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Operating
Instructions
15
Fig 3.19
3.3.12 System Setting
Enter the submenu from the main menu, where it shows the system information and
the version shown as Fig3-20
Fig 3.20
3.4 Power Supply
The oximeter uses 4 AA Ni-MH rechargeable batteries, which can work 24 hours
continuously.
CHAPTER 4 Use Guide
4.1 Necessary Setup before Operating
Backlight Set
Always On
15 Second
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Operating
Instructions
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4.1.1 Adjusting date and time
Once the oximeter being powered on, the current time will be displayed on the right top
corner. Check whether the time is exact, if not please adjust it. As for detailed
operation, please refer to the time setup in Chapter 3 operation guide.
4.1.2 Clearing the old record
The measured records are not cleaned away automatically. We advise user to clear
the previous data before operation.
4.1.3 Setup of alarm limit
The default high/low alarm limit of the oximeter have been set when ex work, but user
can also set the new alarm limits according to the patient’s conditions for realizing the
best performance of oximeter.
As for the detailed operation, please refer to the alarm setting of Chapter 3 Operation
Guide.
4.2 SPO2 (Arterial oxygen saturation) Monitor
4.2.1 Chief introduction
What is SpO2 Monitoring?
SpO2 plethysmogram measurement is employed to determine the oxygen
saturation of hemoglobin in the arterial blood
，
that is the percentage of hemoglobin
molecules and oxygen molecules
。
For example, 97% hemoglobin molecules in the
red blood cells of arterial blood combine with oxygen, then the blood has a Spo2
oxygen saturation of 97%
，
the Spo2 numeric on the monitor will read 97%.The Spo2
numeric shows the percentage of hemoglobin molecules that have combined with
oxygen molecules to form oxhemoglobin. SpO2 /PLETH parameter can also
provide a pulse rate signal and a plethysmogram wave.
How do the SpO2/PLETH parameters work?
Arterial oxygen saturation is measured by a method called pulse oximetry. It is a
continuous, no-invasive method. It measures how much light, sent from light
sources on one side of the sensor, is transmitted through patient tissue to a
receiver on the other side.
The amount of light transmitted depends on many factors, most of which are
constant. However, one of these factors is blood flow in the arteries varies with
time, because it is pulsating. By measuring the light absorbing
during the pulsation, it is possible to get the oxygen saturation of arterial blood.
Detecting the pulsation gives a PLETH waveform and pulse rate signal.
Spo2 value is shown in the form of numerical value, PLETH waveform is shown in
the form of graph on the screen.