Northern Meditec Crius V6, Руководство оператора

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Chapter 8 SpO2 (optional)
8.1 Overview
Blood oxygen saturation (SpO2) is the percentage of oxyhemoglobin (HbO2) capacity bound by
oxygen in the blood in the total hemoglobin (Hb) capacity that can be combined, that is, the
concentration of oxygen in the blood.
The principle for monitoring the pulse SpO2 is to fix the probe fingerstall on the patient’s finger,
use the finger as a transparent container for hemoglobin, use 660nm wavelength red light and
880nm near-infrared light as the incident light, maximum output power is 300 mw, measure the
light transmission intensity through the tissue bed, and calculate the concentration of hemoglobin
and SpO2.
The passing lights depend on a variety of factors, most of which are constant. However, one of
these factors, the arterial blood flow, changes with time, as it is pulsating. By measuring the light
absorbed during pulsating, it is possible to obtain the arterial blood SpO2. Detection pulsation can
give a “plethysmography” wave and pulse rate signal.
The main screen displays “SPO2” value and “plethysmography” wave.
This monitor applies to measure SPO2 of adults (>18 years), pediatric (30 Days to18 years).
Contact SPO2 probe to Patient’s finger to get “SPO2” value and “plethysmography” wave
SPO2 function of this monitor has been calibrated in factory.
8.2 Safety Information
Warning

Please use SpO2 sensor specified in this Manual, operate in accordance with the Manual,
and observe all warnings and precautions.

Before monitoring, check whether the sensor cable is normal. When SPO2 sensor cable is
unplugged from the socket, the screen will display [SPO2Sensor OFF] error message, and
trigger an audible and visual alarm simultaneously.

If the sensor or sensor packaging has signs of damage, do not use this SPO2 sensor;
return it to the manufacturer.

If there is carboxyhemoglobin, methemoglobin or dye diluted chemical, the SPO2 value
will have deviation.

When the patient has a tendency to hypoxia, use the oximeter to analyze blood samples
in order to fully grasp the patient's condition.