Pulse oximetry validation studies rely on precise reference measurements to determine device accuracy. One of the most important concepts in these studies is understanding the difference between SpO₂ and SaO₂. Although the terms are closely related, they are not interchangeable. What Is SpO₂? SpO₂ refers to oxygen saturation estimated noninvasively by a pulse oximeter. Pulse oximeters use optical sensors and photoplethysmography (PPG) signals to estimate oxygen saturation

Understanding the Fundamentals Behind Accurate SpO₂ Measurement Pulse oximetry is deceptively simple on the surface: shine light into tissue, measure what comes back, and estimate oxygen saturation. In practice, pulse oximeter design involves a series of tightly coupled optical, physiological, and signal-processing decisions that directly influence performance, inclusivity, and regulatory readiness. For device developers, understanding these fundamentals early can reduce d

Accurate oxygen saturation measurement is foundational for modern physiological monitoring, especially for developers of pulse oximeters, wearables, and multiparameter platforms. Yet many devices fail to achieve regulatory expectations because their performance is never tested across the full range of oxygen saturation levels humans experience. Controlled desaturation studies fill this gap, ensuring claims reflect real-world performance. These studies intentionally and safel

How PRL Ensures Data Integrity in Physiological Monitoring Research For CTOs and technical leaders in MedTech, data integrity is not a paperwork detail—it is the backbone of regulator-ready evidence. Whether your device requires pulse oximetry testing during controlled desaturation in a hypoxia lab, multi-parameter wearables validation, or multi-site clinical research studies, every data point must be defensible. ALCOA+ provides the industry-standard framework for achieving