Amid the covid-19 surge, everyone is curious to know about their oxygen saturation. The oxygen level can be estimated from a pulse oximeter. It is used to measure the oxygen level (oxygen saturation) of the blood. A pulse oximeter is useful for estimating blood oxygen levels. Dr Rajesh Malhotra, Chief, Covid department, AIIMS says that Oxygen saturation gives information about the amount of oxygen carried in the blood. The pulse oximeter should be used in the right way to know your exact level of oxygen.