Non-invasive Method to Measure Blood Oxygen Saturation Accurately for All Skin Types

Peris, Casey; Lafountain, Ian; Lunderville, Kaylie; Jarad, Khaled; Pacheco, Emily; Paolillo, Marcel

Student Work

Non-invasive Method to Measure Blood Oxygen Saturation Accurately for All Skin Types

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Our group was tasked with solving an inherent need in improving pulse oximetry devices. Our goal was to create a device capable of accurately measuring blood oxygen saturation for all skin pigmentations, thicknesses, and textures. The final design included various modifications to the current pulse oximeter models in addition to implementing a laser-based circuit. Our device was tested using standard and exploratory testing methods. These included observing the effects of movement, fake nails and tattoos, and skin surface temperature. We found that movement, skin temperature, fake nails, and fake tattoos affected the accuracy of the device. Our results were consistent with the known errors of these devices found in literature. However, our team was unable to conclude that the usage of lasers was optimal compared to LEDs due to our lack of data. Future recommendations include using a circuit that has the capability to use both infrared and red lasers at the same time and testing on a diverse population.

This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

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