Operator's Manual

Rad-97 Chapter 1: Technology Overview
www.masimo.com 28 Masimo
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Prediction of fluid Responsiveness in Mechanically Ventilated Children Undergoing
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Signal IQ
The Signal IQ provides an indicator of the assessment of the confidence in the displayed SpO
2
value. The SpO
2
SIQ can also be used to identify the occurrence of a patient’s pulse.
With motion, the plethysmographic waveform is often distorted and may be obscured by
noise artifact. Shown as a vertical line, the SpO
2
SIQ coincides with the peak of an arterial
pulsation. Even with a plethysmographic waveform obscured by artifact, the Signal IQ
identifies the timing that the algorithms have determined for the arterial pulsation. The
pulse tone (when enabled) coincides with the vertical line of the SpO
2
SIQ.
The height of the vertical line of the SpO
2
SIQ provides an assessment of the confidence in
the measurement displayed. A high vertical bar indicates higher confidence in the
measurement. A small vertical bar indicates lower confidence in the displayed measurement.
When the Signal IQ is very low, this suggests that the accuracy of the displayed measurement
may be compromised. See About the Status Bar on page 52.
rainbow Pulse CO-Oximetry Technology
rainbow Pulse CO-Oximetry technology is governed by the following principles:
1. Oxyhemoglobin (oxygenated blood), deoxyhemoglobin (non-oxygenated blood),
carboxyhemoglobin (blood with carbon monoxide content), methemoglobin