The surge in COVID-19 triggers a shortage of oxygen cylinders.Various alternatives have emerged, one of which is oxygen concentrators which are starting to be offered in many online stalls.From its shape, the oxygen concentrator is similar to an oxygen generator engine.While the price, it is more expensive than oxygen cylinders in general.General chairman of the Indonesian Lung Doctors Association (PDPI), Dr. Agus Dwi Susanto, SpP(K), FISR, FAPSR explained that oxygen concentrator is one of the supporting tools for oxygen supplementation.Considering that oxygen levels in the air are generally only around 21 percent, this tool works to increase oxygen levels by 90-95 percent."The source of oxygen in supplementation, the source of oxygen can come from: first, pure oxygen in the form of gas available in tubes or in central oxygen in the hospital, the form is already gas ready to use," explained Dr. Agus at detik.com."Second, is oxygen that comes from products produced by the oxygen concentrator mechanism. Oxygen concentrator is a tool that can change the condition of the oxygen content of free air which is only 21 percent to a higher concentration of up to 90-95 percent," he continued.Oxygen concentrator works to change the free oxygen in the air into purer oxygen.From this device, oxygen can be delivered to the user directly using a hose to be inhaled without using a tube.He added, before there were many COVID-19 patients, this tool was commonly used by lung disease patients to treat mild oxygen deficiency conditions.The oxygen delivery of this device is not as high as that of other, more sophisticated oxygen supplementation devices.He also emphasized that COVID-19 patients who experience shortness of breath must immediately receive hospital treatment.This is because low oxygen levels do not only require oxygen supplementation such as from an oxygen concentrator, but also injection and infusion drugs."Once you catch COVID, you have shortness of breath and you need oxygen, you have to go to the hospital. That has to be emphasized, it's mandatory so that people don't mistakenly stay at home. Some cases die at home because they can't be helped, it's considered enough to use oxygen. only oxygen," concluded Dr. Agus.