Spo Acquisition (Optional) - Progetti Rescue Life 9 Instructions For Use Manual

3 – ACQUISITION OF BIOMEDICAL PARAMETERS
3.2 SpO ACQUISITION (optional)
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The SpO Module measures functional oxygen saturation in the blood. The measurement determines the
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oxygenated hemoglobin as a percentage of the hemoglobin that can transport oxygen.
Bone, tissue, pigmentation, and venous vessels normally absorb a constant amount of light over time. The
arteriolar bed normally pulsates and absorbs variable amounts of light during the pulsations. The ratio of
light absorbed is translated into a measurement of functional oxygen saturation (SpO
Pulse oximetry is based on two principles: that oxyhemoglobin and deoxyhemoglobin differ in their
absorption of red and infrared light (spectrophotometry), and that the volume of arterial blood in tissue
(and hence, light absorption by that blood) changes during the pulse (plethysmography). A pulse oximeter
determines SpO by passing red and infrared light into an arteriolar bed and measuring changes in light
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absorption during the pulsatile cycle. Red and infrared low-voltage light-emitting diodes (LED) in the
oximetry sensor serve as light sources; a photo diode serves as the photo detector.
Because oxyhemoglobin and deoxyhemoglobin differ in light 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 monitor 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 pulse oximeter bases its SpO
measurements on the difference 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-pulsed absorbers such as tissue, bone, and venous blood.
SPO SENSORS
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The RESCUE LIFE 9 is equipped with a SpO
Other sensors from the manufacturer could also be used with the RESCUE LIFE 9.
The following table shows all available sensors that may be used with the RESCUE LIFE 9. Choose the
sensors to suit the weight of the patient.
Reusable sensors may be reused on different patients after cleaning and disinfecting.
Do not use other sensors aside from the ones recommended.
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Rescue Life – Instruction For Use
Pulse oximetry works by having light emitting diodes pass red
and infra-red light into arteriolar vascular beds such as a
finger or a toe and having the light detected by a photo
detector afterwards.
sensor that is designed to be used with a finger of the patient.
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Rev.0.5 – 30/03/2022
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