Accurate Pulse Oximeter

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Accuracy you can act on. A study comparing the accuracy in motion of a Nonin Medical pulse oximeter with PureSAT® technology and a competitor pulse oximeter was conducted at a leading hypoxia research laboratory. Accuracy was determined using an industry standard breathe-down protocol of induced hypoxia in thirteen subjects. SpO2 values are compared to the gold standard which is CO-oximetry analysis of arterial blood samples. Motion was generated using a mechanical fixture with tapping and rubbing.

Nonin oximetry with PureSAT technology was found to have superior accuracy. Nonin precision was ±2.1; competitor technology precision was ±14.4.

Accuracy you can act on. The Nonin finger pulse oximeter with PureSAT technology accurately tracked the subjects' desaturation and had an outstanding correlation with the CO-oximeter. In addition, Nonin's finger oximeter was able to read through motion. The competitor oximeter gave false high and false low SpO2 readings as compared to the CO-oximeter reference values. The competitor oximeter was unable to read through motion and provided no readings during motion as indicated by gaps in the green chart line.

Based on industry standards, published SpO2 accuracy claims would be:

  • Nonin ±3% ARMS
  • Competitor ±15% ARMS

Oximeters tested: Nonin finger pulse oximeter with PureSAT technology (made in USA); competitor finger pulse oximeter manufactured by Beijing Choice Electronic Technology Co., Ltd. (made in China).

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