However, it can be helpful in other situations as well such as: The reading chart helps the doctors compare the values obtained while monitoring the patient. Oxygen saturation level (SpO 2 %) – the observations are categorized on the basis of oxygen levels in the bloodįor what purpose do doctors use pulse oximeter reading charts?.Observations – categorized into four groups which are normal, acceptable, seek advice from a medical expert, and need urgent medical help.It has the following information displayed on it. What is a pulse oximeter reading chart and what does it look like?Ī pulse oximeter reading chart is a table, generally, of four columns and four rows that we can utilize to know about the levels of oxygen in our blood and compare it with an individual’s reading.