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The objective of this study is to develop a pulse Oximeter for the determination of pulse rate and percentage of oxygen in the blood of a patient. To determine these parameters the light is transmitted through the fingertip using a photodiode as a sensor and two LED’S (RED & IR) as a light source. The photo diode detects the light and the DAQ device outputs a voltage corresponding to the amount of light detected, and the final signal is a pulse. To determine the pulse rate, first the time that elapses between two successive peaks must be determined. Second to calculate the percentage of oxygen, AC & DC voltages must be determined. Based on voltages the modulation ratio is calculated, which is the ratio of magnitude of RED waveform to that of IR waveform.

Measurement of Pulse rate and SPo2 using Pulse Oximeter developed using LabVIEW