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The Nonin Onyx Vantage 9590 fingertip pulse oximeter measures blood oxygen saturation (SpO2) and pulse rate. It uses Nonin PureSAT technology and includes a clinician-facing LED display and three-color pulse quality indicator. The listing identifies the model for pediatric and adult use.

This model is intended for settings that use fingertip pulse oximeters for spot checks, including the clinical and emergency-response settings described in the product information. Its compact size, automatic turn-on and turn-off, and LED display are stated product features. The listing gives a finger-thickness range of 8 mm to 25.4 mm and identifies pediatric and adult use. Follow the manufacturer's instructions and applicable clinical protocols when selecting and using the device.
What does the 9590 measure?
It measures blood oxygen saturation (SpO2) and pulse rate, as described in the product information.
What is PureSAT?
PureSAT is the Nonin SpO2 technology identified for this model. Refer to the device instructions for details about operation and interpretation.
What finger thickness does it accommodate?
The listed range is 8 mm to 25.4 mm (0.3 to 1.0 inches). Confirm fit and use according to the manufacturer's instructions.
What does the pulse quality indicator show?
The device has a three-color pulse quality indicator. Consult the manufacturer's instructions for the meaning of the indicator colors.