Pulse oximeter development often requires dependable performance feedback well before a formal regulatory accuracy study is initiated. During this stage, teams iterate on sensor hardware, algorithms, calibration curves, and signal-quality controls. To make meaningful progress, they need a repeatable way to compare performance across prototypes and study sessions. A transfer standard helps fill that role. It is an intermediary pulse oximeter system with calibration traceable

Introduction: The Foundation of Reliable Oxygenation Research Controlled desaturation studies are central to validating pulse oximeters . These studies, performed in specialized hypoxia laboratories such as PRL, safely lower arterial oxygen saturation (SaO₂) to predefined plateaus, typically from %100 to 70% SaO₂, generating reference data used to calibrate or verify pulse oximeters. At the core of this process lies one indispensable element: accurate blood gas analysis