Medical Oxygen: A Lifesaving Drug During the COVID-19 Pandemic-Source and Distribution.

Oxygen is an essential lifesaving medicine used for several indications at all levels of health care. The COVID-19 pandemic and its recent second wave have resulted in a surge in demand for necessary resources, including trained staff, hospital beds, and medical supplies like oxygen. Limited availability of these resources resulted in added risk of adverse outcomes. Also, the widespread unregulated use of oxygen by the general public in household settings poses safety concerns. This review focuses on sources of medical oxygen like cryogenic oxygen plants, pressure swing adsorption, oxygen concentrators, and oxygen cylinders. Their specifications, storage, distribution within healthcare settings, regulation, and safety concerns have been considered. Resources needed for calculating oxygen demand, surge planning, identifying the suitable source, and distribution systems for different settings have been detailed. This review aims to help the hospital administrators, biomedical engineers, and clinicians plan and rationalize oxygen usage in low- and middle-income countries during the COVID-19 pandemic.