With an aim to provide oxygen concentrators free of cost for people in need, an Oxygen Concentrators’ Library has been set up in the Aam Aadmi Party’s (AAP) Kalkaji MLA, Atishi’s office with the support of the American Indian Foundation and Daivik Foundation. The oxygen saturation level of people infected by the coronavirus can dip suddenly, resulting in the urgent need for oxygen concentrators. In many serious cases, the SPO2 drops dangerously for a Covid patient being shifted from home to the hospital. Patients in home isolation also may need oxygen support for a few days. To help patients of Kalkaji in such situations and to provide urgent medical assistance, the Oxygen Concentrators’ Library will lend concentrators to people for a few days free of cost, Atishi’s office said in a statement. The concentrators, which help stabilise oxygen levels can be issued to patients for up to four-five days, the statement said. SPO2, also known as oxygen saturation, is a measure of the amount of oxygen-carrying hemoglobin in the blood relative to the amount of hemoglobin not carrying oxygen.