He is hospitalized in covid center since last 12 days. But now his lungs are not responding,and oxygenation is going on continuously but oxygen level is not increasing. We are not getting Ventilator for him. There's Dr. are saying Ventilator must need. Are there any temporary treatment to recover him till we arrange Ventilator. Here oxygen concentrator machine is also not available. Please guide me to handle this critical situation. He is also diabetic patient aged near about 50 years