Konica Minolta PULSOX-300i 用户手册

34

¢

SpO

2

＝

 100 (% SpO

2

)

C（HbO

2

）

C（HbO

2

）＋C（Hb）

Absorption coef

ficient

Wavelength

Red light

Infrared light

This instrument measures the oxygen saturation (SpO

2

) in arte-

rial blood and pulse rate continuously in a non-invasive method 

by applying optical principles.

With this instrument, SpO

2

 is defined by the following equation.

where

C (Hb): 

Concentration of reduced hemoglobin

C (HbO

2

):  Concentration of oxyhemoglobin

The light-absorption characteristics of reduced hemoglobin (Hb) 

are very different from those of oxyhemoglobin.  This instrument  

measures the changes in the absorption of red and infrared 

lights passing through the tissue to determine the SpO

2

 of the 

blood.  Thus, this method is free from the effects of skin color, 

muscles, bones, and veins.