which gas is used in oxygen cylinder in hospital
Medical gas supply Oxygen may be used for patients requiring supplemental oxygen via mask. Usually accomplished by a large storage system of liquid oxygen at the hospital which is evaporated into a concentrated oxygen supply, pressures are usually around 345-380 kPa (50-55 psi),[1][2] or in the UK and Europe, 4-5 bar (approximately 58-72 psi).[3] This arrangement is described as a vacuum insulated evaporator (VIE) or bulk tank.[4] In small medical centers with a low patient capacity, oxygen is usually supplied by a manifold of multiple high-pressure cylinders. In areas where a bulk system or high-pressure cylinder manifold is not suitable, oxygen may be supplied by an oxygen concentrator. However, on site production of oxygen is still a relatively new technology.