Comparative Analysis of Pulse Oximeter

Pulse oximetry is a non-invasive method for monitoring a person's O2 saturation. In its most common (transmissive) application mode, a sensor device is placed on a thin part of the patient's body, usually a fingertip orearlobe, or in the case of an infant, across a foot. The device passes two wavelengths of light through the body part to a photodetector. It measures the changing absorbance at each of the wavelengths, allowing it to determine the absorbances due to the pulsing arterial bloodalone, excluding venous blood, skin, bone, muscle, fat, and (in most cases) nail polish.There are many portable oximeters are available in the market, but they are not so accurate. To make accurate oximeter we are using here ARM based microprocessor/ microcontroller. . in this paper we give the compression between the real time results of haemoglobin( from our designed pulse oximeter) and the results from pathologyof same patient. We find the our designed pulse oximeter gave 94.204 % accurate result.