A reusable, low-cost and self-sufficient sensorbased neonatal pulse oximeter
Date
2022-05
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Abstract
Pulse oximeters are non-invasive medical health devices for measuring oxygen saturation
and pulse rate of humans. Pulse oximeters used for neonates have been identified to have
some limitations in terms of their bulkiness in size, the need for a pulse sensor attachment to
a monitoring device to obtain readings and their expensive nature. This project explores a
pulse oximeter design to eliminate these limitations and create an accurate alternative for
neonatal pulse oximeters. The proposed design includes a pulse sensor and a control and
display circuit self-sufficiently powered by a direct current source of voltage. It employs
analog signal processing, digital signal processing (DSP) with a low-power but highly
efficient microprocessor to ensure accurate values are obtained. The project explores this
design but however implemented part of the design (Infrared (IR) sensor) based on the
materials and electrical components available. Even though the proposed design was not
built as whole, various sections of the design was implemented or simulated and were
feasible. The results from the IR sensor built was compared to a commercial pulse oximeter
and from the statistical analysis conducted, the two systems have similar readings confirmed
by the t-value of 0.917 in the paired t-test. Unfiltered data was used with the algorithm
developed and the DSP and the readings for the SpO2 and pulse rate were similar to the
commercial oximeter.
Description
Capstone Project submitted to the Department of Engineering, Ashesi University in partial fulfillment of the requirements for the award of Bachelor of Science degree in Electrical and Electronic Engineering, May 2022
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Capstone Project
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Keywords
medical device