[특허]Apparatus for measuring hemoglobin

Apparatus for measuring hemoglobin 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61B-005/00
출원번호	US-0623862 (1996-03-29)
우선권정보	JP-0076888 (1995-03-31)
발명자 / 주소	Aoyagi Takuo,JPX Fuse Masayoshi,JPX Kanemoto Michio,JPX Xie Cheng Tai,JPX
출원인 / 주소	Nihon Kohden Corporation, JPX
대리인 / 주소	Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
인용정보	피인용 횟수 : 111 인용 특허 : 0

초록 ▼

Light of various wavelengths emitted from light sources and transmitted through vital tissues is converted by light sensors and current/voltage transducers, into electric signals. The signals are converted into digital values by an A/D converter. The light source emits light of a wavelength which can be optically absorbed by water. A computer obtains a ratio of variations of the digital values for each wavelength, and calculates the values of tissue terms and the hemoglobin concentration on the basis of the ratios. In the calculation, since tissue terms of the wavelengths have mutual constant relationships, an equation which is prepared so that there exists only one unknown in the tissue terms is used.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for measuring hemoglobin, comprising:light irradiating means for irradiating vital tissue with light having different wavelengths, at least one of the wavelengths being optically absorbed by water;photoelectric converting means for converting light which is emitted from said light irradiating means and transmitted through the vital tissues into an electric signal;optical density variation calculating means for obtaining an optical density variation for each of the wavelengths from pulsation of an output of said photoelectric converting means, the optical density variation corresponding to the difference between pulsation of light transmitted through the tissue due to blood and pulsation of light transmitted through the tissue due to the tissue;optical density ratio calculating means for obtaining a ratio of optical density variations for the wavelengths which are obtained by said optical density variation calculating means; andhemoglobin concentration calculating means for obtaining a total hemoglobin concentration from an output of said optical density ratio calculating means.

이 특허를 인용한 특허 (111)

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연합인증

Apparatus for measuring hemoglobin 원문보기

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연구과제 타임라인

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Apparatus for measuring hemoglobin 원문보기

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이 특허를 인용한 특허 (111)

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