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

Continuous blood pressure monitoring devices generate large volumes of rapidly changing physiological data. In validation studies, even minor timing mismatches between investigational and reference systems can produce misleading accuracy results. Time alignment is therefore one of the most critical factors in continuous blood pressure validation. Blood Pressure Changes Constantly A reference measurement collected even a few seconds earlier or later may not represent the sa

Blood pressure technologies now range from traditional cuff-based monitors to advanced systems that estimate pressure frequently or continuously. While both aim to report systolic and diastolic blood pressure, intermittent and continuous devices are validated differently because their outputs, clinical use cases, and reference pairing needs are fundamentally different. Understanding the validation pathway early helps sponsors select the correct reference method, build the ri

Cuffless blood pressure technologies are transforming physiological monitoring by enabling continuous, wearable, and minimally intrusive measurement approaches. Validating these devices requires careful study design because traditional cuff-based reference techniques do not always match continuous or near-continuous outputs. For continuous non-invasive blood pressure systems, validation expectations are addressed by ISO 81060-3. Selecting the correct reference method is one