Sumitomo Electric Industries, Limited

Yuichi Miyagawa

Masahiko Kanda

Kazuhiro Kuwa

Kiwamu Yoneda

Katsuyuki Kogo

A light-reflecting and heating type oximeter designed to measure non-invasively oxygen saturation in blood contained in a part of a living body by using an optical sensor. The optical sensor has a light-emitting section for emitting measuring light beams having at least two different wavelengths and a light-receiving section for receiving the measuring light beams activated by and reflected from the measuring part of the living body, and a heating means whose heating temperature is controllable is provided around the light-emitting and -receiving sections. The light receiving section and light emitting section are arranged in a particular positional relationship on a flat surface of the optical sensor housing to obtain accurate measurements. The arrangement enables measurement of oxygen saturation in any part of a living body including those in which blood vessels are distributed close to the body surface, such as finger tips, ears and the flat part of a newborn's foot.

Light-reflecting and heating type oximeter

An automatic calibration apparatus for a partial gas pressure measuring sensor supplies a gas having a high partial pressure (referred to as the high gas) and a gas having a low partial pressure (referred to as the low gas), to a gas selection device (103) from a gas supplier (101) through a detector device (102) which detects an abnormal gas supply condition outside given, satisfactory gas supply conditions. The selection device (103) selects the high gas or the low gas for supplying the selected gas to a sensor support (27 or 104). A partial gas pressure measuring sensor to be calibrated is placed on the sensor support and an automatic calibration controller (106) stores an output of the partial gas pressure measuring sensor (105) in an information storing memory. When the detector device, detects an abnormal gas supply of the high gas or the low gas, the automatic calibration controller stops the storing of the output of the partial gas pressure measuring sensor (105) in the storing means (107).

Growing community of inventors

Osaka, Japan

Yuichi Miyagawa