are converted into electric signals by a light receiving portion The respective signals are separated and amplified and are then sent to a CPU In the CPU the input signals are divided into D.C. components DC and DC and A.C. components AC and AC changes &Dgr;A =(AC/DC) and &Dgr;A =(AC/DC) in an absorbance are calculated, high frequency components thereof are extracted, a mutual ratio &PSgr; is calculated, and a noise removing waveform is calculated based thereon. Based on the noise removing waveform, a pulse wave is detected, a pulse rate is calculated, a display wave form is calculated and an oxygen saturation is calculated. These are displayed through a display unit