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Chapter 9: SpO2 & Rainbow Parameters Monitoring
User Manual
Operating Principals
1.Oxyhemoglobin
(oxygenated
blood),
deoxyhemoglobin
(non-oxhygenated
blood),
carboxyhemoglobin (blood with carbon monoxide content), methemoglobin (blood with oxidized
hemoglobin) and blood plasma constituents differ in their absorption of visible and infrared light
(using spectrophotometry).
Absorption Spectra
2.The
amount
of
arterial
blood
in
the
tissues
changes
with
your
pulse
(photoplethysography).Therefore, the amount of light absorbed by the varying quantities of
arterial blood changes as well.
A multi-wavelength sensor is used to distinguish between oxygenated blood, deoxygenated
blood, blood with carbon monoxide, oxidized blood and blood plasma. This sensor is utilized
with various light-emitting diodes (LEDs) that pass light through the site to a photodiode
9-5
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