Investigation of site-specific reaction rates for Nasal Alar

Abstract

A pulse oximeter is a device that non-invasively measures arterial blood oxygen saturation (SpO₂) in real-time. This technology has evolved through extensive historical research and innovations such as Takuo Aoyagi's “Ear Oximeter 5LV-5100” and is now widely used as an indicator of COVID-19 severity. In this study, we conducted comparative experiments under normal and abnormal conditions using Philips' “Nasal Alar SpO₂ sensor. ” While abnormal values similar to those observed in fingertip measurements were seen under abnormal conditions, the Nasal Alar SpO₂ sensor exhibited a tendency to display fewer abnormal values, which holds promise for future clinical applications.