P3.6 - Pulse Oximetry

Haemoglobin in red blood cells can carry 4 oxygen molecules.

In a “normal healthy person”, around 96-99% of the haemoglobin travelling around in arteries has been saturated with oxygen.

This can be quoted as ‘SpO_2’ % = 98.

It is measured by using light and infra-red from 2 LEDs; comparing absorption of these waves…