BT-780 Operation manual
30
P/N : 780-ENG-OPM-EXP-R00
Bistos Co., Ltd.
2020.03
10 SpO
2
10.1 Overview
Blood oxygen saturation (SpO
2
) 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 SpO
2
is to fix the probe fingerstall on the patient’s finger or toe, use the finger (or toe) as a
transparent container for hemoglobin, use 660nm wavelength red light and 950nm 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 SpO
2
.
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
SpO
2
. Detection pulsation can give a “plethysmography” wave and pulse rate signal.
The main screen displays “SpO
2
” value and “plethysmography” wave.
This monitor applies to measure SpO
2
of adults (>18 years) and pediatric (<18 years,>30 days), neonate (<30 days). Contact SpO
2
probe to Patient’s finger (or toe) to get “SpO
2
” value and “plethysmography” wave.
SpO
2
function of this monitor has been calibrated in factory.
The monitor is defibrillation proof, so the monitor operates normally after defibrillation.
10.2 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
“
SpO2 Sensor 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.
Do not put the sensor on limbs with arterial duct or intravenous tube.
Do not intertwine electrosurgical equipment cable with the sensor cable.
Avoid using the monitor and sensors while using the NMR equipment, in order to avoid severe burns to the
patient as a result of induced currents.
During long time continuous monitoring of a patient, check the position of SpO2 sensor once every 2 hours, and
move properly when the skin changes or every four hours. Some patients may require more frequent inspection,
such as patients with perfusion disorders or sensitive skin, because persistent and prolonged monitoring may
increase unpredictable skin changes, such as allergies, redness, blistering or pressure necrosis.
When the measured pulse rate is not complete, then the "---".
Before using, verify compatibility between the monitor, probe and cable, otherwise it may cause injury to the
patient.
Functional testers cannot be used to evaluate the accuracy of pulse oximetry and pulse oximetry.
SpO2 low alarm limit cannot be less than 85.
NOTE
Do not put the oxygen probe and blood pressure cuff on the same limb, because blood flow occlusion during
blood pressure measurement will affect the SpO
2
readings.
The monitor cannot be used to verify the accuracy of SpO
2
probe and SpO
2
equipment.
10.3 Monitoring steps
1.
Select the appropriate SpO
2
sensor according to the patient.
2.
Turn on the monitor, and connect the SpO
2
lead wire to the monitor.
3.
Clean the measurement site, such as finger with nail polish.
4.
Put the SpO
2
sensor probe on the patient’s body.
5.
Select the appropriate alarm settings.
6.
Start monitoring.
NOTE
Turn on the monitor, plug in SpO
2
probe and connect patient’s finger (or toe), monitor displays SpO
2
wave, “SpO
2
Pulse Search” displayed in the technical alarm area until the monitor measured SpO
2
value and pulse rate. “SpO
2
Search Timeout” displayed in the technical alarm area until the monitor measured pulse rate. Check the sensor
mounting position, whether the sensor is damaged or sensor type. Reconnect the sensor or use new sensor.
10.4 Display
SpO2 parameter area is as shown in figure 10-1.
