Mindray BeneHeart D3, Operator'S Manual

Page: 91 / 186

12-1
12
Monitoring SpO
2
12.1 Introduction
SpO
2
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 probe passes through the
tissue and is converted into electrical signals by the photodetector in the probe. The SpO
2
module processes the
electrical signal and displays a waveform and digital values for SpO
2
and pulse rate.
This device is calibrated to display functional oxygen saturation. It provides the following measurements.
1. Pleth wave: visual indication of patient’s pulse. The waveform is not normalized.
2. SpO
2
unit
3. SpO
2
alarm high limit
4. SpO
2
alarm low limit
5. Oxygen saturation of arterial blood (SpO
2
): percentage of oxygenated hemoglobin in relation to the sum of
oxyhemoglobin and deoxyhemoglobin.
6. Perfusion indicator: the pulsatile portion of the measured signal caused by arterial pulsation.
6
3
1
5
4
2