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Common medical oxygen sources and their characteristics (World Health Organization and the United Nations Children’s Fund, 2019).
| Medical oxygen sources & Characteristics | Connection to pipeline distribution system | Electricity-powered | Direct connection to patient | User care |
|---|---|---|---|---|
| Cylinders | Yes | No | Yes | Moderate |
| Concentrators | No | Yes | Only | Moderate |
| Oxygen plant (PSA) | Only | Yes | No | Minimal |
| Liquid oxygen transformation | Only | No | No | Minimal |
