Design of A SPO2 pulse oximeter phototype

Abstract

Pulse oximetry is a non-invasive method which allows health care providers to monitor the oxygenation of patient’s blood. Oxygen saturation is the percentage of haemoglobin molecules bound with oxygen molecules. The basic principle of a pulse oxymeter is based on the measurement of the red and infrared light absorption. Infrared is absorbed more by oxygenated hemoglobin and red transmitted, by opposition to the deoxygenated cells. With the low cost and availability of Microchips, there is a question why these instruments are so expensive and why they are not available at our local drugstores like glucose meters. Based upon the above principle, a simple prototype of pulse oximeter can be made using a Microchip dsPIC30F digital signal processor and a small available LCD. Therefore, we can think about a simple, reliable and affordable product that can go into mass-production. In conclusion, with cheap, simple and available components, we have the

possibility to successfully build a prototype of pulse oximeter that can be utilized in medical centers, clinics, and nursing homes and do not have to buy the available commercialized products.