Functional Versus Fractional Saturation - EDAN VE-H100B User Manual

VE-H100B Veterinary Pulse Oximeter User Manual
absorption, the amount of red and infrared light absorbed by blood
is related to hemoglobin oxygen saturation. To identify the oxygen
saturation of arterial hemoglobin, the oximeter uses the pulsatile
nature of arterial flow.
During systole, a new pulse of arterial blood enters the vascular
bed, and blood volume and light absorption increase. During
diastole, blood volume and light absorption reach their lowest
point.
The oximeter bases its SpO measurements on the difference
2
between maximum and minimum absorption (measurements at
systole and diastole). By doing so, it focuses on light absorption
by pulsatile arterial blood, eliminating the effects of non-pulsatile
absorbs such as tissue, bone and venous blood.
Wavelength
The sensor contains LEDs that emit red light at a wavelength of
approximately 660 nm and infrared light at a wavelength of
approximately 900 nm.
8.2 Functional Versus Fractional
Saturation
This oximeter measures functional saturation-oxygenated
hemoglobin expressed as a percentage of the hemoglobin that can
transport oxygen. It does not detect significant amounts of
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