SYLLABUS REFERENCE
analyse information from secondary sources to identify current technologies that allow measurement of oxygen saturation and carbon dioxide concentrations in blood and describe and explain the conditions under which these technologies are used.
<;Secondary source 1
http://www.equipmentexplained.com/physics/respi_measurements/oxygen/oximeter/pulse_oximeter.html
Pulse oximeters measure how much of the hemoglobin in blood is carrying oxygen (oxygen saturation).
If you work in healthcare (or have been patient !) you are very likely to have come across pulse oximeters. You can find them in areas such as operating rooms, recovery, critical care, wards, and ambulances
Pulse oximeters are in common use because they are:
non invasive
cheap to buy and use
can be very compact
detects hypoxaemia earlier than you using your eyes to see cyanosis.
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