How do I connect a probe from a pulse oximeter to ProSim 8 SpO<sub>2</sub> test module?
With the pulse oximeter turned on, look for the visible red light coming from the probe. This side of the pulse oximeter finger probe must go on the SpO2 Test Module with a metal plate attachment.
How does pulse oximetry work?
Pulse oximeters use wavelengths of two lights (infrared light at 940 nm and red light at 660 nm), which are absorbed differently by either oxyhemoglobin or the reduced hemoglobin to measure arterial oxygen-saturation level (SpO2).
Some pulse oximeters indicate SaO<sub>2</sub> and some indicate SpO<sub>2</sub>. Which is right?
SaO2 read from a pulse oximeter is SpO2. This has become a standard in recent years.
What does "1 count" mean in the following specification: +/- (1 count + specified accuracy of the UUT)?
1 count is equal to 1 % of SpO2 saturation. For example, if a customer tests Nellcor sensor at 95 %, he should expect the Nellcor monitor reads within "1 count" value which could be either 94 % or 96 % + accuracy of UUT.
What is Rainbow technology?
Masimo Rainbow is the first technology to noninvasively measure blood constituents and fluid responsiveness that previously required invasive procedures. Besides measuring arterial oxygen-saturation level (SpO2) and pulse rate, Rainbow technology measures following parameters as well: Hemoglobin (SpHb), Carboxyhemoglobin (SpCO) and Methemoglobin (SpMet).
Traditional Pulse oximeters use wavelengths of two lights (infrared light at 940 nm and red light at 660 nm), which are absorbed differently by either oxyhemoglobin or the reduced hemoglobin to measure SpO2 concentration. Two-wavelength oximeters cannot measure total hemoglobin or dyshemoglobins. Rainbow sensor technology uses more than 7 wavelengths of light to acquire blood constituent data based on light absorption.
