S12 Vet 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.
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
(5)
SpO2 alarm limits:
If the SpO2 alarm is turned off, the alarm off icon is displayed
here.
(6)
Perfusion index (PI): Applicable for SpO2 module. Gives the numerical value for
the pulsatile portion of the measured signal caused by arterial pulsation. PI indicates
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