Masimo Rad-5, Руководство оператора

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Rad-5/5v Chapter 1: Technology Overview
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Functional Oxygen Saturation (SpO2)
The Rad-5/5v is calibrated to measure and display functional oxygen saturation (SpO
2
): the
amount of oxyhemoglobin expressed as a percentage of the hemoglobin that is available to
transport oxygen.
Note: Dyshemoglobins are not capable of transporting oxygen, but are recognized as
oxygenated hemoglobins by conventional pulse oximetry.
General Description for Pulse Rate (PR)
Pulse rate (PR), measured in beats per minute (BPM) is based on the optical detection of
peripheral flow pulse.
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 Signal SIQ and Pulse Bar on page 25.