InSpectra StO2; tissue oxygen saturation monitor

The InSpectra™ StO2 System is a tissue oxygen saturation monitor.  It measures oxygen in the capillary bed of muscle (usually in the hand) to give valuable information about perfusion and oxygenation.  Recording each 2-second measurement, the InSpectra™ StO2 System is incredibly responsive and gives clinicians a valuable tool to help measure shock in the trauma victim.  Unlike most pulse oximeters that measure saturation of blood in an artery, the InSpectra™ StO2 System does not require a pulse or blood pressure to make a measurement.  It can therefore be used in very low-flow states or even cardiac arrest.

The InSpectra™ StO2 System works by illuminating tissue approximately 15mm below the sensor with four calibrated wavelengths of near infrared light. The returned light is analysed to produce tissue oxygen saturation (StO2), a direct measurement of oxygen saturation in the microcirculation, where oxygen is exchanged with tissue.  Despite the complexity of tissue and its many potential confounding factors, the InSpectra™ StO2 System obtains accurate, reproducible StO2 readings. The InSpectra™ StO2 System, with its patented algorithm, accounts for total haemoglobin differences between patients, as well as light-scattering variables such as fat and tissue density.

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