BT-740 Operation manual
74
P/N : 740-ENG-OPM-EUR-D03
Bistos Co., Ltd.
2018.05
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).
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.
