Mindray PM-60Vet, Operator'S Manual

Page: 51 / 96

6-1
6
Measuring SpO
2
6.1 Introduction
SpO
2
measuring 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 emitted by a red and infrared light-emitting diodes passes through the
tissue and is converted into electrical signals by a photodiode. This device is calibrated
to display functional oxygen saturation.
The pulse oximeter provides:
1. Pleth waveform (Pleth): The waveform is normalized.
2. Oxygen saturation of arterial blood (SpO
2
): It is the percentage of oxygenated
hemoglobin in relation to the sum of oxyhemoglobin and deoxyhemoglobin.
3. Pulse rate (PR): It is the pulsations per minute derived from the Pleth wave.
4. Pleth bar: The number of segments indicates the pulse strength.
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1
3
4