O2 cylinders have been around for quite some time and can provide increased flow rates for patients who need to wear a cover, although the cylinder must be continually replaced with another. Patients who need help breathing throughout the day can go through a couple of cylinders each week, and transporting cylinders is really difficult. A home oxygen concentrator, in any case, uses the air in the room and thus does not need another concentrator supplement.
Any other reason why you should avoid using oxygen cylinders :
Reliable supply -
Easy transportation -portable oxygen concentrator
Safety Purpose -