Pronto
Chapter 1: Technology Overview
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Masimo
Masimo SET® DST
This figure is for conceptual purposes only.
General Description for Oxygen Saturation (SpO2)
Pulse oximetry is governed by the following principles:
1.
Oxyhemoglobin (oxygenated blood) and deoxyhemoglobin (non-oxygenated
blood) differ in their absorption of red and infrared light (spectrophotometry).
2.
The amount of arterial blood in tissue changes with your pulse
(photoplethysmography). Therefore, the amount of light absorbed by the varying
quantities of arterial blood changes as well.
Functional Oxygen Saturation (SpO2)
The Pronto is calibrated to measure and display functional oxygen saturation (SpO2): the
amount of oxyhemoglobin expressed as a percentage of the hemoglobin that is available to
transport oxygen.
Note
: Dyshemoglobins are not capable of transporting oxygen, but are recognized as
oxygenated hemoglobins by conventional pulse oximetry.
General Description for Pulse Rate (PR)
Pulse rate (PR), measured in beats per minute (bpm), is based on the optical detection of
peripheral flow pulse.
General Description for Perfusion Index (PI)
The Perfusion Index (PI) is the ratio of the pulsatile blood flow to the non-pulsatile or static
blood in peripheral tissue. PI thus represents a noninvasive measure of peripheral perfusion
that can be continuously and noninvasively obtained from a pulse oximeter.
