S10/S12/S10A/S12A Patient Monitor User’s Manual
10-1
Chapter 10 SpO2
10.1. Introduction
Pulse Oxygen Saturation (SpO2) monitoring is a non-invasive technique used to
measure the amount of oxygenated haemoglobin and pulse rate by measuring the
absorption of selected wavelengths of light. The light generated in the emitter side of the
probe is partly absorbed when it passes through the monitored tissue. The amount of
transmitted light is detected in the detector side of the probe. When the pulsative part of
the light signal is examined, the amount of light absorbed by the haemoglobin is measured
and the pulse oxygen saturation can be calculated. This device is calibrated to display
functional oxygen saturation.
Wave form Display
Parameter Display
(1) Pleth waveform (Pleth): The amplitude of the waveform can directly reflect the
strength of the patient’s pulse signal. The waveform is not normalized.
(2) SpO2 value: Percentage of oxygenated hemoglobin in relation to the sum of
oxyhemoglobin and deoxyhemoglobin.
(3) Pleth bar: Proportional to the intensity of the pulse.
(4) SpO2 unit
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