Amid deepening crisis over the scarcity of oxygen, several hospitals in the national capital have been left with no option but to use their back up stock, with some like Saroj Super Speciality Hospital advising relatives to shift their patients to another facility. While Fortis Hospital (Shalimar Bagh), presently running on its back up oxygen supply, urged the prime minister, Delhi chief minister and other ministers for "immediate assistance", Saroj Super Speciality, having not received oxygen refill for the past 44 hours, is now advising its patients to shift to other hospitals. "We are running low on oxygen and using our back up now. We have alerted our patients about the situation, and are advising them to shift to another hospital. Things are really uncertain," P K Bhardwaj, medical director, Saroj Super Speciality Hospital, told PTI.