RecruitingDevice studyProject Mountain - Comparing SpO2 and SaO2 for AccuracyThe main goal of this study is to look at the performance of the neonatal, infant, and pediatric Philips SpO2 sensors with the Philips FAST Pulse Oximetry technology. Oxygen saturation measurements (SpO2) will be obtained via pulse oximetry and invasive arterial oxygen measurements (SaO2) will be obtained via arterial blood samples as part of your clinical care and assessed by co-oximetry. The study will aim to enroll a diverse population to help us understand the impact of skin pigmentation.