Pulse oximetry was developed in 1972 in Japan using light absorption measurements to noninvasively measure oxygen saturation levels. It was first tested on patients in 1975 and found to safely and accurately measure oxygen levels, saving thousands of lives each year. Over time, pulse oximeters have become more affordable and available for home use to monitor respiratory conditions.

3. History of Pulse Oximeter
 Pulse oximetry was developed in 1972, by Takuo Aoyagi and Michio Kishi,
bioengineers, at Nihon Kohden using the ratio of red to infrared light absorption of
pulsating components at the measuring site. Susumu Nakajima, a surgeon, and his
associates first tested the device in patients, reporting it in 1975.
 Oximetry is the measurement of oxygen saturation in arterial by transmiting light
through a translucent area of a patient. This is done noninvasively and the oxygen
saturation level is computed based on the measurement. This device is responsible
for saving thousands of lives each year.
 Pulse oximeter has become affordable and widely available for home use.

14. Uses and Benefits of Pulse Oximeters
 A pulse oximeter is a device intended for the non-invasive measurement of arterial blood
oxygen saturation (SpO2) and pulse rate.
 Oximeters are widely used in hospitals, medical clinics, operating rooms, and homes
 Pulse oximeter is used medically by patients with asthma, emphysema, chronic obstructive
pulmonary disease (COPD), chronic obstructive airway diseases (COAD), and other
respiratory conditions