Initial calibration of pulse oximeters is conducted by inducing hypoxemia in healthy human volunteers to obtain blood oxygenation levels as low as 70%. This method of calibration is expensive and time consuming for pulse oximeter manufacturers. Eliminating the human element of calibration would reduce overall cost and save time. An artificial system was developed to simulate blood oxygenation levels between 70-100% and heart rate readings between 30-150 BPM. A programmed, motorized, dual-axis system was designed to provide certain calibration values as specified by the user through a computer interface. Tests conducted with the CMS50F Wrist Oximeter showed that values obtained from the calibrator fall within +/-4% oxygenation and +/-3 BPM heart rate from that of the user defined values.
Worcester Polytechnic Institute
Major Qualifying Project
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