32
ENGLISH
Appendix
A. Key of Symbols
Symbol
Description
With Type BF applied part
Warning - See User Manual
%SpO
2
The pulse oxygen saturation
PR
Pulse rate (beats per minute)
Pulse rate icon
Wireless icon
Low battery voltage
SN
Serial number
B. SpO
2
Common Knowledge
1. Meaning of SpO
2
SpO
2
is the saturation percentage of oxygen in the blood, so called O2
concentration in the blood; it is defined by the percentage of oxyhemoglobin
(HbO
2
) in the total hemoglobin of the arterial blood. SpO
2
is an important phy-
siological parameter to reflect the respiration function; it is calculated
by the following method:
SpO
2
= HbO
2
/ (HbO
2
+Hb)×100%
HbO
2
are the oxyhemoglobins (oxygenized hemoglobin), Hb are those
hemoglobins which release oxygen.
2. Principle of Measurement
Based on Lamber-Beer law, the light absorbance of a given substance
is directly proportional with its density or concentration. When the light
with certain wavelength emits on human tissue, the measured intensity of light
after absorption, reflecting and attenuation in tissue can reflect the structure
character of the tissue by which the light passes. Due to that oxygenated
z
IVD
Σ
1
PHTHALATES
z
IVD
Σ
1
PHTHALATES
Summary of Contents for OXY-10
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