ABSTRACT
Pulse oximeters are now widely used in various healthcare settings. The pulse oximeter measures oxygen saturation by differentiating the light absorbance of reduced and oxygenated haemoglobin during arterial pulsations. Today oximeters are more advanced, and provide a visual digital and waveform display, an audible display of arterial pulsation and heart rate, and have a variety of sensors to accommodate individuals regardless of age, size or weight (Gramlich, 1992).
