Mindray DPM 1 Manuel de l'opérateur télécharger pdf (Page 63)

7-1

7 SpO

Monitoring

This monitor can be equipped with any of the following SpO

modules:

 Mindray DS SpO

module

 Masimo SpO

module

 Nellcor SpO

module.

A monitor, equipped with a Masimo or Nellcor SpO

module, is marked by “Masimo SET”

or “Nellcor” at the lower left corner of the front panel. The following pages respectively

gives introduction to the above three SpO

modules. Please read this chapter according to

your monitor configuration before operation.

7.1 Introduction

SpO

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

module processes the electrical signal

and displays a waveform and digital values for SpO

and pulse rate.

This device is calibrated to display functional oxygen saturation. It provides four

measurements:

1. PLETH waveform (PLETH): visual indication of patient’s pulse. The waveform is

normalized.

2. Oxygen saturation of arterial blood (SpO

): percentage of oxygenated hemoglobin in

relation to the sum of oxyhemoglobin and deoxyhemoglobin.

3. Perfusion indicator: the pulsatile portion of the measured signal caused by arterial

pulsation.

4. Pulse rate (derived from pleth wave): detected pulsations per minute.

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Mindray DPM 1 Manuel de l'opérateur Page 63