is a

Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.46 ...

-based leading manufacturer, developer and distributor of medical electronic equipment, which include EEGs, EMG measuring systems, ECGs, patient monitors and clinical information systems, with subsidiaries in the U.S.,

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

and

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an are ...

. The company's products are now used in more than 120 countries, and it is the largest supplier of EEG products worldwide. In 1972,

Takuo Aoyagi was a Japanese engineer, known for his work leading to the modern pulse oximeter. Early life, education and career Aoyagi was born February 14, 1936, in Niigata Prefecture, Japan. His parents were Monshichi and Tatsu Aoyagi. His father was a ma ...

, a researcher at the company, invented and patented the basic principles of

pulse oximetry Pulse oximetry is a noninvasive method for monitoring a person's oxygen saturation. Peripheral oxygen saturation (SpO2) readings are typically within 2% accuracy (within 4% accuracy in 95% of cases) of the more accurate (and invasive) reading o ...

. Two years later he developed the world's first pulse oximeter, which has helped improve patient safety during

anaesthesia Anesthesia is a state of controlled, temporary loss of sensation or awareness that is induced for medical or veterinary purposes. It may include some or all of analgesia (relief from or prevention of pain), paralysis (muscle relaxation), a ...

References

External links

Official website
{{Authority control Health care companies of Japan Manufacturing companies based in Tokyo Companies listed on the Tokyo Stock Exchange Electronics companies established in 1951 1951 establishments in Japan Japanese brands